Freightliner Cascadia Technical Manual Freightliner Cascadia Technical Manual

Electrical System and Main PDM Overview G02.01

Table of Contents

System Overview

Terms and Abbreviations .............................................................. 500

Electronic Power Distribution ........................................................... 501

Electrical Power Distribution ............................................................ 502

Main Ground Junction Block (MGJB), Module 280 ........................................... 503

MEGA Fuse Junction Block (MFJB), Module 285 ............................................ 504

Powertrain PDM, Module 286 .......................................................... 505

Load Disconnect Switch, Module 293 .................................................... 506

Trailer PDM, Module 296 .............................................................. 507

PDM Diagram ...................................................................... 508

Related Subjects .................................................................... 509

Components

Component Locations ................................................................ 600

Component Details .................................................................. 601

Troubleshooting

Possible Causes .................................................................... 700

Diagnostic Tools Required ............................................................. 701

Diagnosis .......................................................................... 702

Specifications

SAM Cab Fuses and Relays ........................................................... 800

SAM Chassis Fuses and Relays ........................................................ 801

MFJB Fuses ....................................................................... 802

Powertrain PDM and Trailer PDM Fuses and Relays ......................................... 803

Cascadia Troubleshooting Manual, August 2007

Electrical System and Main PDM Overview G02.01

500 — Terms and Abbreviations

Backbone—The main J1939 datalink wiring that lies between the two terminating resistors. It does not include

the branch circuits to each ECU or to the diagnostic connector.

CAN—Controller Area Network

CAN ID—The identifier for a specific message, which also contains the source address of the sending ECU

communicating on the J1939 datalink.

CGW—Central Gateway

Communication Protocol—A set of rules governing communication between electronic devices.

Datalink—A collection of wires, connecting system components, through which data is transmitted.

Datalink Topology—The arrangement in which the nodes (ECUs) of a datalink are connected to each other.

Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.

Diagnostic Connector—A 9-pin diagnostic connector is used for troubleshooting the electrical system.

®

MFJB—MEGA

MGJB—Main Ground Junction Block

Fuse Junction Block

SA—Source Address; indicates numeric assignment for a device that communicates on J1939.

SAM—Signal Detect and Actuation Module

SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-

tionality. See G02.04 — SAM Cab for more information.

SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-

ality. See G02.05 — SAM Chassis for more information.

501 — Electronic Power Distribution

The multiplexed system contains the following power distribution components:

• SAM Cab (relays and fuses), Module 32A

• SAM Chassis (relays and fuses), Module 32K

The SAM Cab and SAM Chassis are electronic control units (ECUs) that have power distribution components
such as fuses and relays on them. Refer to G02.04 — SAM Cab and G02.05 — SAM Chassis for more infor­mation.

502 — Electrical Power Distribution

Standard electrical power distribution provides battery power to the electronics system, but it is not controlled by
electronics.

The following modules are part of power distribution:

• Main Ground Junction Block (MGJB), Module 280

• MEGA Fuse Junction Block (MFJB), Module 285

• Powertrain PDM, Module 286

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G02.01 Electrical System and Main PDM Overview

• Load Disconnect Switch, Module 293

• Trailer PDM, Module 296

503 — Main Ground Junction Block (MGJB), Module 280

The MGJB is a main node for connecting a returning ground to the battery. Many of the ground circuits previ­ously on the starter are now on the MGJB.

504 — MEGA Fuse Junction Block (MFJB), Module 285

The MFJB houses up to 5 MEGA fuses, and provides power to the engine harness, SAM Cab, SAM Chassis,
chassis-mounted trailer PDM, and an inverter.

The advantage of using an MFJB is that it provides increased robustness in the engine control and cab control
electronic systems during cranking. This is because the cab electrical system is fed from the battery through the
MFJB, and no longer from the starter. Separate starter cables provide both higher voltage levels and cleaner
power during cranking.

Additionally, there are improvements in circuit protection, and starter connection integrity (fewer circuits to con­nect at the starter stud).

505 — Powertrain PDM, Module 286

The Powertrain Power Distribution Module (PT-PDM) is dedicated to providing battery and ignition power to the
engine (ECM), after treatment device (ATD), transmission (TCU), as well as other powertrain-related circuits. It is
mounted in the engine compartment, above the quarter fender on the driver side of the vehicle.

506 — Load Disconnect Switch, Module 293

The load disconnect switch is used to disconnect (or open) the connection between the battery and the MFJB.
Turning the load disconnect switch to the off position does not disconnect the batteries from the starter.

NOTE: If the engine is running, turning the load disconnect switch to the OFF position will not shut off
the engine. The powertrain PDM still gets battery voltage from the emergency power feed on the SAM
system.

The load disconnect switch is mounted on one of three locations:

• Inside the cab on the left side of the driver’s seat on a left-hand-drive vehicle.

• On the battery box.

• Outboard-mounted on the left frame rail.

507 — Trailer PDM, Module 296

The trailer PDM is used to supply trailer power to the chassis-mounted trailer receptacles. The SAM Chassis
supplies control outputs to the remote trailer PDM. The trailer PDM is powered through the vehicle’s battery sys­tem. The SAM Chassis does not supply battery power to the trailer PDM. See Fig. 1.

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Electrical System and Main PDM Overview G02.01

508 — PDM Diagram

PT−PDM

SAM

Cab

SAM

Chassis

Trailer

PDM

Inverter

Emergency Power Feed

04/24/2007

509 — Related Subjects

• G02.04 — SAM Cab

• G02.05 — SAM Chassis

• P01.01 — Starting and Charging

MFJB MGJB

Load Disconnect

Switch

f545016

Fig. 1, PDM Diagram

Cascadia Troubleshooting Manual, August 2007

G02.01/3

G02.01 Electrical System and Main PDM Overview

600 — Component Locations

1

06/20/2007

1. SAM Cab

2. Powertrain PDM

3. SAM Chassis

4. Main Ground Junction Block

7

6

5

4

3

2

f001175

5. MEGA Fuse Junction Block

6. Load Disconnect Switch

7. Trailer PDM

Fig. 2, Component Locations

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Electrical System and Main PDM Overview G02.01

601 — Component Details

X21

R11

R7

F22

X4

F1 R1

X1

X5

X2

X6

X3

X7

X8

X9

F19

R3

X18

X19

X20

F29

X14

X15

X16

X17

R14

F40

R15

NOTE: The square labels indicate fuses and relays,
and the circular labels indicate connectors.

09/19/2007

F18 R6 F28 R10F13

f545092

Fig. 3, SAM Cab Fuses and Relays (top)

Cascadia Troubleshooting Manual, August 2007 G02.01/5

G02.01 Electrical System and Main PDM Overview

01/25/2007

Fig. 4, SAM Chassis

6

12345

06/20/2007 f545017

1. Position 1

2. Position 2

3. Position 3

Fig. 5, MEGA Fuse Junction Block

4. Position 4

5. Position 5

6. Supply

f544954

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Electrical System and Main PDM Overview G02.01

05/18/2007 f545054

Fig. 6, Powertrain PDM

700 — Possible Causes

• Water Intrusion

• Voltage Spikes

• Short Circuits

• Missing Fuse/Relay

• Incorrect Fuse Rating

701 — Diagnostic Tools Required

• Digital Multimeter

702 — Diagnosis

Refer to the schematic in modules 280 and 285 for an overview of the vehicle power distribution system for trou­bleshooting. Use Table 1to cross reference the individual modules for each subsystem.

Cascadia Troubleshooting Manual, August 2007

G02.01/7

G02.01 Electrical System and Main PDM Overview

Power Distribution with Module Numbers

Source Battery Node

Starter Bat Terminal

Alternator Bat Terminal Alternator — 125

Grid Heater Heater Element — 12C

Jump Start Post — — 295

Battery

Emergency Power Supply

Load Disconnect Switch MFJB

Table 1, Power Distribution with Module Numbers

Input/Output

Device

Starter Motor — 155

SAM Cab — 32A

SAM Chassis — 32K

Secondary Battery Module

Powertrain PDM 286

SAM Cab 32A

SAM Chassis 32K

Trailer PDM 296

Inverter 337

800 — SAM Cab Fuses and Relays

SAM Cab Relays

Part Name

R1 PWR FD SPARE 1 and 3, BAT

R2 PWR FD SPARE 2 and 4, BAT

R3 HEATED SEAT, IGN

R4 DASH PWR RCPT 1 and 2, BAT

R5 FLT MGM SYS and CB, BAT

R6 PWR RCPT3 and STD HVAC, BAT

R7 DRV INFO/GAUGE, IGN

R8 ICU/VEHICLE SYS, IGN

R9 AMPLIFIER PWR, ACC

R10 MIRROR HEAT

R11 PWR RCPT 6 / FRIG, BAT

R12 PWR RCPT 5, BAT

R13 CAB LIGHTING, BAT

R14 PWR RCPT4/CIR FAN/LAMP, BAT

R15 PWR WINDOW, ACC

Table 2, SAM Cab Relays

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Electrical System and Main PDM Overview G02.01

SAM Cab Fuses

Part Name

F1

F2 CAB/SLPR HVAC CTRL/SHF PNL (15A)

F3 PWR FD SPARE 2 and 4 (30A)

F4 MSF (15A)

F5 OBD J1939—BAT (10A)

F6 DASH PWR RCPT 1 (15A)

F7 DASH PWR RCPT 2 (15A)

F8 PHONE/RADIO—BAT (15A)

F9 AMPLIFIER PWR (20A)

F10 CAB HVAC MTR (30A)

F11 SLPR HVAC MTR (30A)

F12 DR CTRL L (20A)

F13 DR LOCK/SM CRUISE (20A)

F14 FLT MGM SYS and CB (25A)

F15 SLPR PWR RCPT 3 (20A)

F16 STAND ALONE HVAC (7.5A)

F17 SLPR PWR RCPT 4 (20A)

F18 TELEMATICS/WARNING SYS (15A)

F19 HEATED SEAT (20A)

F20 CGW (2A)

F21 AREA LIGHT (15A)

F22 ICU—BAT (5A)

F23 DR INF /GAUGE (15A)

F24 ICU—IGN (10A)

F25 DASH SPLICE PACK (7.5A)

F26 SRS—AIRBAG (5A)

F27 MIRROR HEAT L (10A)

F28 MIRROR HEAT R (10A)

F29 SAM RELAY COILS (3A)

F30 PWR RCPT 6 / FRIG (20A)

F31 SLPR PWR RCPT 5 (20A)

F32 PWR FD SPARE 5 and 6 (25A)

F33 SPOT LIGHT (20A)

F34 BAGGAGE COMP LAMP (3A)

F35 DOMELAMP CAB (15A)

F36 AUX CIR FAN/RD LAMP (15A)

F37 CLK/DRV INFO/CD/KEYLESS (15A)

PWR FD SPARE 1 and 3 (30A)

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G02.01 Electrical System and Main PDM Overview

SAM Cab Fuses

Part Name

F38

F39 PWR WINDOW R (15A)

F40 PWR WINDOW L (15A)

801 — SAM Chassis Fuses and Relays

Part Name

R1 H2O SEP HEAT, IGN

R2 TRLR TRN L

R3 ABS/WIF/CAMERA, IGN

R4 TRLR TRN R

R5 TRLR MARKER

R6 TRLR ABS, IGN

R7 TRLR STOP LAMPS

R8 TRLR POWER

R9 TRLR TAIL LAMPS

DR CTRL R (20A)

Table 3, SAM Cab Fuses

SAM Chassis Relays

Table 4, SAM Chassis Relays

SAM Chassis Fuses

Part Name

F1 EAPU (20A)

F2 H2O SEP HEAT (20A)

R3 ABS—BAT1 (20A)

F4 ABS—BAT2 (10A)

F5 TRLR TRN L (20A)

F6 ABS—IGN (15A)

F7 WIF/CAMERA (10A)

F8 TRLR TRN R (20A)

F9 TRLR MKR (30A)

F10 SAM RELAY COILS (5A)

F11 TRLR ABS—IGN (30A)

F12 TRLR STOP (30A)

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Electrical System and Main PDM Overview G02.01

SAM Chassis Fuses

Part Name

F13

F14 TRLR PWR (30A)

802 — MFJB Fuses

Part Name

1 Engine Harness (175A)

2 SAM Cab (175A)

3 SAM Chassis (125A)

4 Chassis-Mounted Trailer PDM (125A)

5 Inverter (200A)

TRLR TAIL (20A)

Table 5, SAM Chassis Fuses

MFJB Fuses

Table 6, MFJB Fuses

803 — Powertrain PDM and Trailer PDM Fuses and Relays

Powertrain PDM Fuses and Relays

Part Name

F1 N/A

F2 TRANS ECU IGN FUSE

F3 FUEL HEATER FUSE

F4 FUEL HEATER FUSE

F5 ENGINE IGN

F6 SAM CHASS

F7 PLVD/REMOTE SENSE

F8 ENGINE ECU BATT FUSE

F9 CPC/ENG ECU BATT FUSE

F10 TRANS BATT FUSE

F11 TRANS BATT FUSE

F12 TRANS BATT FUSE

R1 TRANS BACKUP RELAY

R2 MEIIR RELAY

R3 NEUTRAL RELAY/START ENABLE

R4 SPARE RELAY/HEAT RELAY

Cascadia Troubleshooting Manual, August 2007 G02.01/11

G02.01 Electrical System and Main PDM Overview

Powertrain PDM Fuses and Relays

Part Name

R5

R6 70A IGN RELAY

N/A

Table 7, Powertrain PDM Fuses and Relays

Cascadia Troubleshooting Manual, August 2007G02.01/12

Datalink Communication Structure G02.02

Table of Contents

System Overview

Terms and Abbreviations .............................................................. 500

Multiplexing Overview ................................................................ 501

Vehicle Datalinks Overview ............................................................ 502

SAE J1587/J1708 Datalink ............................................................ 503

SAE J1939 Datalink .................................................................. 504

Cabin CAN Datalink .................................................................. 505

Diagnostic CAN ..................................................................... 506

ECU Troubleshooting Datalinks ......................................................... 507

ECU Configuration ................................................................... 508

Datalink Network Topology . ............................................................ 509

Related Subjects .................................................................... 510

Components

Component Locations ................................................................ 600

Component Details .................................................................. 601

Troubleshooting

General Troubleshooting Techniques ..................................................... 700

Diagnostic Tools Required ............................................................. 701

Fault Codes ........................................................................ 702

References ........................................................................ 703

Possible Causes .................................................................... 704

Specifications

Wiring ............................................................................ 800

Datalink Communication Rates ......................................................... 801

ECU Identification on Datalinks ......................................................... 802

Cascadia Troubleshooting Manual, August 2007

Datalink Communication Structure G02.02

500 — Terms and Abbreviations

Backbone—The main J1939 datalink wiring that lies between the two terminating resistors. It does not include

the branch circuits to each ECU or to the diagnostic connector.

Baud Rate—The rate at which data is transmitted in bits per second.

Branch Circuit—The section of J1939 datalink between the backbone and each ECU that has J1939, and be-

tween the backbone and the diagnostic connector.

Cabin CAN—A proprietary datalink connecting certain ECUs on the vehicle, specifically the CGW, MSF, SAM

Cab, and SAM Chassis.

CAN—Controller Area Network

CAN ID—The identifier for a specific message, which also contains the source address of the sending ECU

communicating on the J1939 datalink.

CGW—Central Gateway

Communication Protocol—A set of rules governing communication between electronic devices.

Datalink—A collection of wires, connecting system components, through which data is transmitted.

Datalink Topology—The arrangement in which the nodes (ECUs) of a datalink are connected to each other.

Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.

Diagnostic Connector—A 9-pin diagnostic connector is used for troubleshooting the electrical system.

ECU—Electronic Control Unit, typically connected to a datalink.

J1939 Terminating Resistors—The J1939 datalink has two 120-ohm terminating resistors, one at each end of

the backbone. The total datalink parallel resistance is 60 ohms.

MID—Message Identifier

MSF—Modular Switch Field

Off-board tool—Typically refers to a PC-based application that communicates with the vehicle datalinks via a

connection to the diagnostic connector.

SA—Source Address; indicates numeric assignment for a device that communicates on J1939.

SAM—Signal Detect and Actuation Module

SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-

tionality. See G02.04 — SAM Cab for more information.

SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-

ality. See G02.05 — SAM Chassis for more information.

501 — Multiplexing Overview

The term "multiplexing" describes the electrical system. Multiplexing is defined as sending multiple electronic
messages simultaneously through the same signal path. All the wires used for sending electronic messages
make up what is called the "datalink."

Multiplexing allows the electrical system to simultaneously perform tasks and to monitor components. A multi­plexed system uses electronic control units (ECUs) to operate the various systems on the vehicle (lighting,
braking, and wipers, for example). The electrical system components, such as switches and lamps, are con-

Cascadia Troubleshooting Manual, August 2007 G02.02/1

G02.02 Datalink Communication Structure

nected to the ECUs, which collect and control all information about the components by communicating on a
datalink. See Fig 1.

Headlamps

11/20/2006

OFF

H

SAM Cab

P

Parklamps

LH Headlamp Low Beam

Cab CAN

LH Headlamp High Beam

SAM Chassis

RH Headlamp Low Beam

RH Headlamp High Beam

Fig. 1, Example of Multiplexed System with ECUs and Electrical Components

f543944a

The multiplexed electrical system on this vehicle combines traditional power distribution module (PDM) devices,
such as relays and circuit breakers, with electronic devices (ECUs) that communicate over a vehicle datalink.
The electronic devices can control power distribution to the electrical loads on the vehicle. This is done by moni­toring inputs (from devices such as sensors and switches) and supplying power to outputs (for devices such as
lighting, displays, gauges, and indicators). This distributed approach to handling switch inputs and controlling
electrical load outputs sharply reduces the number of wires on a vehicle by sharing wires.

502 — Vehicle Datalinks Overview

ECUs on the Cascadia electrical system communicate on four datalinks:

• J1587/J1708 datalink

• J1939 datalink

• Cabin CAN datalink

• Diagnostic CAN datalink (used strictly for off-board tool interaction with Cabin CAN ECUs)

Cabin CAN is the primary datalink for control messaging of most cab and chassis features (interior and exterior
lighting, comfort features, and optional features, for example) and has some interaction with control messaging
on the J1939 and J1587/J1708 datalinks.

G02.02/2

Cascadia Troubleshooting Manual, August 2007

Datalink Communication Structure G02.02

Diagnostic CAN
(500kbps)

SAM Cab

Cabin CAN

(125kbps)

07/02/2007

Fig. 2, Central Gateway, Diagnostic Connector, and Vehicle Datalinks

Central Gateway

SAE J1708
(9.6kbps)

SAE J1939
(250kbps)

SAE J1939−13
9−Pin connector

f040759

J1939 and J1587/J1708 remain the primary datalinks for powertrain control (engine, transmission, and ABS, for
example).

503 — SAE J1587/J1708 Datalink

The J1587 datalink is a low-speed vehicle datalink that communicates information between the electronic control
units on the vehicle. The J1587 datalink is also referred to as J1708 or "J1587/J1708."

J1708 refers to the SAE standard for the physical part of the datalink, such as the wiring and electronic compo­nents. J1587 refers to the SAE standard for the messaging protocol that communicates on the J1708 network. In
the context of vehicle repair, the terms J1708 and J1587 are used interchangeably.

G03.01 — Datalink, J1587/J1708 for more information.

See

504 — SAE J1939 Datalink

The J1939 datalink is a high-speed vehicle datalink that communicates information between electronic control
units on the vehicle.

Unlike the J1587 datalink, the J1939 datalink allows an ECU to broadcast requests as well as information. Ex­amples of information that can be communicated on the J1939 datalink are:

• engine rotational speed;

• road speed;

• transmission tailshaft speed;

• engine retarder deactivation request;

• engine torque reduction request.

The "backbone" of the J1939 datalink is the section of the datalink that is between the two terminating resistors.
Each ECU is connected to the backbone. The wiring between each ECU and the backbone is referred to as a
branch.

See G03.02 — Datalink, J1939 for more details.

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G02.02/3

G02.02 Datalink Communication Structure

505 — Cabin CAN Datalink

The Cabin CAN datalink does not have a direct connection to the diagnostic connector. Therefore, an off-board
tool (such as ServiceLink) must connect to the Diagnostic CAN pins on the diagnostic connector to troubleshoot
or configure Cabin CAN ECUs.

The Cabin CAN datalink has the following ECUs directly connected to it:

• SAM Cab

• SAM Chassis

• Modular Switch Field (MSF)

• Central Gateway Module (CGW)

G03.03 — Datalink, Cabin CAN for more information.

See

506 — Diagnostic CAN

When an off-board tool, such as ServiceLink, is connected to the vehicle, it communicates with the Cabin CAN
ECUs via the Diagnostics CAN datalink because there is no accessible service port to the Cabin CAN. The
CGW translates messages between the Diagnostic CAN and Cabin CAN datalinks, due to the different speed of
the two datalinks.

See G03.04 — Datalink, Diagnostic CAN for more information.

507 — ECU Troubleshooting Datalinks

An ECU’s "troubleshooting datalink" is the datalink that an off-board tool, such as ServiceLink, uses to communi­cate and diagnose that ECU. See Table 1.

ECU Troubleshooting Datalinks

ECU is on this

Datalink

J1708 Ye s J1587/J1708 Ye s J1587/J1708

J1939 Ye s J1939 Ye s J1939

Cabin CAN No Diagnostic CAN Ye s CAN

Fault codes are displayed on the instrument cluster (ICU) display for J1587/J1708 or J1939, depending on the
type of ICU installed. Faults from all ECUs can be viewed on ServiceLink.

Direct Connection to

Diagnostic

Connector?

Table 1, ECU Troubleshooting Datalinks

ECU Troubleshooting

Datalink

Direct Connection to

Diagnostic

Connector?

Diagnostic

Communication

Protocol

508 — ECU Configuration

All ECUs connected to the Cabin CAN datalink can have their software “flashed” using ServiceLink.

All ECUs connected to the Cabin CAN datalink, except for the CGW, have parameters that can be configured.

Some J1939 and J1587/J1708 ECUs may be reprogrammed (flashed), or have parameters configured, using
ServiceLink or the ECU manufacturer’s proprietary off-board tool. For more information, refer to the applicable

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Datalink Communication Structure G02.02

subjects in this manual, and the ServiceLink User Documentation (available via the "Help" drop-down menu in
ServiceLink).

509 — Datalink Network Topology

Cascadia Network Topology

Sub Bus

Slave Switch

Control Panels

Head Lamp

Switch

Diagnostic CAN

(500kbps)

SAM Cab

SAM Chassis

Modular Switch

Field (Master)

Standard

Optional

Cabin CAN
(125kbps)

Steering Wheel

Switches

Stalk Switch

(Steering

Column)

Central Gateway

SAE J1708
(9.6kbps)

SAE J1939

(250kbps)

SAE J1939−13
9−Pin connector

Engine Control

Module

Pneumatic ABS

Module

Transmission

Control Module

Instrument

Cluster

HVAC Control

Switches Front

HVAC Control

Switches Rear

Radio

VORAD

Engine Display

Qualcomm

07/02/2007

f040753

Fig. 3, Datalink Network Topology

Cascadia Troubleshooting Manual, August 2007 G02.02/5

G02.02 Datalink Communication Structure

510 — Related Subjects

• G02.01 — Electrical System and Main PDM Overview

• G02.03 — Central Gateway

• G02.04 — SAM Cab

• G02.05 — SAM Chassis

• G02.06 — Modular Switch Field

• G03.01 — Datalink, J1587/J1708

• G03.02 — Datalink, J1939

• G03.03 — Datalink, Cabin CAN

• G03.04 — Datalink, Diagnostic CAN

Cascadia Troubleshooting Manual, August 2007G02.02/6

Datalink Communication Structure G02.02

600 — Component Locations

2

1

3

4

5

6

05/08/2007

1. SAM Cab

2. Starpoint Connector

3. Central Gateway

4. Modular Switch Field

Fig. 4, Component Locations

Cascadia Troubleshooting Manual, August 2007 G02.02/7

7

5. J1939 Terminating Resistor

6. Diagnostic Connector

7. SAM Chassis

f544899

G02.02 Datalink Communication Structure

601 — Component Details

D

E

F

G

A

H

C

B

J

05/01/2006

Fig. 5, Diagnostic Connector

Diagnostic Connector

Pin Function

A

B Battery (+)

C J1939 CAN High (+)

D J1939 CAN Low (–)

E CAN Shield (ground)

F J1708/J1587 (+)

G J1708/J1587 (–)

H Diagnostic CAN High (+)

J Diagnostic CAN Low (–)

Battery (–)

Table 2, Diagnostic Connector

f151036b

08/29/2008 f544911

Fig. 6, Central Gateway Module, Cabin CAN Pins

Cascadia Troubleshooting Manual, August 2007G02.02/8

Datalink Communication Structure G02.02

CGW ECU (single connector)

Pin Function

1

2 J1708 (+)

3 Not used

4 Not used

5 Not used

6 Not used

7 Ground

8 J1708 (–)

9 Not used

10 Not used

11 Not used

12 Not used

13 Not used

14 Cabin CAN Low

15 Not used

16 J1939 CAN Low

17 Not used

18 Diagnostic CAN Low

19 Cabin CAN High

20 Not used

21 J1939 CAN High

22 Not used

23 Diagnostic CAN High

24 Not used

Battery Power

Table 3, CGW ECU (single connector)

Cascadia Troubleshooting Manual, August 2007 G02.02/9

G02.02 Datalink Communication Structure

14

2

3

12/04/2006 f544912

Fig. 7, Starpoint Connector

CGW ECU (single connector)

Pin Function

1

2 Not connected

3 Cabin CAN Low (to CGW)

4 Cabin CAN High (to SAM Cab)

5 Not connected

6 Cabin CAN Low (to SAM Cab)

7 Cabin CAN High (to SAM Chassis)

8 Not connected

9 Cabin CAN Low (to SAM Chassis)

10 Cabin CAN High (to MSF)

11 Not connected

12 Cabin CAN Low (to MSF)

13 Not connected

14 Not connected

15 Not connected

16 Not connected

17 Ground

18 Not connected

Cabin CAN High (to CGW)

Table 4, CGW ECU (single connector)

7 101316

5

89111214

6

15

17

18

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Datalink Communication Structure G02.02

11/29/2006

Fig. 8, Central Gateway

04/26/2006 f544831

1. Connector Tee

2. Terminating Resistor

1

Fig. 9, Connector Tee

f610854

2

Cascadia Troubleshooting Manual, August 2007 G02.02/11

G02.02 Datalink Communication Structure

1

04/18/2006 f544832

1. Terminating Resistor

Fig. 10, Terminating Resistor

700 — General Troubleshooting Techniques

Follow the steps below to troubleshoot the datalinks.

1. Identify which datalink has a problem.

2. Perform general electrical troubleshooting for wiring continuity and connections.

3. Refer to individual datalink chapters for more info to troubleshoot the specific datalink.

701 — Diagnostic Tools Required

• ServiceLink

702 — Fault Codes

Refer to G03.01 — Datalink, J1587/J1708 to troubleshoot the J1587 and J1708 datalink.

Refer to G03.02 — Datalink, J1939 to troubleshoot the J1939 datalink.

Refer to G03.03 — Datalink, Cabin CAN to troubleshoot the Cabin CAN datalink.

Refer to G03.04 — Datalink, Diagnostic CAN to troubleshoot the Diagnostic CAN datalink.

703 — References

Refer to G01.04 — How to Locate a Schematic for information on wiring.

704 — Possible Causes

Any Datalink:

• wiring

• any ECU connected to the problem datalink

J1939 Datalink:

• terminal resistor value on J1939 datalink

Cabin CAN Datalink:

• starpoint connector resistor value on Cabin CAN datalink

G02.02/12

Cascadia Troubleshooting Manual, August 2007

Datalink Communication Structure G02.02

800 — Wiring

Wiring

Datalink

J1939

J1587/J1708 Dark Green Orange

Cabin CAN Light Blue White

Brown with

Diagnostic CAN

Light Blue

Table 5, Wiring

801 — Datalink Communication Rates

Datalink Communication Rates

Datalink Kilobits Per Second

J1939 250

J1587/J1708 9600

Cabin CAN 125

Diagnostic CAN 500

Table 6, Datalink Communication Rates

Wire Color

High Low

Yellow Dark Green

Brown with

Stripe

White Stripe

802 — ECU Identification on Datalinks

ECU Identification on Datalinks

ECU Description J1587 MID* J1939 SA

Engine 128 0 —

Transmission 130 3 —

Antilock Brakes 136 11 —

Instrument Cluster 140 23 —

Vehicle Security Unit (VSU) 163 — —

Data Logging Unit (DLU) 179 251 —

Collision Avoidance System
(headway controller)

SAM Cab — — 33

SAM Chassis — — 71

Cascadia Troubleshooting Manual, August 2007 G02.02/13

219 42 —

†

CAN ID

G02.02 Datalink Communication Structure

ECU Identification on Datalinks

ECU Description J1587 MID* J1939 SA

Modular Switch Field

Central Gateway — — 37

* Message Identifier

†

Source Address

Table 7, ECU Identification on Datalinks

— — 49

†

CAN ID

Cascadia Troubleshooting Manual, August 2007G02.02/14

Central Gateway G02.03

Table of Contents

System Overview

Terms and Abbreviations .............................................................. 500

General Information ..................................................................501

Routing and Translating Messages Between Datalinks .......................................502

Interface Between Off-Board Tools and Cabin CAN ECUs .....................................503

ECU Monitoring ..................................................................... 504

ECU Configuration ...................................................................505

Related Subjects .................................................................... 506

Datalink Network Topology. ............................................................507

Components

Component Locations ................................................................ 600

Component Details ..................................................................601

Troubleshooting

Required Tools...................................................................... 700

Possible Causes .................................................................... 701

Fault Codes ........................................................................702

Cascadia Troubleshooting Manual, November 2007

Central Gateway G02.03

500 — Terms and Abbreviations

Baud Rate—The rate at which data is transmitted in bits per second.
CAN—Controller Area Network
CGW—Central Gateway
Communication Protocol—A set of rules governing communication between electronic devices.
Datalink—A collection of wires, connecting system components, through which data is transmitted.
Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.
ECU—Electronic Control Unit, typically connected to a datalink.
MSF—Modular Switch Field
Off-board tool—Typically refers to a PC-based application that communicates with the vehicle datalinks via a

connection to the diagnostic connector.

Parameter—A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows

the customer to choose how that particular feature or function will work on the vehicle.

SA—Source Address; indicates numeric assignment for a device that communicates on J1939.
SAE—Society of Automotive Engineers
SAM—Signal Detect and Actuation Module
SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-

tionality. See G02.04 — SAM Cab for more information.

SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-

ality. See G02.05 — SAM Chassis for more information.

501 — General Information

The Central Gateway is an ECU (Electronic Control Unit), also called the "Central Gateway" (CGW) ECU.
The CGW has the following wiring connections:

• Each datalink on the vehicle: J1708, J1939, Cabin CAN, and Diagnostic CAN.

• On the Diagnostic CAN, the CGW has a direct connection to the diagnostic connector.

• On the Cabin CAN, the CGW is directly connected to the starpoint connector.

Cascadia Troubleshooting Manual, November 2007 G02.03/1

G02.03 Central Gateway

Diagnostic CAN
(500kbps)

SAM Cab

Cabin CAN
(125kbps)

07/02/2007

Fig. 1, Central Gateway, Diagnostic Connector, and Vehicle Datalinks

Central Gateway

SAE J1708
(9.6kbps)

SAE J1939

(250kbps)

SAE J1939−13
9−Pin connector

f040759

The CGW has the following main functions:

• Routes and translates messages between datalinks.

• Interfaces between off-board tools and Cabin CAN ECUs.

• Provides faults for any missing Cabin CAN ECUs.

The CGW receives battery power and ground from the SAM Cab; power comes through a 2A fuse (F20) on the
SAM Cab.

502 — Routing and Translating Messages Between Datalinks

The primary function of the CGW is to connect the four datalinks on the vehicle, and to route and translate the
datalink messages between them.

The J1939, J1708, Cabin CAN, and Diagnostic CAN datalinks have different characteristics, but they all work to­gether to control the vehicle. The CGW acts as a translator between the communication protocols used on the
various datalinks.

In some instances, the Cabin CAN ECUs need information from J1939 or J1708 ECUs. In these cases, informa­tion is sent by the J1939 or J1708 ECU. The CGW picks up the information and passes it to the appropriate
Cabin CAN ECU. Similarly, the reverse happens when a J1939 or J1708 ECU needs information from a Cabin
CAN ECU.

An example of Cabin CAN and J1939 interaction is the optional cruise control feature. The Engine ECU on the
J1939 datalink broadcasts a message containing vehicle speed. The SAM Cab ECU on the Cabin CAN datalink
uses the vehicle speed information to perform the cruise control feature. The vehicle speed message flows from
the engine ECU to the SAM Cab as follows:

1. The engine ECU broadcasts the vehicle speed message on J1939.

2. The vehicle speed message is picked up by the CGW, from J1939 datalink.

3. The central gateway translates the vehicle speed message from J1939’s communication protocol to the
Cabin CAN communication protocol.

4. The central gateway routes the vehicle speed message to the Cabin CAN datalink.

5. The vehicle speed message is received by the SAM Cab ECU, and the information is used for cruise con­trol logic.

Cascadia Troubleshooting Manual, November 2007G02.03/2

Central Gateway G02.03

503 — Interface Between Off-Board Tools and Cabin CAN ECUs

The CGW acts as the interface between ECUs on the Cabin CAN and the outside world. Unlike the J1708 and
J1939 datalink, the Cabin CAN datalink does not have its own direct connection to the diagnostic connector.
Instead, it is connected to the CGW, which in turn has a direct connection to the diagnostic connector via the Di­agnostic CAN datalink.

The CGW separates the Cabin CAN from off-board tools and acts as a firewall, which protects Freightliner’s pro­prietary Cabin CAN datalink from "public" access. This allows for better protection from electrical damage and
better control of electrical capabilities, which leads to higher reliability for the ECUs.

504 — ECU Monitoring

The CGW monitors for any missing Cabin CAN ECUs. Each missing Cabin CAN ECU is described in a CAN
fault code generated by the CGW.

The CGW monitors all messages on the Cabin CAN datalink to see if an ECU stops sending messages. If this
happens, the CGW will report a fault code that a particular ECU is missing. The possible fault codes for missing
ECUs are listed in

The ECU monitoring function stops when:

• under or over voltage is detected;

702 — Fault Codes.

• the Cabin CAN stops communicating.

505 — ECU Configuration

The diagnostic protocol used for troubleshooting or configuring the Central Gateway is the Controller Area Net­work (CAN).

The Central Gateway does not have any parameters to configure.
The Central Gateway can be flashed using ServiceLink, which will flash to its same version or upgrade, if re-

quired.
The software flashing procedure should only be performed on the CGW in the following cases:

• Feature upgrade: Adding a new feature to a vehicle may require a newer version of ECU software. Ser­viceLink will automatically make available any necessary software upgrades.

• Fixing a software problem in the existing software: In case a new version of ECU software is needed
to fix a problem in the existing ECU software, ServiceLink will automatically make available any necessary
software upgrades.

• Replacement of the Central Gateway: Flashing ensures that the most recent software is on the installed
ECU.

• As a last resort: Troubleshooting has narrowed the problem down to being at the Central Gateway itself
and no other mechanical or electrical causes for the symptom have been identified. As a last resort before
swapping the ECU, flashing the CGW software with the same version may help in the case it became cor­rupt during the course of normal vehicle operation.

For instructions on how to use ServiceLink to flash the software of a CAN ECU like the Central Gateway, refer to

ServiceLink User GuideorServiceLink Help

the

user documentation, available in ServiceLink’s "Help" menu.

Cascadia Troubleshooting Manual, November 2007 G02.03/3

G02.03 Central Gateway

506 — Related Subjects

• G02.02 — Datalink Communication Structure

• G02.04 — SAM Cab

• G02.05 — SAM Chassis

• G02.06 — Modular Switch Field

• G03.01 — Datalink, J1587/J1708

• G03.02 — Datalink, J1939

• G03.03 — Datalink, Cabin CAN

• G03.04 — Datalink, Diagnostic CAN

Cascadia Troubleshooting Manual, November 2007G02.03/4

Central Gateway G02.03

507 — Datalink Network Topology

Cascadia Network Topology

Sub Bus

Slave Switch

Control Panels

Head Lamp

Switch

Diagnostic CAN
(500kbps)

SAM Cab

SAM Chassis

Modular Switch

Field (Master)

Standard

Optional

Cabin CAN
(125kbps)

Steering Wheel

Switches

Stalk Switch

(Steering

Column)

Central Gateway

SAE J1708
(9.6kbps)

SAE J1939

(250kbps)

SAE J1939−13
9−Pin connector

Engine Control

Module

Pneumatic ABS

Module

Transmission

Control Module

Instrument

Cluster

HVAC Control

Switches Front

HVAC Control

Switches Rear

Radio

VORAD

Engine Display

Qualcomm

07/02/2007

f040753

Fig. 2, Datalink Network Topology

Cascadia Troubleshooting Manual, November 2007 G02.03/5

G02.03 Central Gateway

600 — Component Locations

1

2

D

E

C

A

F

B

J

G

H

11/27/2006

3

1. Starpoint Connector 2. Central Gateway 3. Diagnostic Connector

Fig. 3, Component Locations

Cascadia Troubleshooting Manual, November 2007G02.03/6

f544909

Central Gateway G02.03

601 — Component Details

D

E

C

F

05/01/2006

Fig. 4, Diagnostic Connector

Diagnostic Connector

Pin Function

A Battery (–)
B Battery (+)
C J1939 CAN High (+)
D J1939 CAN Low (–)
E Reserved

F J1708/J1587 (+)
G J1708/J1587 (–)
H Diagnostic CAN High (+)

J Diagnostic CAN Low (–)

Table 1, Diagnostic Connector

A

G

H

B

J

f151036b

24

07/02/2007 f544911

Fig. 5, Central Gateway Module, Cabin CAN Pins

Cascadia Troubleshooting Manual, November 2007 G02.03/7

19

12 6

18

13 7 1

G02.03 Central Gateway

CGW ECU (single connector)

Pin Function

1 Battery Power
2 J1708/J1587 (+)
7 Ground

8 J1708/J1587 (–)
14 Cabin CAN Low (–)
16 J1939 Low (–)
18 Diagnostic CAN Low (–)
19 Cabin CAN High (+)
21 J1939 High (+)
23 Diagnostic CAN High (+)

Table 2, CGW ECU (single connector)

11/29/2006

700 — Required Tools

• ServiceLink

701 — Possible Causes

• Fuse F20 (CGW power) on the SAM Cab

• Wiring

f610854

Fig. 6, Central Gateway

Cascadia Troubleshooting Manual, November 2007G02.03/8

Central Gateway G02.03

• Starpoint Connector (Cabin CAN)

• CGW

• J1939 Terminating Resistors

• J1587/J1708 Junction Block

• Diagnostic Connector

• Cabin CAN ECUs

702 — Fault Codes

Fault Codes

SA SPN

37 168 4

37 168 3

37 628 12

FMI

Battery Power—Voltage below normal or
shorted to low

Battery Power—Voltage above normal or
shorted to high

Program Memory—Bad intelligent device
or component

Fault Description Fault Trigger

CGW battery power (pin 1) fell below the lower
limit of the system voltage range: 9V.

CGW battery power (pin 1) exceeded the upper
limit of the system voltage range: 16V.

The memory in the CGW has a problem.
Cabin CAN perfomance failures (communication

is not possible) occur when:

37 523510 31 Diagnostic CAN Performance

37 523511 31 Cabin CAN Performance

37 523512 31 J1939 CAN Performance

37 523513 31 J1708 Performance

• Diagnostic CAN High is shorted to GND

• Diagnostic CAN Low is shorted to BAT

• Diagnostic CAN Low is shorted to

Diagnostic CAN High

Cabin CAN perfomance failures (communication
is not possible) occur when:

• Cabin CAN High is shorted to GND

• Cabin CAN Low is shorted to BAT

• Cabin CAN Low is shorted to Cabin CAN

High

J1939 CAN performance failures (communication
is not possible) occur when:

• J1939 CAN High is shorted to GND

• J1939 CAN Low is shorted to BAT

•

J1939 CAN Low is shorted to J1939 CAN
High

J1708 performance errors occur when:

• The busload (i.e. amount of data traffic) on

J1708 is too high.

• The CAN datalinks (Cabin CAN,

Diagnostic CAN, J1939 CAN) have
extremely high busload.*

Cascadia Troubleshooting Manual, November 2007 G02.03/9

G02.03 Central Gateway

Fault Codes

SA SPN

37 524033 31 Lost communication with SAM_CAB

37 524049 31 Lost communication with MSF

37 524071 31 Lost communication with SAM_CHAS

* High bus load on a datalink may be caused by a faulty ECU, which broadcasts erroneous data, clogging up communication on the datalink.

FMI

Fault Description Fault Trigger

Trigger:

does not see any messages from the SAM Cab
for at least 20 seconds. The fault becomes
historic as soon as the CGW sees messages
from the SAM Cab.

Vehicle Behavior:

Chassis outputs may be behaving according to
"Emergency Power Mode" for a SAM Cab failure.
An indication of a SAM Cab failure is that all
gauges in the instrumentation control unit (ICU)
drop to zero because power to the ICU is lost.

Possible Causes:

connected to the Cabin CAN datalink, or does not
have power.

Action:

SAM Cab, and the CGW. Check the SAM Cab
power supply cables.

Trigger:

does not see any messages from the MSF for at
least 20 seconds. The fault becomes historic as
soon as the CGW sees messages from the MSF.

Vehicle Behavior:

on for safety. All functions where input switches
are controlled by the MSF do not function, such
as turn and hazard functions, rotary switch
(headlamp) functions, and wiper.

Action:

connections to the MSF and the CGW. Check
MSF power supply.

Trigger:

does not see any messages from the SAM
Chassis for at least 20 seconds. The fault
becomes historic as soon as the CGW sees
messages from the SAM Chassis.

Vehicle Behavior:

outputs may be behaving according to
"Emergency Power Mode" for a SAM Chassis
failure. An indication of a SAM Chassis failure is
that the ICU turn signal indicators flash alternately.

Possible Causes:

connected to the Cabin CAN datalink, or does not
have power.

Action:

SAM Chassis, and the CGW. Check the SAM
Chassis power supply cables.

Table 3, Fault Codes

The fault is triggered when the CGW

The SAM Cab and SAM

The SAM Cab is not

Check wiring from the Cabin CAN to the

The fault is triggered when the CGW

Headlights automatically turn

Check Cabin CAN wiring, especially

The fault is triggered when the CGW

SAM Cab and SAM Chassis

The SAM Chassis is not

Check wiring from the Cabin CAN to the

Cascadia Troubleshooting Manual, November 2007G02.03/10

SAM Cab G02.04

Table of Contents

System Overview

Terms and Abbreviations .............................................................. 500

General Information .................................................................. 501

Fuses and Relays ................................................................... 502

Datalink Connections ................................................................. 503

Diagnostic CAN Datalink .............................................................. 504

Functional Messaging and ECU Troubleshooting ............................................ 505

ECU Configuration ................................................................... 506

Datalink Network Topology . ............................................................ 507

Components

Component Locations ................................................................ 600

Component Details .................................................................. 601

Pinout Mapping ..................................................................... 602

Fuse Mapping ...................................................................... 603

Relay Mapping ...................................................................... 604

Troubleshooting

Troubleshooting Overview ............................................................. 700

Required Tools ...................................................................... 701

Possible Causes .................................................................... 702

Fault Codes ........................................................................ 703

Grounded Pins and Inputs ............................................................. 704

Fused and FET Controlled Outputs ...................................................... 705

Relayed Outputs .................................................................... 706

Logic Controlled Unfused Outputs ....................................................... 707

Logic Controlled Relayed Fused Outputs .................................................. 708

Unfused Constant Outputs ............................................................. 709

Fused Battery Pass-Through Outputs .................................................... 710

Specifications

Maximum Current Pin List ............................................................. 800

Cascadia Troubleshooting Manual, March 2010

SAM Cab G02.04

500 — Terms and Abbreviations

Baud Rate—The rate at which data is transmitted in bits per second.

Cabin CAN—A proprietary datalink connecting certain ECUs on the vehicle, specifically the CGW, MSF, SAM

Cab, and SAM Chassis.

CAN—Controller Area Network

CAN ID—The identifier for a specific message, which also contains the source address of the sending ECU

communicating on the J1939 datalink.

CGW—Central Gateway

CPC—Common Powertrain Controller (for M-B and DDC engines only).

Communication Protocol—A set of rules governing communication between electronic devices.

Datalink—A collection of wires, connecting system components, through which data is transmitted.

Datalink Topology—The arrangement in which the nodes (ECUs) of a datalink are connected to each other.

Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.

Diagnostic Connector—A 9-pin diagnostic connector is used for troubleshooting the electrical system.

FMI—Failure Mode Indicator. The part of a J1587, J1939, and CAN fault code that identifies how part of a de-

vice, or item on a device, failed.

HVAC—Heating, Ventilation, and Air Conditioning

ICU—Instrumentation Control Unit

I/O Controls—Input/Output controls allow a technician to activate and deactivate an input or output pin for trou-

bleshooting purposes. I/O controls appear on ServiceLink templates as buttons, typically labeled "ON" and
"OFF."

ISS—Ignition Switch Status

MSF—Modular Switch Field

NO—Normally Open

NC—Normally Closed

Off-board tool—Typically refers to a PC-based application that communicates with the vehicle datalinks via a

connection to the diagnostic connector.

OBD—Onboard Diagnostics

Parameter—A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows

the customer to choose how that particular feature or function will work on the vehicle.

PDM—Power Distribution Module

PLVD—Progressive Low Voltage Disconnect

SA—Source Address; indicates numeric assignment for a device that communicates on J1939.

SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-

tionality.

Cascadia Troubleshooting Manual, March 2010 G02.04/1

G02.04 SAM Cab

SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-

ality. See G02.05 — SAM Chassis for more information.

SPN—Suspect Parameter Number. The part of a J1939 or CAN fault code that identifies how part of a device, or

item on a device, failed.

501 — General Information

The SAM Cab is an ECU (Electronic Control Unit). It is also referred to as the "SAM Cabin."

The SAM Cab works closely with the SAM Chassis to control much of the vehicle functionality. The SAM Cab
controls most of the cab functions. The SAM Chassis controls most of the chassis functions.

This ECU uses inputs (such as switches, sensors, and datalink messages) and drives outputs (such as lights,
motors, and solenoids). See 601 — Component Details for complete pin information.

IMPORTANT: This subject describes the SAM Cab ECU in general terms. To understand a particular
function or system that the SAM Cab is part of, see the appropriate subject in this manual on that
function or system. Each subject contains details about the way a function should work, as well as
crucial information such as inputs, outputs, interlocks, any related parameters for that particular func­tion, and any other ECUs or components that are a part of that function.

502 — Fuses and Relays

The SAM Cab houses a number of fuses and relays.

See 601 — Component Details for fuse and relay locations. See 602 — Pinout Mapping, 603 — Fuse Map-
ping, and 604 — Relay Mapping for the functions associated with each pin, fuse, and relay.

For more information on the power distribution system, see G02.01 — Electrical System and Main PDM

Overview.

503 — Datalink Connections

The SAM Cab is connected directly to the Cabin CAN datalink. Cabin CAN wires run from the SAM Cab to the
starpoint connector, where it joins the rest of the Cabin CAN datalink.

See G03.03 — Datalink, Cabin CAN for details.

504 — Diagnostic CAN Datalink

When an off-board tool, such as ServiceLink, is connected to the vehicle, it communicates with the Cabin CAN
ECUs via the Diagnostics CAN datalink; there is no accessible service port to the Cabin CAN. The CGW trans­lates between the Diagnostics CAN and Cabin CAN datalink, due to the different speed and message formats of
the two datalinks.

505 — Functional Messaging and ECU Troubleshooting

To communicate with the ECU, a different set of messages is used by the off-board tool during troubleshooting
than the set of messages used during normal operation.

The set of messages used during normal operation is referred to as functional messages, which are sent cycli­cally on the Cabin CAN datalink. However, the set of messages (protocol) used during troubleshooting is referred
to as Control Area Network (CAN), which operates on a request-and-response basis over the Diagnostic CAN
datalink.

Cascadia Troubleshooting Manual, March 2010G02.04/2

SAM Cab G02.04

Any fault reported on the Cabin CAN is translated to Diagnostics CAN by the CGW, and can be displayed when
requested by an off-board tool, such as ServiceLink. Similarly, an off-board tool is able to display input and out­put pin status information, software interlocks, and allows a user to control inputs or outputs for troubleshooting.
This information is displayed in ServiceLink’s Datalink Monitor (DLM) templates.

506 — ECU Configuration

The diagnostic protocol used for troubleshooting or configuring the SAM Cab is the Control Area Network (CAN).
For more information on CAN, see G03.04 — Datalink, Diagnostic CAN.

The SAM Cab has parameters that can be viewed or changed for vehicle configuration.

The SAM Cab software can be flashed using ServiceLink, which will flash to its same version or upgrade, if re­quired.

The software flashing procedure should only be performed on the SAM Cab in the following cases:

• As a last resort: Troubleshooting has narrowed the problem down to being at the SAM Cab itself and no
other mechanical or electrical causes for the symptom have been identified. As a last resort, flashing the
SAM Cab software with the same version may help in the case it became corrupt during the course of nor­mal vehicle operation.

• For a feature upgrade: Adding a new feature to a vehicle may require a newer version of ECU software.
ServiceLink will automatically make available any necessary software upgrades.

• Fixing a problem in the existing software: In case a new version of ECU software is needed to fix a
problem in the existing ECU software, ServiceLink will automatically make available any necessary soft­ware upgrades.

• Replacing the SAM Cab: Flashing ensures that the most recent software is on the installed ECU.

For instructions on how to use ServiceLink to flash the software of a CAN ECU like the SAM Cab, refer to the
ServiceLink User Guide or ServiceLink Help user documentation, available in ServiceLink’s "Help" menu.

Cascadia Troubleshooting Manual, March 2010 G02.04/3

G02.04 SAM Cab

507 — Datalink Network Topology

Cascadia Network Topology

Sub Bus

Slave Switch

Control Panels

Head Lamp

Switch

Diagnostic CAN

(500kbps)

SAM Cab

SAM Chassis

Modular Switch

Field (Master)

Standard

Optional

Cabin CAN

(125kbps)

Steering Wheel

Switches

Stalk Switch

(Steering

Column)

Central Gateway

SAE J1708

(9.6kbps)

SAE J1939
(250kbps)

SAE J1939−13
9−Pin connector

Engine Control

Module

Pneumatic ABS

Module

Transmission

Control Module

Instrument

Cluster

HVAC Control

Switches Front

HVAC Control
Switches Rear

Radio

07/02/2007

VORAD

Engine Display

Qualcomm

f040753

Fig. 1, Datalink Network Topology

Cascadia Troubleshooting Manual, March 2010G02.04/4

SAM Cab G02.04

600 — Component Locations

2

1

3

4

5

07/18/2007

1. SAM Cab

2. Starpoint Connector

3. Central Gateway

4. Modular Switch Field

Fig. 2, Component Locations

6

5. Diagnostic Connector

6. SAM Chassis

f544916

NOTE: J1939 and J1708 ECUs in this diagram are not intended to represent actual vehicle configura­tion.

Cascadia Troubleshooting Manual, March 2010 G02.04/5

G02.04 SAM Cab

601 — Component Details

Fig. 3, SAM Cab

f54494502/07/2007

Cascadia Troubleshooting Manual, March 2010G02.04/6

SAM Cab G02.04

X18

X19

X20

12/18/2009 f544999

X21

X12 X11 X10X13

Fig. 4, SAM Cab Connectors (top view)

Cascadia Troubleshooting Manual, March 2010 G02.04/7

G02.04 SAM Cab

X21

R11

R7

F22

X4

F1 R1

X1

X5

X2

X6

X3

X7

X8

X9

F19

R3

X18

X19

X20

F29

X14

X15

X16

X17

R14

F40

R15

NOTE: The square labels indicate fuses and relays,
and the circular labels indicate connectors.

09/19/2007

F18 R6 F28 R10F13

f545092

Fig. 5, SAM Cab Fuses and Relays (bottom view)

NOTE: Not all fuse and relay locations are labeled in this image. Locations for fuses and relays in the
middle can be determined based on end labels of a row. For example, fuse F17 is one above F18,
and R8 is one below R7 and two above R10. All connectors are labeled in this image.

D

E

F

G

05/01/2006

Fig. 6, Diagnostic Connector

A

H

C

B

J

f151036b

Cascadia Troubleshooting Manual, March 2010G02.04/8

SAM Cab G02.04

Diagnostic Connector

Pin Function

A

B Battery (+)

C J1939 CAN High (+)

D J1939 CAN Low (–)

E No Connection

F J1708/J1587 (+)

G J1708/J1587 (–)

H Diagnostic CAN High (+)

J Diagnostic CAN Low (–)

602 — Pinout Mapping

Battery (–)

Table 1, Diagnostic Connector

NOTE: The housing of the SAM Cab contains raised lettering, labeling all connectors, fuses, and re­lays.

The SAM Cab is available in different hardware models: Highline, Midline, and Baseline. Table 2 describes any
differences in pin functionality between these hardware models

Pinout Mapping

Connector Cavity Number

X1 1

X1 2 Hands-Free Phone, Ground Not Connected —

X1 3 Cabin HVAC Controller, Battery Cabin HVAC Controller, Battery —

X1 4 Hands-Free Phone, Ignition Not Connected —

X1 5 Heated Seats, Ground Not Connected —

X1 6 Sleeper HVAC Controller, Battery Sleeper HVAC Controller, Battery —

X1 7 Hands-Free Phone, Battery Not Connected —

X1 8

X1 9

X1 10

X1 11 Sleeper HVAC Controller, Ground Sleeper HVAC Controller, Ground —

X1 12 Heated Seats, Ignition Not Connected —

X1 13

Transmission temperature gauge,
Ignition

Auxiliary Circulation Fan,
Sleeper, Ground

Transmission Shift Control Panel,
Battery

Cabin HVAC Controller,
Accessory

Auxiliary Circulation Fan,
Sleeper, Battery

Highline Baseline Midline

Function

Transmission temperature gauge,
Ignition

Not Connected —

Transmission Shift Control Panel,
Battery

Cabin HVAC Controller, Accessory —

Not Connected —

—

—

Cascadia Troubleshooting Manual, March 2010 G02.04/9

G02.04 SAM Cab

Pinout Mapping

Connector Cavity Number

X1

X1 15

X2 1 Auxiliary Heater (ESPAR), Power Not Connected —

X2 2 MSF, Ground MSF, Ground —

X2 3 OBD J1939, Battery OBD J1939, Battery —

X2 4 VCU/CPC, Ignition VCU/CPC, Ignition —

X2 5

X2 6 Reserved for future use Reserved for future use —

X2 7

X2 8

X2 9 Diagnostic Connector, Ignition Diagnostic Connector, Ignition —

X2 10

X2 11 Diagnostic Connector, Ground 2 Diagnostic Connector, Ground 2 —

X2 12 MSF, Battery MSF, Battery —

X2 13

X2 14

X2 15

X2 16

X2 17

X2 18 Emergency Battery, Cab Emergency Battery, Cab —

X3 1

X3 2

X3 3

X3 4 Advertising Light, Accessory Not Connected —

X3 5 Standalone HVAC, Battery Standalone HVAC, Battery —

X3 6 SRS Airbag, Ignition Not Connected —

X3 7 Utility Light Utility Light —

14 Cabin HVAC Controller, Ground Cabin HVAC Controller, Ground —

Sleeper HVAC Controller,
Accessory

Area Lighting (Lower Bunk Area
and Sleeper Work Surface),
Ground

Starter relay output from Engine
Controller (Optimized Idle)

Diagnostic Connector, Ground 1
(GND1)

Hardwired ISS (Ignition Switch
Status), Cab

Collision Avoidance System,
Battery

Collision Avoidance System,
Ignition

Area Lighting (Lower Bunk Area
and Sleeper Work Surface),
Battery

Collision Avoidance System,
Ground

Auxiliary Heater (ESPAR),
Ground

GPS (Global Positioning
System), Battery

Antitheft Warning System,
Battery

12V Power Receptacle 4
(Sleeper, Cigar), Battery

Highline Baseline Midline

Function

Sleeper HVAC Controller, Accessory —

Area Lighting (Lower Bunk Area and
Sleeper Work Surface), Ground

Starter relay output from Engine
Controller (Optimized Idle)

Diagnostic Connector, Ground 1 (GND1) —

Hardwired ISS (Ignition Switch Status),
Cab

Not Connected —

Not Connected —

Area Lighting (Lower Bunk Area and
Sleeper Work Surface), Battery

Not Connected —

Not Connected —

Not Connected —

Not Connected —

12V Power Receptacle 4 (Sleeper,
Cigar), Battery

—

—

—

—

—

Cascadia Troubleshooting Manual, March 2010G02.04/10

SAM Cab G02.04

Pinout Mapping

Connector Cavity Number

X3

X3 9 Amplifier Power, Accessory Not Connected —

X3 10

X3 11 Radio, Battery Radio, Battery —

X3 12 Not Connected Not Connected —

X3 13 Standalone HVAC, Ground Standalone HVAC, Ground —

X3 14 SRS Airbag, Ground Not Connected —

X3 15

X3 16

X3 17 Amplifier Power, Ground Not Connected —

X3 18

X3 19 Radio, Ground Radio, Ground —

X3 20

X3 21 Utility Light, Ground Utility Light, Ground —

X4 1

X4 2

X4 3

X4 4

X5 1

X5 2

X5 3

X5 4

X6 1 CB Radio, Ground CB Radio, Ground —

X6 2

X6 3 CB Radio, Battery CB Radio, Battery —

X6 4 Instrument Cluster, Ground Instrument Cluster, Ground —

X6 5

8 Not Connected Not Connected —

GPS (Global Positioning
System), Ignition

12V Power Receptacle 3
(Sleeper, Cigar), Battery

CGW (Central Gateway ECU),
Ground

CGW (Central Gateway ECU),
Battery

Antitheft Warning System,
Ground

Power Feed Spare Output I,
Battery

Power Feed Spare Output III,
Battery

Power Feed Spare Output I,
Ground

Power Feed Spare Output III,
Ground

Power Feed Spare Output II,
Battery

Power Feed Spare Output IV,
Battery

Power Feed Spare Output II,
Ground

Power Feed Spare Output IV,
Ground

Fleet Management System,
Battery

Power Feed Driver Information
System, Ignition

Highline Baseline Midline

Function

Not Connected —

12V Power Receptacle 3 (Sleeper,
Cigar), Battery

CGW (Central Gateway ECU), Ground —

CGW (Central Gateway ECU), Battery —

Not Connected —

Power Feed Spare Output I, Battery —

Not Connected —

Power Feed Spare Output I, Ground —

Not Connected —

Power Feed Spare Output II, Battery —

Not Connected —

Power Feed Spare Output II, Ground —

Not Connected —

Fleet Management System, Battery —

Not Connected —

—

Cascadia Troubleshooting Manual, March 2010 G02.04/11

G02.04 SAM Cab

Pinout Mapping

Connector Cavity Number

X6 6

X6 7

X6 8

X6 9

X6 10

X6 11

X6 12 Power Feed Clock Cab, Battery Power Feed Clock Cab, Battery —

X6 13

X6 14

X6 15

X6 16 Instrument Cluster, Ignition Instrument Cluster, Ignition —

X6 17 Not Connected Not Connected —

X6 18 Instrument Cluster, Battery Instrument Cluster, Battery —

X7 1

X7 2 Cabin HVAC Fan Motor, Ground Cabin HVAC Fan Motor, Ground —

X7 3 Sleeper HVAC Fan Motor, Battery Sleeper HVAC Fan Motor, Battery —

X7 4 Cabin HVAC Fan Motor, Battery Cabin HVAC Fan Motor, Battery —

X8 1

X8 2 Mirror Heating Driver, Ground Mirror Heating Driver, Ground —

X8 3 Door Control Driver, Ground Door Control Driver, Ground —

X8 4 Door Control Driver, Battery Door Control Driver, Battery —

X8 5 Door Open Status ICU Input Door Open Status ICU Input —

X8 6 Door Lock, Battery Door Lock, Battery —

X8 7

X8 8 Mirror Heating Driver Mirror Heating Driver —

X8 9 Door Sill Lamp Driver Door Sill Lamp Driver —

X9 1

Fleet Management System,
Ignition

Fleet Management System,
Ground

Power Feed Gauge Pyrometer,
Ignition

12V Power Receptacle 2 (Dash,
Phone), Battery

Power Feed Gauge Axle
Temperature, Ignition

Power Feed Gauge Engine Oil
Temperature, Ignition

Power Feed Driver Information
System, Battery

Power Feed Clock Sleeper,
Battery

12V Power Receptacle 1 (Dash,
Cigar), Battery

Sleeper HVAC Fan Motor,
Ground

Door Open Driver Side Input Pull
Down

Power Window Driver Side,
Accessory

Body Builder Connector:
Revolution

Highline Baseline Midline

Function

Fleet Management System, Ignition —

Fleet Management System, Ground —

Not Connected —

12V Power Receptacle 2 (Dash, Phone),
Battery

Power Feed Gauge Axle Temperature,
Ignition

Power Feed Gauge Engine Oil
Temperature, Ignition

Not Connected —

Power Feed Clock Sleeper, Battery —

12V Power Receptacle 1 (Dash, Cigar),
Battery

Sleeper HVAC Fan Motor, Ground —

Door Open Driver Side Input Pull Down —

Power Window Driver Side, Accessory —

Not Connected —

—

—

—

—

Cascadia Troubleshooting Manual, March 2010G02.04/12

SAM Cab G02.04

Pinout Mapping

Connector Cavity Number

X9 2

X9 3 Function Pin 1 Function Pin 1 —

X9 4

X9 5 Function Pin 2 Function Pin 2 —

X9 6 Function Pin 4 Function Pin 4 —

X9 7 Function Pin 3 Function Pin 3 —

X9 8

X9 9

X9 10

X9 11 Body Builder Connector: Ignition Not Connected —

X9 12

X9 13

X9 14

X9 15

X10 1 Tire Pressure Monitoring, Ignition Not Connected —

X10 2

X10 3 Belt Buckle Contact Signal Not Connected —

X10 4 Panel Lamps, Ground Panel Lamps, Ground —

X10 5 Tire Pressure Monitoring, Ground Not Connected —

X10 6

X10 7

X10 8

X10 9

X10 10

X10 11

X10 12 Not Connected Not Connected —

Body Builder Connector: Vehicle
Speed

Body Builder Connector: Park
Brake

Body Builder Connector: Ground
1 (GND1)

Body Builder Connector: Backup
Lamp

Body Builder Connector: Marker
Lights

Body Builder Connector: Tail
Lights

Body Builder Connector: Right
Tu rn

Body Builder Connector: Left
Tu rn

Body Builder Connector: Stop
Lights

Inside Temperature Sensor,
Propeller Control, Accessory

Vehicle Power Shut Down Signal
(Optimized Idle)

Service Brake Pressure Switch,
Supply

Power Feed Sleeper Thermostat
(Optimized Idle), Ground

Inside Temperature Sensor,
Feedback

Power Feed Sleeper Thermostat
(Optimized Idle), Ignition

Inside Temperature Sensor/
Propeller, Ground

Highline Baseline Midline

Function

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Not Connected —

Inside Temperature Sensor, Propeller
Control, Accessory

Vehicle Power Shut Down Signal
(Optimized Idle)

Service Brake Pressure Switch, Supply —

Power Feed Sleeper Thermostat
(Optimized Idle), Ground

Inside Temperature Sensor, Feedback —

Power Feed Sleeper Thermostat
(Optimized Idle), Ignition

Inside Temperature Sensor/Propeller,
Ground

—

—

—

—

—

Cascadia Troubleshooting Manual, March 2010 G02.04/13

G02.04 SAM Cab

Pinout Mapping

Connector Cavity Number

X10

X10 14

X10 15 Belt Buckle Contacts, Ground Not Connected —

X10 16 Tire Pressure Monitoring, Battery Not Connected —

X10 17 Instrument Cluster, HL Wake Up Instrument Cluster, HL Wake Up —

X10 18 Radio, Accessory Radio, Accessory —

X11 1

X11 2 Washer Level ICU Indicator Washer Level ICU Indicator —

X11 3

X11 4

X11 5

X11 6

X11 7 Lights On Buzzer Lights On Buzzer —

X11 8 Air Filter Restriction ICU Indicator Air Filter Restriction ICU Indicator —

X11 9 High Beam ICU Indicator High Beam ICU Indicator —

X11 10 Rain / Light Sensor, Ground Not Connected —

X11 11 Turn Signal Left ICU Indicator Turn Signal Left ICU Indicator —

X11 12

X11 13 Turn Signal Right ICU Indicator Turn Signal Right ICU Indicator —

X11 14 Park Brake Switch ICU Indicator Park Brake Switch ICU Indicator —

X11 15 Rain / Light Sensor, LIN Not Connected —

X11 16 Clutch Switch Return, Ground Clutch Switch Return, Ground —

X11 17

X11 18 Auxiliary Telematic Unit, Ground Not Connected —

X11 19 Auxiliary Telematic Unit, Battery Not Connected —

X11 20 Bottom of Clutch (Starter Control) Bottom of Clutch (Starter Control) —

X11 21 Rain / Light Sensor, Battery Not Connected —

X12 1

X12 2

X12 3 Footwell Light Footwell Light —

13 Panel Lamps Panel Lamps —

Inside Temperature Sensor,
Ground

Differential Lock ICU Indicator,
RA2

Electrical Global Fault Indicator
(Future Use)

Fuel Water Separator ICU
Indicator

Differential Lock ICU Indicator,
RA1

Low Air Pressure Switch ICU
Indicator

Alternator No Charge ICU
Indicator

Top of Clutch (Cruise Control
Disable)

Rear Baggage Compartment
Light Switch Center

Rear Baggage Compartment
Light Switch Left

Highline Baseline Midline

Function

Inside Temperature Sensor, Ground —

Not Connected —

Electrical Global Fault Indicator (Future
Use)

Not Connected —

Differential Lock ICU Indicator, RA1 —

Low Air Pressure Switch ICU Indicator —

Alternator No Charge ICU Indicator —

Top of Clutch (Cruise Control Disable) —

Rear Baggage Compartment Light
Switch Center

Rear Baggage Compartment Light
Switch Left

—

—

—

Cascadia Troubleshooting Manual, March 2010G02.04/14

SAM Cab G02.04

Pinout Mapping

Connector Cavity Number

X12

X12 5

X12 6

X12 7 Not Connected Not Connected —

X12 8

X12 9 General Sleeper Lamp General Sleeper Lamp —

X12 10 Footwell Light, Ground Footwell Light, Ground —

X12 11 General Sleeper Lamp, Ground General Sleeper Lamp, Ground —

X12 12

X12 13 Not Connected Not Connected —

X12 14

X12 15 Turn Left Front Side Turn Left Front Side —

X12 16

X12 17 Dome Lamp, Rear Dome Lamp, Rear —

X12 18 Turn Right Front Side Turn Right Front Side —

X13 1 Not Connected Not Connected —

X13 2 SAM Cab, Cabin CAN Low (-) SAM Cab, Cabin CAN Low (-) —

X13 3 SAM Cab, Cabin CAN High (+) SAM Cab, Cabin CAN High (+) —

X13 4 Ignition Switch - Off Not Connected —

X13 5 Ignition Switch - Accessory Ignition Switch - Accessory —

X13 6 Ignition Switch - On (Ignition) Ignition Switch - On (Ignition) —

X13 7 Ignition Switch - Battery Ignition Switch - Battery —

X13 8 Park Brake Switch Feedback Park Brake Switch Feedback —

X13 9 Park Brake Switch Supply Park Brake Switch Supply —

X13 10

X13 11 Low Air Pressure Switch Supply Low Air Pressure Switch Supply —

X13 12

X13 13

X13 14 Start Enable - Crank Interlock Not Connected —

X13 15 Ignition Switch - Crank Ignition Switch - Crank —

4 Dome Lamps Sleeper, Ground Dome Lamps Sleeper, Ground —

Rear Baggage Compartment
Light Switch Right

Reading Lamp 1 (Dimmable /
Theater)

Reading Lamps 1 & 2 (Dimmable
/ Theater), Ground

Rear Baggage Compartment
Lights

Rear Baggage Compartment
Lights, Ground

Reading Lamp 2 (Dimmable /
Theater)

Low Air Pressure Switch
Feedback

Service Brake Pressure Switch
Feedback

Horn Switch uC (microcontroller)
Bypass

Highline Baseline Midline

Function

Rear Baggage Compartment Light
Switch Right

Reading Lamp 1 (Dimmable / Theater) —

Reading Lamps 1 & 2 (Dimmable /
Theater), Ground

Rear Baggage Compartment Lights —

Rear Baggage Compartment Lights,
Ground

Reading Lamp 2 (Dimmable / Theater) —

Low Air Pressure Switch Feedback —

Service Brake Pressure Switch
Feedback

Horn Switch uC (microcontroller) Bypass —

—

—

—

—

Cascadia Troubleshooting Manual, March 2010 G02.04/15

G02.04 SAM Cab

Pinout Mapping

Connector Cavity Number

X14 1

X14 2

X14 3

X14 4

X15 1

X15 2

X15 3

X15 4

X16 1 CD Player, Battery Not Connected —

X16 2 Lane Guidance, Ignition Not Connected —

X16 3 Lane Guidance, Ground Not Connected —

X16 4 Clearance Lamps Front II Clearance Lamps Front II —

X16 5

X16 6 CD Player, Ground Not Connected —

X16 7 Dome Lamp Cab, Battery Dome Lamp Cab, Battery —

X16 8 Clearance Lamps Front I Clearance Lamps Front I —

X16 9 Clearance Lamps Front, Ground Clearance Lamps Front, Ground —

X16 10 Not Connected Not Connected —

X16 11

X16 12 Reading Lamps 3 & 4, Ground Reading Lamps 3 & 4, Ground —

X16 13 Reading Lamp 4, Battery Reading Lamp 4, Battery —

X16 14 Dome Lamp, Passenger Dome Lamp, Passenger —

X16 15 Dome Lamps, Forward, Ground Dome Lamps, Forward, Ground —

X16 16 Spot Light Spot Light —

X16 17

X16 18

X17 1

X17 2 Mirror Heating Passenger Mirror Heating Passenger —

12V Power Receptacle 5
(Sleeper, Cigar), Battery

12V Power Receptacle 6
(Sleeper, Refrigerator), Battery

12V Power Receptacles 3 & 4,
Ground

12V Power Receptacles 5 & 6,
Ground

Power Feed Spare Output V,
Battery

Power Feed Spare Output VI,
Battery

Power Feed Spare Output V,
Ground

12V Power Receptacles 1 & 2,
Ground

Auxiliary Circulation Fan ­Windshield, Accessory

Dome Lamp, Driver / Forward
Overhead

Overhead Compartment Lights,
Battery

Auxiliary Circulation Fan ­Windshield, Ground

Power Window Passenger Side,
Accessory

Highline Baseline Midline

Function

12V Power Receptacle 5 (Sleeper,
Cigar), Battery

12V Power Receptacle 6 (Sleeper,
Refrigerator), Battery

12V Power Receptacles 3 & 4, Ground —

12V Power Receptacles 5 & 6, Ground —

Not Connected —

Not Connected —

Not Connected —

12V Power Receptacles 1 & 2, Ground —

Not Connected —

Dome Lamp, Driver / Forward Overhead —

Overhead Compartment Lights, Battery —

Not Connected —

Power Window Passenger Side,
Accessory

—

—

—

Cascadia Troubleshooting Manual, March 2010G02.04/16

SAM Cab G02.04

Pinout Mapping

Connector Cavity Number

X17

X17 4 Door Control Passenger, Battery Door Control Passenger, Battery —

X17 5

X17 6

X17 7

X17 8

X17 9 Door Control Passenger, Ground Door Control Passenger, Ground —

X18 1

X18 2

X18 3 Horn (Electric), Ground Horn (Electric), Ground —

X18 4

X18 5 Low Beam, Left Low Beam, Left —

X18 6 High Beam, Left High Beam, Left —

X18 7

X18 8

X18 9 Turn Right Front Corner Turn Right Front Corner —

X18 10

X18 11

X18 12 Marker Lamps, Front Right Marker Lamps, Front Right —

X18 13

X18 14 Marker Lamps, Front Left Marker Lamps, Front Left —

X18 15

X18 16 Marker Lamps, Corner Front Left Marker Lamps, Corner Front Left —

X18 17 High Beam, Right High Beam, Right —

X18 18

X18 19 Turn Left Front Corner Turn Left Front Corner —

X18 20 Low Beam, Right Low Beam, Right —

3 Door Sill Lamp Passenger Door Sill Lamp Passenger —

Door Open Passenger Side,
Input

Keyless Go / Keyless Entry,
Ground

Keyless Go / Keyless Entry,
Battery

Mirror Heating Passenger,
Ground

Marker Lamps, Front Left,
Ground

Headlamp, Turn Lamp Corner
Right, Ground

Marker Lamps, Corner Front
Right, Ground

Headlamp, Turn Lamp Corner
Left, Ground

Marker Lamps, Corner Front
Right

Marker Lamps, Front Right,
Ground

Hood Tilt Switch Signal
(Optimized Idle)

Marker Lamps, Corner Front
Left, Ground

DRL (Daytime Running Lights),
Right

DRL (Daytime Running Lights),
Left

Highline Baseline Midline

Function

Door Open Passenger Side, Input —

Not Connected —

Not Connected —

Mirror Heating Passenger, Ground —

Marker Lamps, Front Left, Ground —

Headlamp, Turn Lamp Corner Right,
Ground

Marker Lamps, Corner Front Right,
Ground

Headlamp, Turn Lamp Corner Left,
Ground

Marker Lamps, Corner Front Right —

Marker Lights, Front Right, Ground —

Hood Tilt Switch Signal (Optimized Idle) —

Marker Lamps, Corner Front Left,
Ground

DRL (Daytime Running Lights), Right —

DRL (Daytime Running Lights), Left —

—

—

—

—

Cascadia Troubleshooting Manual, March 2010 G02.04/17

G02.04 SAM Cab

Pinout Mapping

Connector Cavity Number

X18

X19 1 Activate PTO Solenoid, Ground Not Connected —

X19 2 Starter Relay, Ground Starter Relay, Ground —

X19 3 Starter Relay Starter Relay —

X19 4 Not Connected Not Connected —

X19 5 Not Connected Not Connected —

X19 6 A/C Compressor Clutch A/C Compressor Clutch —

X19 7 Not Connected Not Connected —

X19 8 Not Connected Not Connected —

X19 9 Activate PTO Solenoid, Control Not Connected —

X19 10

X19 11

X19 12

X19 13

X19 14 Hood Tilt Switch Signal Supply Hood Tilt Switch Signal Supply —

X19 15

X19 16

X19 17

X19 18 Engine ECU, Ignition Engine ECU, Ignition —

X19 19 PTO Response (Feedback) Not Connected —

X19 20 Ether Start Power, Ignition Ether Start Power, Ignition —

X19 21 PTO Solenoid Activated Not Connected —

X20 1 Fog Lamp, Front Right, Ground Fog Lamp, Front Right, Ground —

X20 2

X20 3 Fog Lamp, Front Left, Ground Fog Lamp, Front Left, Ground —

X20 4

X20 5

X20 6 Not Connected Not Connected —

X20 7 Washer Pump, Ground Washer Pump, Ground —

X20 8 Fog Lamp, Front Left Fog Lamp, Front Left —

21 Horn (Electric), Control Horn (Electric), Control —

HVAC Pressure Transducer,
Feedback

Air Intake Warmer / Grid Heater,
Ignition

HVAC Pressure Transducer,
Return

Air Filter Restriction Sensor,
Ignition

Air Filter Restriction Sensor,
Signal

Hood Tilt & Neutral & Park Brake
(Optimized Idle)

HVAC Pressure Transducer,
Supply (+5V)

Distance Sensor (Adaptive
Cruise Control), Ground

High / Low Beam Auxiliary Right,
Ground

High / Low Beam Auxiliary Left,
Ground

Highline Baseline Midline

Function

HVAC Pressure Transducer, Feedback —

Not Connected —

HVAC Pressure Transducer, Return —

Air Filter Restriction Sensor, Ignition —

Air Filter Restriction Sensor, Signal —

Hood Tilt & Neutral & Park Brake
(Optimized Idle)

HVAC Pressure Transducer, Supply
(+5V)

Not Connected —

High / Low Beam Auxiliary Right,
Ground

High / Low Beam Auxiliary Left, Ground —

—

—

—

Cascadia Troubleshooting Manual, March 2010G02.04/18

SAM Cab G02.04

Pinout Mapping

Connector Cavity Number

X20

X20 10 High Beam Auxiliary, Left Not Connected —

X20 11 Low Beam Auxiliary, Left Low Beam Auxiliary, Left —

X20 12 High Beam Auxiliary, Right Not Connected —

X20 13

X20 14 Low Beam Auxiliary, Right Low Beam Auxiliary, Right —

X20 15 Turn Right Front Side Turn Right Front Side —

X20 16

X20 17 Fog Lamp, Front Right Fog Lamp, Front Right —

X20 18

X20 19

X20 20 Washer Pump, Control Washer Pump, Control —

X20 21 Washer Fluid Level, Feedback Washer Fluid Level, Feedback —

X21 1 Horn (Pneumatic), Ground Not Connected —

X21 2 Not Connected Not Connected —

X21 3 Wiper, Ground Wiper, Ground —

X21 4 Not Connected Not Connected —

X21 5 Utility Light, Ground Utility Light, Ground —

X21 6 LVD Sense, Ground LVD Sense, Ground —

X21 7 Not Connected Not Connected —

X21 8 Alternator Charging, Feedback Alternator Charging, Feedback —

X21 9 Wiper Parked Wiper Parked —

X21 10 Horn (Pneumatic), Control Not Connected —

X21 11 Turn Left Front Side Turn Left Front Side —

X21 12 Wiper Low Wiper Low —

X21 13

X21 14 Utility Light Utility Light —

X21 15 Wiper High Wiper High —

9 Not Connected Not Connected —

Temperature Sensor Outside Air
Gauge, Ignition

Temperature Sensor Outside Air,
Feedback

Temperature Sensor Outside Air,
Ground

Distance Sensor (Adaptive
Cruise Control), Battery

LVD Sense, Battery / Emergency
Supply

Highline Baseline Midline

Table 2, Pinout Mapping

Function

Temperature Sensor Outside Air Gauge,
Ignition

Temperature Sensor Outside Air,
Feedback

Temperature Sensor Outside Air, Ground —

Not Connected —

LVD Sense, Battery / Emergency Supply —

—

—

Cascadia Troubleshooting Manual, March 2010 G02.04/19

G02.04 SAM Cab

603 — Fuse Mapping

Fuse Mapping

Fuse Fuse Name Rating Connection Pin Function

F1 PWR FD SPARE 1&3 30

F2

F3 PWR FD SPARE 2&4 30

F4

F5 OBD J1939-BAT 10

F6 DASH PWR RCPT 1 15 X6 15

F7 DASH PWR RCPT 2 15 X6 9

F8 PHONE/RADIO-BAT 15

F9 AMPLIFIER PWR 20 X3 9 Amplifier Power, ACC

F10 CAB HVAC MTR 30 X7 4 Cabin HVAC fan motor, BAT

F11 SLPR HVAC MTR 30 X7 3 Sleeper HVAC fan motor, BAT

F12 DR CTRL L 20 X8 4 Door control driver, BAT

F13 DR LOCK/SM CRUISE 20

F14 FTL MGM SYS and CB 25

F15 SLPR PWR RCPT 3 20 X3 15

F16 STAND ALONE HVAC 7.5 X3 5 Stand Alone HVAC, BAT

F17 SLPR PWR RCPT 4 20 X3 3

F18

F19 HEATED SEAT 20 X1 12 Heated Seats, IGN

F20 CENTRAL GATEWAY 2 X3 18 CGW, BAT

CAB/SLPR HVAC

CTRL/SHF PNL

MODULAR SWITCH

FIELD

TELEMATICS/

WARNING SYS

15

15 X2 12 MSF, BAT

15

X4 1 Power Feed Spare Output I, BAT

X4 2 Power Feed Spare Output III, BAT

X1 3 Cabin HVAC controller, BAT

X1 6 Sleeper HVAC controller, BAT

X1 9

X5 1 Power Feed Spare Output II, BAT

X5 2 Power Feed Spare Output IV, BAT

X2 3 OBD J1939, BAT

X2 6 OBD DCDI, BAT

X1 7 Hands-free phone, BAT

X3 11 Radio, BAT

X2 13 Collision avoidance system, BAT

X8 6 Door lock, BAT

X6 2 Fleet Management System, BAT

X6 3 CB Radio, BAT

X3 1 GPS, BAT

X3 2 Antitheft warning system, BAT

X10 16 Tire Pressure Monitoring, BAT

X11 19 Auxiliary Telematic Unit, BAT

Transmission shift control panel,
BAT

12V Power Receptacle 1 BAT
(Dash, Cigar)

12V Power Receptacle 2 BAT
(Dash, Phone)

12V Power Receptacle 3 BAT
(Sleeper, Cigar)

12V Power Receptacle 4 BAT
(Sleeper, Cigar)

Cascadia Troubleshooting Manual, March 2010G02.04/20

SAM Cab G02.04

Fuse Mapping

Fuse Fuse Name Rating Connection Pin Function

F21 AREA LIGHT 15 X2 15

F22 ICU-BAT 5 X6 18

X3 10 GPS, IGN

X6 5

X6 6 Fleet Management System, IGN

F23 DR INFO/GAUGE 15

F24 ICU-IGN 10

F26 SRS-AIRBACK 5 X3 6 SRS Airbag, IGN

F27 MIRROR HEAT L 10 X8 8 Mirror Heat, Driver

F28 MIRROR HEAT R 10 X17 2 Mirror Heat, Passenger

F29 SAM RELAY COILS 3 N/A N/A Internal Relay Coil Supply

F30 PWR RCPT 6/FRIG 20 X14 2

F31 SLPR PWR RCPT 5 20 X14 1

F32 PWR FD SPARE 5&6 25

F33 SPOT LIGHT 20 X16 16 Spot Light

F34 BAG COMP LIGHT 3 X16 17

F35 DOMELAMP CAB 15 X16 7 Dome Lamp Cab, BAT

F36

AUX CIR FAN/RD

LAMP

15

X6 8

X6 10

X6 11

X2 9 Diagnostic Connector, IGN

X6 16 Instrument Cluster, IGN

X1 1 Trans Temp Gauge, IGN

X1 4 Dash Splice, IGNF25 DASH SPLICE PAK 7.5

X2 14 Collision Avoidance System, IGN

X15 1 Power feed spare output V, BAT

X15 2 Power feed spare output VI, BAT

X1 13

X16 13 Reading Lamp 4 BAT

Area Lighting BAT (Lwr Bunk and
Sleeper Work Surface)

Instrument Cluster / Horn switch
supply, BAT

Power Feed Driver Information
System, IGN

Power Feed Gauge Pyrometer,
IGN

Power Feed Gauge Axle Temp,
IGN

Power Feed Gauge Engine Oil
Temp, IGN

12V Pwr Recept 6 BAT (Sleeper,
Refrigerator)

12V Power Receptacle 5 BAT
(Sleeper, Cigar)

Overhead Compartment Light,
BAT

Auxiliary Circulation Fan (Sleeper)
BAT

Cascadia Troubleshooting Manual, March 2010 G02.04/21

G02.04 SAM Cab

Fuse Mapping

Fuse Fuse Name Rating Connection Pin Function

X6

X6 13

F37

F38 DR CTRL R 20 X17 4 Door control passenger, BAT

F39 PWR WINDOW R 15 X17 1

F40 PWR WINDOW L 15 X8 7 Power Window Driver Side, ACC

CLK/DRV INFO/CD/

KEYLESS

15

Table 3, Fuse Mapping

X6 14

X16 1 CD-Player, BAT

X17 7 Keyless Go /Keyless Entry, BAT

604 — Relay Mapping

12 Power Feed Clock Cab, BAT

Power Feed Driver Information
System, BAT

Power Feed Clock sleeper, BAT ­X6/14

Power Window Passenger Side,
ACC

Relay Relay Name

PWR FD
SPARE 1&3,

R1

BAT

PWR FD
SPARE 2&4,

R2

BAT

HEAT SEAT,

R3

IGN

DASH PWR
RCPT 1&2,

R4

BAT

FLT MGM
SYS & CB,

R5

BAT

PWR RCPT
3 & STD

R6

HVAC, BAT

Relay Coil

(low current side)

Control (-)

(86)

SAM Micro

SAM Micro

SAM Micro

SAM Micro

SAM Micro

SAM Micro

Control (+)

(85)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

Relay Mapping

Relay

(high current side)

Common

(30)

Batt NC F1 X4

Batt NC F3 X5

Batt NO F19 X1 12 Heated Seats, IGN

Batt NC

Batt NC F14 X6

Batt NC

Type

Suppl.

Pwr To

F15 15

F16

Conn. Pin Circuits Supplied

Power Feed Spare

1

Output I - BAT

Power Feed Spare

2

Output III - BAT

Power Feed Spare

1

Output II, BAT

Power Feed Spare

2

Output IV, BAT

F6 15

X6

F7

X3

12V Power Receptacle
1 BAT (Dash, Cigar)

12V Power Receptacle

9

2 BAT (Dash, Phone)

3 CB Radio BAT

Fleet Management

2

System BAT

12V Power Receptacle
3 BAT (Sleeper, Cigar)

5 Stand Alone HVAC

Cascadia Troubleshooting Manual, March 2010G02.04/22

SAM Cab G02.04

Relay Mapping

Relay Relay Name

DRV
INFOGAUGE,

R7

IGN

ICU/
VEHICLE

R8

SYS, IGN

AMPLIFIER

R9

PWR, ACC

MIRROR

R10

HEAT

PWR RCPT

R11

6/FRIG, BAT

PWR RCPT

R12

5, BAT

CAB
LIGHTING,

R13

BAT

Relay Coil

(low current side)

Control (-)

(86)

SAM Micro

SAM Micro

SAM Micro

SAM Micro

SAM Micro

SAM Micro

SAM Micro

Control (+)

(85)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

F29 (batt

power)

Common

(30)

Batt NO F23

Batt NO

Batt NO F9 X3 9 Amplifier Power, ACC

Batt NO

Batt NC F30 X14 2

Batt NC F31 X14 1

Batt NC

Relay

(high current side)

Type

Suppl.

Pwr To

Conn. Pin Circuits Supplied

X3

X6

X2 9

F24

X6 16

X1 1

X1 4 Dash Splice, IGNF25

X2 14

F26 X3 6 SRS Airbag, IGN

F27 X8 8 Mirror Heat, Driver

F28 X17 2 Mirror Heat, Passenger

F21 X2 15

F34 X16 17

F35 X16 7 Dome Lamp Cab, BAT

10 GPS, IGN

Power Feed Driver
Information System,

5

IGN

Fleet Management

6

System, IGN

Power Feed Gauge

8

Pyrometer, IGN

Power Feed Gauge

10

Axle Temp, IGN

Power Feed Gauge

11

Engine Oil Temp, IGN

Diagnostics Connector,
IGN

Instrument Cluster,
IGN

Transmission Temp
Gauge, IGN

Collision Avoidance
System, IGN

12V Power Receptacle
6 BAT (Sleeper,
Refrigerator)

12V Power Receptacle
5 BAT (Sleeper, Cigar)

Area Lighting BAT
(Lower Bunk Area and
Sleeper Work Surface)

Overhead
Compartment Light,
BAT

Cascadia Troubleshooting Manual, March 2010 G02.04/23

G02.04 SAM Cab

Relay Mapping

Relay Coil

Relay Relay Name

PWR RCPT4/
CIR FAN/

R14

LAMP, BAT

PWR
WINDOW,

R15

ACC

(low current side)

Control (-)

(86)

SAM Micro

SAM Micro

Control (+)

(85)

F29 (batt

power)

F29 (batt

power)

Table 4, Relay Mapping

700 — Troubleshooting Overview

Common

(30)

Batt NC

Batt NO

Relay

(high current side)

Type

Suppl.

Pwr To

Conn. Pin Circuits Supplied

F17 X3 3

F36

F39 X17 1

F40 X8 7

X1 13

X16 13 Reading Lamp 4, BAT

12V Power Receptacle
4 BAT (Sleeper, Cigar)

Auxiliary Circulation
Fan, Sleeper, BAT

Power Window
Passenger Side, ACC

Power window Driver
Side, ACC

IMPORTANT: If the symptom is specific to a function or system (left low beam headlight does not
function, for example), refer to the applicable subject in this manual.

In ServiceLink, use the CAN protocol to troubleshoot or configure the SAM Cabin, via the Diagnostic CAN
datalink. See 601 — Component Details for the Diagnostic CAN pins in the diagnostic connector.

For more information on the Diagnostic CAN datalink or CAN, see G03.04 — Datalink, Diagnostic CAN.

701 — Required Tools

• ServiceLink

702 — Possible Causes

• Wiring (bad/loose connection, corrosion, miswiring, etc)

• SAM Cab relays

• SAM Cab fuses

• SAM Cab parameters

• SAM Cab ECU software

• Cabin CAN datalink

• Other ECUs on the Cabin CAN datalink

• Diagnostic CAN datalink

Cascadia Troubleshooting Manual, March 2010G02.04/24

SAM Cab G02.04

703 — Fault Codes

CAN Fault, SAM Cab

SA SPN

33

33 168 4

33 520901 4

33 521109 2

33 521109 3

33 521109 4

33 521217 2

168 3

FMI

Electrical potential (voltage) – voltage
above normal or shorted to high.

Electrical potential (voltage) – voltage
below normal or shorted to low.

Door open driver side, pull down – voltage
below normal, or shorted to low source.

Inside temperature sensor, feedback –
data erratic, intermittent, or incorrect.

Inside temperature sensor feedback –
voltage above normal, or shorted to high
source.

Inside temperature sensor, feedback –
voltage below normal, or shorted to low
source.

Clutch – data erratic, intermittent, or
incorrect.

Fault Description Fault Trigger

Trigger:

above normal, or shorted to high.

Action:

Cab, and alternator charging wiring.

Trigger:

below normal, or shorted to low.

Action:

Cab, and alternator charging wiring.

Trigger:

detected to be shorted to ground, or low source.

Action:

Trigger:

temperature sensor feedback pin.

Vehicle Behavior:

incorrect.

Action:

loose connections. Check the inside temperature
sensor feedback pin.

Trigger:

pin is shorted to battery, or high source.

Vehicle Behavior:

temperature is incorrect.

Possible Cause:

temperature sensor feedback is shorted to
battery. Or, the inside temperature sensor is out
of order and shortens to battery.

Action:

temperature sensor feedback. Check the inside
temperature sensor.

Trigger:

pin is shorted to ground, or low source.

Vehicle Behavior:

temperature is incorrect.

Possible Cause:

temperature sensor feedback is shorted to
ground. Or, the inside temperature sensor is out
of order and shortens pin to ground.

Action:

temperature sensor feedback. Check the sensor
inside temperature sensor.

Trigger:
Possible Cause:

(starter control)’ and ’Top of clutch (cruise control
disable)’ are detected to be pressed at the same
time. Or, the feed cable to ’Bottom of Clutch’ and/
or feed cable to ’Top of Clutch’ has a short circuit.

Action:

Clutch switch (starter control), and ’Top of Clutch
switch (cruise control disable), and check clutch
wiring.

SAM Cab battery voltage sensed to be

Check power feed wiring to the SAM

SAM Cabin battery voltage sensed to be

Check power feed wiring to the SAM

Driver side door open, pull down pin

Check the wiring harness.

A problem is detected with the inside

Data is erratic, intermittent, or

Check the wiring harness, especially for

The inside temperature sensor feedback

The displayed inside

The feed cable to the inside

Check the wiring to the inside

The inside temperature sensor feedback

The displayed inside

The feed cable to the inside

Check the wiring to the inside

A problem is detected with the clutch.

The switches ’Bottom of clutch

Check the feed cables to ’Bottom of

Cascadia Troubleshooting Manual, March 2010 G02.04/25

G02.04 SAM Cab

CAN Fault, SAM Cab

SA SPN

33

521402 3

33 521402 4

33 521403 3

33 521403 4

33 521805 4

33 521918 4

FMI

CAN low – voltage above normal, or
shorted to high source.

CAN low – voltage below normal, or
shorted to low source.

CAN high – voltage above normal, or
shorted to high source.

CAN high – voltage below normal, or
shorted to low source.

Door open, passenger side, pull down –
voltage below normal, or shorted to low
source.

DRL – voltage below normal, or shorted to
low source.

Fault Description Fault Trigger

Trigger:

is shorted to battery, or high source.

Vehicle Behavior:

with the Cabin CAN datalink, SAM Cab and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

connection to the SAM Cab. Verify proper
connection of the Cabin CAN harness to the SAM
Cab.

Trigger:

is shorted to ground, or low source.

Vehicle Behavior:

with the Cabin CAN datalink, SAM Cab and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

connection to the SAM Cab. Verify proper
connection of the Cabin CAN harness to the SAM
Cab.

Trigger:

is shorted to battery, or high source.

Vehicle Behavior:

with the Cabin CAN datalink, SAM Cab and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

connection to the SAM Cab. Verify proper
connection of the Cabin CAN harness to the SAM
Cab.

Trigger:

is shorted to ground, or low source.

Vehicle Behavior:

with the Cabin CAN datalink, SAM Cab and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

connection to the SAM Cab. Verify proper
connection of the Cabin CAN harness to the SAM
Cab.

Trigger

pin detected to be shorted to ground, or low
source.

Action:

Trigger:

are detected to be shorted to ground, or low
source. One or more of the DRL lamps are off.

Action:

The Cabin CAN Low (–) pin of SAM Cab

In the case of a serious error

Check Cabin CAN harness, especially in

The Cabin CAN Low (–) pin of SAM Cab

In the case of a serious error

Check Cabin CAN harness, especially in

The Cabin CAN High (+)pin of SAM Cab

In the case of a serious error

Check Cabin CAN harness, especially in

The Cabin CAN High (+)pin of SAM Cab

In the case of a serious error

Check Cabin CAN harness, especially in

: Door open, passenger side. Pull-down

Check the wiring harness.

DRL pins (for separate DRL lamps only)

Check the wiring harness.

Cascadia Troubleshooting Manual, March 2010G02.04/26

SAM Cab G02.04

CAN Fault, SAM Cab

SA SPN

33

522003 4

33 523511 31

33 523541 2

33 523550 7

33 524037 31 Lost communication with CGW

FMI

Starter relay 3 – current above normal or
grounded circuit.

Cabin CAN Bus Performance – condition
exists.

Marker interrupt switch – data erratic,
intermittent, or incorrect.

Park position switch – mechanical system
is not responding, or is out of adjustment

Fault Description Fault Trigger

Trigger:

above normal current, or shorted to ground.

Vehicle Behavior:

started.

Possible Cause:
Action:

Trigger:

performance.

Vehicle Behavior:

problem with the Cabin CAN datalink, the SAM
Cab and/or SAM Chassis may be running in
emergency power mode.

Action:

Trigger:

interrupt switch, and may be detected to be
pressed for longer than 30 seconds.

Vehicle Behavior:

is not working properly.

Action:

the MSF.

Trigger:

park position switch, causing the wiper to stop.

Possible Cause:

or defective wiper, or the wiper switch is not
working.

Trigger:

messages from the CGW.

Possible Cause:

Cabin CAN datalink and the CGW, or a blown
CGW power supply fuse on the SAM Cab.

Action:

Cabin CAN connection to CGW, and the CGW
power supply.

Starter relay 3 pin detected to have

The vehicle can no longer be

A wiring harness problem.

Check the starter relay circuit wiring.

A problem is detected with Cabin CAN

In the case of a serious

Check Cabin CAN wiring.

A problem is detected with the marker

The marker interrupt function

Check the steering wheel switch unit, and

A problem is detected with the wiper

The wiring harness, a blocked

The SAM Cab did not receive heartbeat

A bad connection between the

Check the wiring harness, especially the

Cascadia Troubleshooting Manual, March 2010 G02.04/27

G02.04 SAM Cab

CAN Fault, SAM Cab

SA SPN

33

524049 31 Lost communication with MSF

33 524071 31 Lost communication with the SAM Chassis

FMI

Fault Description Fault Trigger

Trigger:

messages from the MSF.

Vehicle Behavior

on for safety. All functions where input switches
are controlled by the MSF do not function, such
as Turn and Hazard functions, rotary switch
(headlamp) functions and wiper.

Possible Cause:

connection problem to MSF, or the MSF power
supply fuse on SAM Cab is blown.

Action:

Cabin CAN connection to the MSF, and the MSF
power supply.

Trigger:

messages from the SAM Chassis.

Vehicle Behavior:

outputs may be behaving according to
Emergency Power Mode for a SAM Chassis
failure. An indication of a SAM Chassis failure is
the ICU turn signal indicators flash alternately.

Possible Cause:

connection to the SAM Chassis, or the power
supply to the SAM Chassis.

Action:

especially the Cabin CAN connection to the SAM
Chassis. Check the SAM Chassis power supply.

Table 5, CAN Fault, SAM Cab

The SAM Cab did not receive heartbeat

: Headlights automatically turn

A Cabin CAN datalink

Check the wiring harness, especially the

The SAM Cab did not receive heartbeat

SAM Cab and SAM Chassis

The Cabin CAN datalink

Check the Cabin CAN wiring harness,

Cascadia Troubleshooting Manual, March 2010G02.04/28

SAM Cab G02.04

704 — Grounded Pins and Inputs

12

V From

Megafuse

GNDTo

Battery

INPUT PINS

)
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he

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k

ar

ar

ar

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M

M

M

H

−

−

−

−

4

7

10

13

/

/

/

/

X18

X18

X18

X18

INTERNAL SAM PC BOARD

6

8

8

5

2

/
X1

!

ND

ree Phone G
F
s

and
H

2

5

/

/

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ND

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G

,

s

t

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t

−

ea

an

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t
ula

c
ir
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y

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x

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8

/

/

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11

14

11

16

17

13

14

/

/

/

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X2

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,

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G

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r

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enger

enger

hield

w

s

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ss

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s

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p

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t

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t

m

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on

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D

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c

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Au

07/02/2007

GROUNDED PINS

Ref. Dia. SAM _CAB grounds.inputs small page.vsd

(X1−X17)

f545099

Fig. 7, Grounded Pins and Inputs

Cascadia Troubleshooting Manual, March 2010 G02.04/29

G02.04 SAM Cab

705 — Fused and FET Controlled Outputs

LOGIC CONTROLLED UNFUSED OUTPUTS

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v

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t

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&

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H

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−

−

−

−

−

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3

6

9

14

17

/

/

/

/

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/

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X19

X19

X19

X19

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t

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t

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m

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8

10

11

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X20

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15

17

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ft

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iper

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H

T

W

U

W

W

−

−

−

−

−

−
10

11

12

14

15

20

/

/

/

/

/

/

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X21

X21

X21

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Megafuse

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ion pin 4

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5

6

7

9

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12

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15

18

16

17

19

20

21

/

/

/

/

/

/

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X18

X18

X18

X18

X18

X18

X18

INTERNAL SAM PC BOARD

2(15A)

5(10A)

4(15A)

8(15A)

F

10 (30A)F11 (30A)F12 (20A)F13 (20A)

F

F

F

F

18 (15A)

20 (2A)F22 (5A)

F

32 (25A)

F

F

37 (15A)

33 (20A)
F

38 (20A)

F

F

4

/

10

15

/

3

3

6

6

9

/

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/

/

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12

/

X1

X2

X2

X1

X1

X2

−

−

−

−

−

−

T

T

T

T

T

T

BA

BA

BA

BA

BA

,

BA

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,

,

I,

,
F
S

roller

1939

roller

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t

M

J

on
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VA

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abin
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D DCD

on

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c

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OB

on
c

VA

ft

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hi
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ion
ss

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m
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ran
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3

4

7

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11

/

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X1

X3

−

−

−
T

T

T

BA

BA

,

,

BA
,

or

t
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m

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an

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C

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and

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abin
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6

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2

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f
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VA
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13

19

16

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X8

X3

X3

X2

−

−

−

−
X11

X10

−
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16

12

14

13

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X6

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X17

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X16

−

−

−

−

−

−

T

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BA

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Po

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eed
F

er
w

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FUSED BATTERY PASSTHROUGHS

/

4

/

X2

X1

X1

−

−

−

X17

N

−

G

CC

CC

T

,I

A

A

C

,

,

BA

P

,

C

/

roller

roller

t

t

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enger

on

on

V

c

c

ss

C

C

VA

VA

rol pa

H

H

t
on

c

abin
C

oor

Sleeper

D

UNFUSED CONST

* When specified with Optimized Idle, these pins will not supply power when the key is in the ACC position,

nor during an Optimized Idle vehicle shutdown event. Optimized Idle is specified by a SAM Cab parameter.

02/25/2010

Fig. 8, Fused and FET Controlled Outputs

7

4

2

1

/

/

/

X3

X10

X10

−

−

−
N

CC

CC

G

A

A

,I

t,

t
s

oring

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ing Ligh

oni

s

i

t

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irror Adju

er

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on

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ire Pre
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,

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ide

s

n

I

9

2

7

/

18

10

21

/

/

/

X10

X10

X11

X10

−

−

−

−

T

T

N

CC

G

I

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A

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,

,

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f
r
w
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5

/

/

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/

11

/

X13

X13

X16

X16

X13

−

−

−

−

−

T

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N

N

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G

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BA

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19

13

11

18

20

13

/

/

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/

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X20

X20

X19

X19

X19

X19

−

−

−

−

−

−
T

N

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c

m
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an

t

T

s

i
D

ANT OUTPUTS

Ref. Dia. SAM _CAB outputs small.vsd

f545100

Cascadia Troubleshooting Manual, March 2010G02.04/30

SAM Cab G02.04

706 — Relayed Outputs

N
G

igar)
C
,

Phone)

h

T

T

BA

BA
tI,

tIII,

pu

pu

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F

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w

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Po

Po

−

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1

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BA

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V

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pu

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Po

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X5

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12

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Po

Po

F

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−

−

−

−

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6

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10

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/

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F

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87

86

85

87

a

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)
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F

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a

87

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R

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)
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F

85

86

87

a

87

30

R

4

INTERNAL

o

)
A

7(15
F

85

86

)
A

14 (25
F

a

87

30

SAM PC

BOARD

Battery

R

9

86

30

87a87

85

)
A

9(20
F

9

/
X3

−

CC
A
,

er
w

ier Po

f
pli
m

A

* When specified with Optimized Idle, these pins will not supply power when the key is in the ACC position,

nor during an Optimized Idle vehicle shutdown event. Optimized Idle is specified by a SAM Cab parameter.

02/25/2010

)
A

27 (10
F

R

10

86

30

87a87

85

)
A

28 (10
F

8

2

/

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85

87

87

86

5

30

a

87

87

85

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A

35 (15
F

7

/
17

/

X16
X16

−

−

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T

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BA

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t,

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C

p

Ligh
t

m
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m

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v

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85

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R

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86

30

87

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A

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87

30

86

R

R

15

86

a

85

)

)

A

A

39 (15

40 (15

F

F

1

/

13

13

/

/

X1

X17

X16

−

−

−

T

T

CC
A
,

p4BA
m

enger Side

an (Sleeper) BA
F

ss

eading La

Pa

ion

R

t

w

ula
c
ir

indo

C

W

y

er
w

iliar
x

Po

Au

Ref. Dia. SAM_CAB_relays Small.vsd

86

7

7

/
X8

−

CC
A
,

er Side
v
ri

wD

indo
W
er

w
Po

85

30

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)

)

A

A

5

.

24 (10

25 (7

F

F

85

87

a

87

86

30

R

8

INTERNAL

SAM

WIRING

)
A

26 (5
F

f545102

Fig. 9, Relayed Outputs

Cascadia Troubleshooting Manual, March 2010 G02.04/31

G02.04 SAM Cab

707 — Logic Controlled Unfused Outputs

INPUTS

09/18/2007

Fig. 10, SAM Unfused Inputs and Outputs

1. Determine if the template has I/O controls available for the affected function.

Open the Datalink Monitor template for the function or output that is not functioning.

Are I/O control buttons available for the affected function?

!

YES

NO

2. Use the I/O control feature in Datalink Monitor to test the output circuit.

Does the function or output work when activated with Datalink Monitor?

YES

NO

3. Use Datalink Monitor to determine if input conditions are met for the function or output to operate.

Are all of the input conditions met?

Go to test 2.

!

Go to test 5.

!

Go to test 3.

!

Go to test 4.

SAM Cab

OUTPUT

f545127

!

YES

specific to this function, refer to the applicable subject in this manual. If programming/parameters are OK,
replace the SAM Cab.

NO

manual.

4. Rule out the output by manually applying fused power and ground.

Does the function or output work when power and ground are applied manually?

YES

NO

bleshooting, refer to the applicable subject in this manual.

5. Determine if input conditions are met for the function or output to operate using Datalink Monitor.

Check SAM Cab programming and parameters. For additional programming/parameter information

!

For additional input troubleshooting specific to this function, refer to the applicable subject in this

!

Replace the SAM Cab.

!

The problem is in the output power or ground circuits, or the load itself. For additional output trou-

NOTE: To determine which Datalink Monitor template to use, refer to the applicable subject in this
manual.

G02.04/32

Cascadia Troubleshooting Manual, March 2010

SAM Cab G02.04

5.1 Refer to the function or output in this manual to identify what input conditions have to be met in or­der for the function or output to operate.

5.2 Open the Datalink Monitor template for the applicable function.

5.3 While monitoring the template inputs, attempt to activate the function or output using the normal
method. Turn on the headlights, for example, if the rotary switch inputs are being tested.

Are all of the input conditions met?

YES

!

Go to test 6.

!

NO

manual.

6. Check available voltage at the consumer.

NOTE: Available voltage tests cannot be performed on every SAM Cab function. For example,
checking voltage at a turn signal connector will not work. Refer to the applicable subject in this
manual for more details about troubleshooting specific outputs. If test 6 cannot be performed, pro­ceed to test 7.

6.1 Disconnect the connector at the consumer.

For additional input troubleshooting specific to this function, refer to the applicable subject in this

6.2 Activate the function by normal means. Turn on the headlights, for example, if the rotary switch in­puts are being tested.

6.3 Measure voltage between the positive and ground pins on the connector for the function being tested.

Is there battery voltage across the positive and ground terminals?

!

YES

NO

7. Rule out the output by manually applying fused power and ground.

7.1 Disconnect the SAM connector(s) containing the circuits for the output (power) and ground for the

7.2 Apply fused power to the output circuit using jumper wires, and apply ground to the ground circuit.

Does the function or output work when power and ground are applied manually?

YES

mation, refer to the applicable subject in this manual. If the programming and parameters are OK, replace
the SAM Cab.

NO

bleshooting, refer to the applicable subject in this manual.

Replace the consumer.

!

Go to test 7.

function being tested.

!

Check SAM Cab programming and parameters. For additional programming and parameter infor-

!

The problem is in the output power or ground circuits, or the load itself. For additional output trou-

Cascadia Troubleshooting Manual, March 2010 G02.04/33

G02.04 SAM Cab

708 — Logic Controlled Relayed Fused Outputs

SAM Cab

INPUTS

09/18/2007

1. Determine if the template has I/O controls available for the affected function.

Open the Datalink Monitor template for the function or output that is not functioning.

Are I/O control buttons available for the affected function?

!

YES

NO

2. Use Datalink Monitor to determine if the output circuit can be eliminated as the problem.

Go to test 2.

!

Go to test 3.

Internal Sam
Circuit Board

Fig. 11, SAM Fused Inputs and Outputs

Relay

Fuse

OUTPUT

NOTE: To determine which Datalink Monitor template to use, refer to the applicable subject in this
manual.

2.1 Open the Datalink Monitor template for the applicable function.

f545126

2.2 Using the template, attempt to activate the function or output.

Does the function or output work when activated manually in Datalink Monitor?

NOTE: For normally closed relays, activating the SAM output will turn off the relay controls. For normally
open relays, activating the SAM output will turn on the relay controls.

!

YES

NO

3. Use Datalink Monitor to determine if input conditions are met for the function or output to operate.

Go to test 3.

!

Go to test 4.

NOTE: To determine which Datalink Monitor template to use, refer to the applicable subject in this
manual.

G02.04/34

Cascadia Troubleshooting Manual, March 2010

SAM Cab G02.04

3.1 Refer to the applicable function or output, and identify what input conditions have to be met for nor­mal operation.

3.2 Open the applicable Datalink Monitor template.

3.3 While monitoring the template inputs, attempt to active the function or output using the normal
method. For example, turn on the headlights if the rotary switch inputs are being tested.

Are all of the input conditions met?

YES

!

Go to test 4.

!

NO

manual.

4. Check the available voltage at the consumer.

NOTE: Available voltage tests cannot be performed on every SAM function. For example, checking
voltage at a turn signal connector will not work. Refer to the applicable subject for more informa­tion about troubleshooting the specific outputs. If test 4 cannot be performed, proceed to test 5.

4.1 Disconnect the connector at the consumer.

4.2 Activate the function by normal means. For example, turn on the headlights if the rotary switch in-

For additional input troubleshooting specific to this function, refer to the applicable subject in this

puts are being tested.

4.3 Measure voltage between the positive and ground pins.

Is there battery voltage across the positive and ground terminals?

!

YES

NO

5. Check for power at the relay coil (low current side).

5.1 Remove the relay from the SAM for the function that is not working.

5.2 Check for voltage in the SAM relay cavity that corresponds to terminal 85 of the relay.

Is there voltage at relay cavity 85?

YES

NO

6. Check for power at the relay common (high current side).

Check for voltage in the SAM relay cavity that corresponds to terminal 30 of the relay.

Is there voltage at relay cavity 30?

YES

NO

7. Check the SAM fuse for the function.

Check the fuse for the function or output.

Replace the consumer.

!

Go to test 5.

!

Go to test 6.

!

Check fuse F29 on the SAM Cab.

!

Go to test 7.

!

Check main power to SAM from the MEGA fuse.

Is the fuse good?

!

YES

Cascadia Troubleshooting Manual, March 2010 G02.04/35

Go to test 8.

G02.04 SAM Cab

NO

!

Check for a short to ground in the output circuit. Check the component that the output supplies

power to for excessive current draw. Make repairs as necessary, and replace the fuse.

8. Determine if the function works when power is manually applied.

Using a fused jumper, apply power to the SAM relay cavity that corresponds to 87 for normally open relay
connections, or 87a for normally closed relays.

Does the function work when power is manually applied at the relay?

!

YES

NO

bleshooting, refer to the applicable subject in this manual.

9. Determine if the output works with a test relay that is operating properly.

Remove the relay from the SAM and install the known good relay.

Does the function or output work with a known good relay?

YES

NO

to the applicable subject in this manual. If programming and parameters are OK, replace the SAM.

Go to test 9.

!

The problem is in the output power or ground circuits, or the load itself. For additional output trou-

!

Replace the relay.

!

Check SAM programming and parameters. For additional programming/parameter information, refer

709 — Unfused Constant Outputs

SAM Cab

09/19/2007

Fig. 12, SAM Unfused Constant Outputs

1. Check available voltage at the consumer.

1.1 Disconnect the connector at the consumer.

1.2 Measure the voltage between the positive and ground pins on the connector.

Is there battery voltage across the positive and ground terminals?

!

YES

NO

2. Check the voltage at output pin.

Replace the consumer.

!

Go to test 2.

OUTPUT

f545125a

2.1 Turn the ignition switch on.

G02.04/36

Cascadia Troubleshooting Manual, March 2010

SAM Cab G02.04

2.2 Check for voltage at the unfused constant output pin.

Is there 12V at the unfused constant output pin?

!

YES

bleshooting refer to the applicable subject in this manual.

NO

and ground feeds to the SAM. If OK, replace the SAM.

710 — Fused Battery Pass-Through Outputs

The problem is in the output power or ground circuits or the load itself. For additional output trou-

!

For IGN and ACC outputs, check for ignition switch function. For all types, check the main power

BATT

SAM Cab

Fuse

09/19/2007

Fig. 13, Fused Battery Pass-Through Outputs

OUTPUT

1. Check the fuse in the SAM for the output.

Is the fuse OK?

!

YES

NO

Go to test 2.

!

Check for short to ground in the output circuit, repair as necessary, and then replace the fuse. For

additional output troubleshooting, refer to the applicable subject in this manual.

2. Check power and ground supply to the SAM.

Is power and ground supply to the SAM OK?

!

YES

The problem is in the output power or ground circuits, or the load itself. For additional output trou-

bleshooting, refer to the applicable subject in this manual.

!

NO

Check the MEGA fuse, and the power and ground circuits to the SAM. Repair as necessary.

800 — Maximum Current Pin List

Legend:

f545128a

NOTE: A dash indicates that information is not available at the time of publication.

• Type:

– "o" Pin: A high-side-driven output (the function activates at higher or near-battery voltage).

– "i" Pin: Input pin.

– "comm" Pin: Used for communication.

Cascadia Troubleshooting Manual, March 2010

G02.04/37

G02.04 SAM Cab

• Nominal Current (amps): The expected current under normal operating conditions.





F (25

• Maximum Continuous Current (amps): The maximum current without shutting the pin off at 77





F (85

• Maximum Current (amps): When exceeded the pin will shut off at 185

Maximum Current Pin List

Nominal

Connector Pin Function Type

X1

X1 3 Cabin HVAC Controller, Battery o 5 6.75 15

X1 4 Hands-Free Phone, Ignition o 3 4.05 7.5

X1 6 Sleeper HVAC Controller, Battery o 3 4.05 15

X1 7 Hands-Free Phone, Battery o 3 4.05 15

X1 9 Transmission Shift Control Panel, Battery o 1 1.35 15

X1 10 Cabin HVAC Controller, Accessory o 0.7 0.945 1.9

X1 12 Heated Seats, Ignition o 16 21.6 20

X1 13 Auxiliary Circulation Fan, Sleeper, Battery o 5 6.75 25

X1 15 Sleeper HVAC Controller, Accessory o 0.7 0.945 1.9

X2 3 OBD J1939, Battery o 5 6.75 10

X2 6 Reserved for future use. o 5 6.75 10

X2 7

X2 9 Diagnostic Connector, Ignition o 5 6.75 10

X2 10 Hardwired ISS (Ignition Switch Status), Cab o 0.02 0.027 —

X2 12 MSF (Modular Switch Field master ECU), Battery o 10 13.5 15

X2 13 Collision Avoidance System, Battery o 5 6.75 20

X2 14 Collision Avoidance System, Ignition o 1.07 1.4445 7.5

X2 15

X2 18 Emergency Battery, Cab o 20 27 —

X3 1 GPS (Global Positioning System), Battery o 3.21 4.3335 15

X3 2 Antitheft Alarming System, Battery o 2 2.7 15

X3 3 12V Power Receptacle 4 (sleeper, cigar), Battery o 20 27 20

X3 4 Advertising Light, Accessory o 4.8 6.48 9.35

X3 5 Stand Alone HVAC, Battery o 5 6.75 7.5

X3 6 SRS (Safety Restraint System) Airbag, Ignition o 3 4.05 5

X3 7 Utility Light o 12.6 17.01 25

X3 9 Amplifier Power, Accessory o 20 27 20

X3 10 GPS (Global Positioning System), Ignition o 1.07 1.4445 15

1 Transmission oil temperature gauge, Ignition o 0.5 0.675 7.5

Starter Relay Output from Engine-ECU
(Optimized Idle)

Area Lighting (lower bunk area and sleeper work
surface), Battery

Current

(Amps)

i 0.02 0.027 —

o 9.7 13.095 15

C).

Maximum

Continuous

Current
(Amps)

Maximum

Current

(Amps)

C).

Cascadia Troubleshooting Manual, March 2010G02.04/38

SAM Cab G02.04

Maximum Current Pin List

Nominal

Connector Pin Function Type

X3

X3 18 CGW (Central Gateway ECU), Battery o 0.38 0.513 2

X4 1 Power Feed Spare Output I, Battery o 15 20.25 30

X4 2 Power Feed Spare Output III, Battery o 15 20.25 30

X5 1 Power feed Spare Output II, Battery o 15 20.25 30

X5 2 Power Feed Spare Output IV, Battery o 15 20.25 30

X6 2 Fleet Management System, Battery o 5 6.75 25

X6 3 CB Radio, Battery o 20 27 25

X6 5 Power Feed, Driver Information System, Ignition o 1.07 1.4445 15

X6 6 Fleet Management System, Ignition o 5 6.75 15

X6 8 Power Feed, Gauge Pyrometer, Ignition o 0.5 0.675 15

X6 9 12V Power Receptacle 2 (Dash, Phone), Battery o 15 20.25 15

X6 10 Power Feed, Gauge Axle Temperature, Ignition o 0.5 0.675 15

X6 11 Power Feed, Gauge Engine Oil Temp, Ignition o 0.5 0.675 15

X6 12 Power Feed, Clock Cab, Battery o 0.1 0.135 15

X6 13 Power Feed, Driver Information System, Battery o 3 4.05 15

X6 14 Power Feed, Clock Sleeper, Battery o 0.1 0.135 15

X6 15 12V Power Receptacle 1 (dash, cigar), Battery o 15 20.25 15

X6 15 12V Power Receptacle 3 (sleeper, cigar), Battery o 20 27 20

X6 16 Instrument Cluster, Ignition o 4.6 6.21 10

X6 18 Instrument Cluster, Battery o 3.78 5.103 5

X7 3 Sleeper HVAC Fan Motor, Battery o 26 35.1 30

X7 4 Cabin HVAC Fan Motor, Battery o 26 35.1 30

X8 1 Door Open, Driver side, Pull Down i 0.04 0.054 —

X8 4 Door Control Driver, Battery o 20 27 20

X8 5 Door Open Status o 0.04 0.054 0.5

X8 6 Door Lock, Battery o 12.4 16.74 20

X8 7 Power Window Driver Side, Accessory o 10 13.5 15

X8 8 Mirror Heating Driver o 10 13.5 10

X8 9 Door Sill Lamp Driver o 0.7 0.945 1.9

X9 1 Body Builder Connector: Revolution o 0.01 0.0135 1

X9 2 Body Builder Connector, Vehicle Speed o 0.01 0.0135 1

X9 3 Function pin 1 o 0.2 0.27 2

X9 4 Body Builder Connector, Park Brake o 0.04 0.054 2

X9 5 Function Pin 2 o 0.2 0.27 2

11 Radio, Battery o 10 13.5 15

Current

(Amps)

Maximum

Continuous

Current

(Amps)

Maximum

Current

(Amps)

Cascadia Troubleshooting Manual, March 2010 G02.04/39

G02.04 SAM Cab

Maximum Current Pin List

Nominal

Connector Pin Function Type

X9

X9 7 Function Pin 3 o 0.2 0.27 2

X9 9 Body Builder Connector, Backup Lamp o 0.2 0.27 2

X9 10 Body Builder Connector, Marker Lights o 0.2 0.27 2

X9 11 Body Builder Connector: Ignition o 0.2 0.27 2

X9 12 Body Builder Connector: Tail Lights o 0.2 0.27 2

X9 13 Body Builder Connector: Right Turn o 0.2 0.27 2

X9 14 Body Builder Connector: Left Turn o 0.2 0.27 2

X9 15 Body Builder Connector: Stop Lights o 0.2 0.27 2

X10 1 Tire Pressure Monitoring, Ignition o 0.1 0.135 2

X10 2

X10 3 Belt Buckle Contact Signal i 0.04 0.054 —

X10 6 Vehicle Power Shut Down Signal (Optimized Idle) i 0.02 0.027 —

X10 7 Service Brake Pressure Switch Supply (chopped) o 0.05 0.0675 2

X10 9 Inside Temperature Sensor, Feedback i 0.04 0.054 —

X10 10

X10 12 Not Connected i 0.04 0.054 —

X10 13 Panel Lamps o 4.2 5.67 9.35

X10 16 Tire Pressure Monitoring, Battery o 2 2.7 15

X10 17 Wake-up, ICU (instrumentation control unit) o 0.04 0.054 2

X10 18 Radio, Accessory o 0.7 0.945 2

X11 1 Differential Lock ICU Indicator, RA2 o 0.13 0.1755 2

X11 2 Washer Level ICU Indicator o 0.13 0.1755 2

X11 3 Electrical Global Fault Indicator (future use) o 0.13 0.1755 2

X11 5 Differential Lock ICU Indicator, RA1 o 0.13 0.1755 2

X11 6 Low Air Pressure switch ICU Indicator o 0.13 0.1755 2

X11 7 Lights ON Buzzer o 0.03 0.0405 2

X11 8 Air Filter Restriction ICU Indicator o 0.13 0.1755 2

X11 9 High Beam ICU Indicator o 0.13 0.1755 2

X11 11 Turn Signal Left ICU Indicator o 0.13 0.1755 2

X11 12 Alternator No Charge ICU Indicator o 0.13 0.1755 2

X11 13 Turn Signal Right ICU Indicator o 0.13 0.1755 2

X11 14 Park Brake Switch ICU Indicator o 0.13 0.1755 2

6 Function Pin 4 o 0.2 0.27 2

Inside Temperature Sensor, Propeller Control,
Accessory

Power Feed, Sleeper Thermostat (Optimized
Idle), Ignition

Current

(Amps)

o 0.1 0.135 2

o 0.04 0.054 1.7

Maximum

Continuous

Current
(Amps)

Maximum

Current

(Amps)

Cascadia Troubleshooting Manual, March 2010G02.04/40

SAM Cab G02.04

Maximum Current Pin List

Nominal

Connector Pin Function Type

X11

X11 17 Top of Clutch (cruise control disable) i 0.02 0.027 —

X11 19 Auxiliary Telematic Unit, Battery o 3.21 4.3335 20

X11 20 Bottom of Clutch (starter control) i 0.02 0.027 —

X11 21 Rain/Light Sensor, Battery o 1 1.35 3.2

X12 1 Rear Baggage Compartment Light Switch Center i 0.02 0.027 —

X12 2 Rear Baggage Compartment Light Switch Left i 0.02 0.027 —

X12 3 Footwell Light o 1.1 1.485 2.8

X12 5 Rear Baggage Compartment Light Switch Right i 0.02 0.027 —

X12 6 Reading Lamp 1 (dimmable/theater) o 1.9 2.565 4.3

X12 9 General Sleeper Lamp o 2.8 3.78 9.3

X12 12 Rear Baggage Compartment Lights o 1.5 2.025 3.5

X12 15 Turn Left, Front Side o 2.1 2.835 4.66

X12 16 Reading Lamp 2 (dimmable/theater) o 1.5 2.025 3.5

X12 17 Dome Lamp, Rear o 1.9 2.565 4.66

X12 18 Turn Right Front Side o 2.1 2.835 3.5

X13 2 SAM Cab, Cabin CAN Low (–) comm 0.2 0.27 0.2

X13 3 SAM Cab, Cabin CAN High (+) comm 0.2 0.27 0.2

X13 4 Ignition Switch — Off i 0.02 0.027 —

X13 5 Ignition Switch — Accessory i 0.02 0.027 —

X13 6 Ignition Switch — On (ignition) i 0.02 0.027 —

X13 7 Ignition Switch, Battery o 0.1 0.135 0.2

X13 8 Park Brake Switch Feedback i 0.05 0.0675 —

X13 9 Park Brake Switch Supply o 0.05 0.0675 2

X13 10 Low Air Pressure Switch Feedback i 0.05 0.0675 —

X13 11 Low Air Pressure Switch Supply (chopped) o 0.05 0.0675 2

X13 12 Service Brake Pressure Switch Feedback i 0.05 0.0675 —

X13 13 Horn Switch (microcontroller bypass) i 0.02 0.027 —

X13 14 Start Enable — Crank Interlock i 0.04 0.054 —

X14 1 12V Power Receptacle 5 (sleeper, cigar), Battery o 20 27 20

X14 2

X15 1 Power Feed Spare Output V, Battery o 10 13.5 25

X15 2 Power Feed Spare Output VI, Battery o 10 13.5 25

X16 1 CD Player, Battery o 2 2.7 15

15 Rain/Light Sensor, LIN comm 0.2 0.27 —

12V Power Receptacle 6 (sleeper, refrigerator),
Battery

Current

(Amps)

o 20 27 20

Maximum

Continuous

Current

(Amps)

Maximum

Current

(Amps)

Cascadia Troubleshooting Manual, March 2010 G02.04/41

G02.04 SAM Cab

Maximum Current Pin List

Nominal

Connector Pin Function Type

X16

X16 5

X16 7 Dome Lamp Cab, Battery o 10 13.5 15

X16 8 Clearance Lamps front I o 0.5 0.675 1.9

X16 11 Dome Lamp, Driver (forward overhead) o 1.9 2.565 9.35

X16 13 Reading Lamp 4, Battery o 3.5 4.725 15

X16 14 Dome Lamp, Passenger o 1.9 2.565 9.35

X16 16 Spot Light o 17 22.95 20

X16 17 Overhead Compartment Lights, Battery o 1.94 2.619 3

X17 1 Power Window Passenger Side, Accessory o 10 13.5 15

X17 2 Mirror heating Passenger o 10 13.5 10

X17 3 Door Sill Lamp Passenger o 0.7 0.945 1.9

X17 4 Door Control Passenger, Battery o 20 27 20

X17 5 Door Open Passenger Side, Input i 0.04 0.054 —

X17 7 Keyless Go/Keyless Entry, Battery o 5 6.75 15

X18 5 Low Beam, Left o 4.8 6.48 9.3

X18 6 High Beam, Left o 4.8 6.48 10.3

X18 8 Marker Lamps, Corner Front Right o 0.7 0.945 1.7

X18 9 Turn Right Front Corner o 2.5 3.375 4.66

X18 11 Hood Tilt Switch Signal (Optimized Idle) i 0.04 0.054 —

X18 12 Marker Lamps, Front Right o 0.7 0.945 1.7

X18 14 Marker Lamps, Front Left o 0.7 0.945 1.7

X18 15 DRL (daytime running light), Right o 2.5 3.375 4.2

X18 16 Marker Lamps, Corner Front Left o 0.7 0.945 1.7

X18 17 High Beam, Right o 4.8 6.48 10.3

X18 18 DRL (daytime running light), Left o 2.5 3.375 4.2

X18 19 Turn Left Front Corner o 2.5 3.375 4.2

X18 20 Low Beam, Right o 4.8 6.48 9.3

X18 21 Horn (electric), Ground o 12.2 16.47 24.2

X19 3 Starter Relay o 3 4.05 9.35

X19 6 A/C Compressor Clutch o 5 6.75 9.35

X19 9 Activate PTO Solenoid, Control o 2 2.7 4.66

X19 10 HVAC Pressure Transducer, Feedback i 0.05 0.0675 —

X19 11 Air Intake Warmer/Grid Heater, Ignition o 2.2 2.97 9.35

2 Lane Guidance, Ignition o 5 6.75 9.35

Auxiliary Circulation Fan — Windshield,
Accessory

Current

(Amps)

o 5 6.75 9.35

Maximum

Continuous

Current
(Amps)

Maximum

Current

(Amps)

Cascadia Troubleshooting Manual, March 2010G02.04/42

SAM Cab G02.04

Maximum Current Pin List

Nominal

Connector Pin Function Type

X19

X19 14

X19 15 Air Filter Restriction Sensor, Signal i 0.02 0.027 —

X19 16

X19 17 HVAC Pressure Transducer, Supply (+5V) o 0.05 0.0675 0.1

X19 18 Engine ECU, Ignition o 0.8 1.08 1.9

X19 19 PTO Response (Feedback) i 0.02 0.027 —

X19 20 Ether Start Power, Ignition o 1.5 2.025 4.66

X19 21 PTO Solenoid Activated o 2 2.7 4.66

X20 8 Fog Lamp, Front Left o 4.8 6.48 10.5

X20 10 High Beam Auxiliary, Left o 4.8 6.48 10.5

X20 11 Low Beam Auxiliary, Left o 4.8 6.48 10.5

X20 12 High Beam Auxiliary, Right o 4.8 6.48 10.5

X20 13 Temperature Sensor Outside Air Gauge, Ignition o 0.5 0.675 1.7

X20 14 Low Beam Auxiliary, Right o 4.8 6.48 10.2

X20 15 Turn Right, Front Side o 2.1 2.835 3.5

X20 16 Temperature Sensor Outside Air, Feedback i 0.04 0.054 —

X20 17 Fog Lamp, Front Right o 4.8 6.48 10.5

X20 19

X20 20 Washer Pump, Control o 4.6 6.21 10.5

X20 21 Washer Fluid Level, Feedback i 0.04 0.054 —

X21 8 Alternator Charging i 0.04 0.054 —

X21 9 Wiper Parked i 0.02 0.027 —

X21 10 Horn (pneumatic), Control o 0.75 1.0125 1.5

X21 11 Turn Left Front Side o 2.1 2.835 4.66

X21 12 Wiper Low o 9 12.15 18.5

X21 13 LVD Sense, Battery/Emergency Supply i 20 27 —

X21 14 Utility Light o 12.6 17.01 25

X21 15 Wiper High o 13 17.55 26.7

13 Air Filter Restriction Sensor, Ignition o 0.02 0.027 2

Hood Tilt Switch Signal Supply (Optimized Idle,
Chopped)

Hood Tilt and Neutral and Park Brake (Optimized
Idle)

Distance Sensor (Adaptive Cruise Control),
Battery

Table 6, SAM Cab Maximum Current Pin List

Current

(Amps)

o 0.05 0.0675 2

o 0.04 0.054 2

o 1 1.35 20

Maximum

Continuous

Current

(Amps)

Maximum

Current

(Amps)

Cascadia Troubleshooting Manual, March 2010 G02.04/43

SAM Chassis G02.05

Table of Contents

System Overview

Terms and Abbreviations .............................................................. 500

General Information .................................................................. 501

Fuses and Relays ................................................................... 502

Datalink Connections ................................................................. 503

Diagnostic CAN Datalink .............................................................. 504

Functional Messaging and ECU Troubleshooting ............................................ 505

ECU Configuration ................................................................... 506

Datalink Network Topology . ............................................................ 507

Components

Component Locations ................................................................ 600

Component Details .................................................................. 601

Pinout Mapping ..................................................................... 602

Fuse Mapping ...................................................................... 603

Relay Mapping ...................................................................... 604

Troubleshooting

Troubleshooting Overview ............................................................. 700

Required Tools ...................................................................... 701

Possible Causes .................................................................... 702

Fault Codes ........................................................................ 703

Fused and Relayed Outputs . ........................................................... 704

Unfused Outputs, Grounded Pins, and Inputs .............................................. 705

Logic Controlled Unfused Outputs ....................................................... 706

Logic Controlled Relayed Fused Outputs .................................................. 707

Unfused Constant Outputs ............................................................. 708

Fused Battery Pass-Through Outputs .................................................... 709

Cascadia Troubleshooting Manual, March 2010

SAM Chassis G02.05

500 — Terms and Abbreviations

Baud rate—The rate at which data is transmitted in bits per second.

Cabin CAN—A proprietary datalink connecting certain ECUs on the vehicle, specifically the CGW, MSF, SAM

Cab, and SAM Chassis.

CAN—Controller Area Network

CAN ID—The identifier for a specific message, which also contains the source address of the sending ECU

communicating on the J1939 datalink.

CGW—Central Gateway

Communication Protocol—A set of rules governing communication between electronic devices.

Datalink—A collection of wires, connecting system components, through which data is transmitted.

Datalink Topology—The arrangement in which the nodes (ECUs) of a datalink are connected to each other.

Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW.

Diagnostic Connector—A 9-pin diagnostic connector is used for troubleshooting the electrical system.

EAPU—Electric Air Processing Unit

FMI—Failure Mode Indicator. The part of a J1587, J1939, and CAN fault code that identifies how part of a de-

vice, or item on a device, failed.

I/O Controls—Input/Output controls allow a technician to activate and deactivate an input or output pin for trou-

bleshooting purposes. I/O controls appear on ServiceLink templates as buttons, typically labeled "ON" and
"OFF."

MSF—Modular Switch Field

NO—Normally Open

NC—Normally Closed

Off-board tool—Typically refers to a PC-based application that communicates with the vehicle datalinks via a

connection to the diagnostic connector.

Parameter—A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows

the customer to choose how that particular feature or function will work on the vehicle.

PDM—Power Distribution Module

SA—Source Address; indicates numeric assignment for a device that communicates on J1939.

SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related func-

tionality. See G02.04 — SAM Cab for more information.

SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related function-

ality.

SPN—Suspect Parameter Number. The part of a J1939 or CAN fault code that identifies how part of a device, or

item on a device, failed.

WIF—Water In Fuel

Cascadia Troubleshooting Manual, March 2010 G02.05/1

G02.05 SAM Chassis

501 — General Information

The SAM Chassis is an ECU (Electronic Control Unit). "SAM" stands for "Signal Detect and Actuation Module."

The SAM Chassis works closely with the SAM Cab to control much of the vehicle functionality. The SAM Chas­sis controls most of the chassis functions, and the SAM Cab controls most of the cab functions.

This ECU uses inputs (such as switches, sensors, and datalink messages), and drives many outputs (such as
lights, motors, and solenoids). See 601 — Component Details for complete pin information.

To understand a particular function or system that the SAM Chassis controls, see the applicable subject in this
manual. These subjects contain details about the way the function should work, as well as crucial information
such as inputs, outputs, interlocks, any related parameters for that particular function, and any other ECUs or
components that are a part of that function.

502 — Fuses and Relays

See 601 — Component Details for fuse and relay information.

For more information on the power distribution system, see G02.01 — Electrical System and Main PDM

Overview.

503 — Datalink Connections

The SAM Chassis is connected directly to the Cabin CAN datalink. Cabin CAN wires run from the SAM Chassis
to the starpoint connector, where it joins the rest of the Cabin CAN datalink.

See G03.03 — Datalink, Cabin CAN for details.

504 — Diagnostic CAN Datalink

When an off-board tool, such as ServiceLink, is connected to the vehicle, it communicates with the Cabin CAN
ECUs via the Diagnostics CAN datalink; there is no accessible service port to the Cabin CAN. The CGW trans­lates between the Diagnostics CAN and Cabin CAN datalink, due to the different speed and message formats of
the two datalinks.

505 — Functional Messaging and ECU Troubleshooting

To communicate with the ECU, a different set of messages is used by the off-board tool during troubleshooting
than the set of messages used during normal operation.

The set of messages used during normal operation is referred to as functional messages, which are sent cycli­cally on the Cabin CAN datalink. However, the set of messages (protocol) used during troubleshooting is referred
to as Control Area Network (CAN), which operates on a request-and-response basis over the Diagnostic CAN
datalink.

Any fault reported on the Cabin CAN is translated to Diagnostics CAN by the CGW, and can be displayed when
requested by an off-board tool, such as ServiceLink. Similarly, an off-board tool is able to display input and out­put pin status information, software interlocks, and allows a user to control inputs or outputs for troubleshooting.
This information is displayed in ServiceLink’s Datalink Monitor (DLM) templates.

506 — ECU Configuration

The diagnostic protocol used for troubleshooting or configuring the SAM Chassis is the Control Area Network
(CAN). For more information on CAN, see G03.04 — Datalink, Diagnostic CAN.

Cascadia Troubleshooting Manual, March 2010G02.05/2

SAM Chassis G02.05

The SAM Chassis has parameters that can be viewed or changed for vehicle configuration.

The SAM Chassis software can be flashed using ServiceLink, which will flash to its same version or upgrade, if
required.

The software flashing procedure should only be performed on the SAM Chassis in the following cases:

• As a last resort: Troubleshooting has narrowed the problem down to being at the SAM Chassis itself and
no other mechanical or electrical causes for the symptom have been identified. As a last resort, flashing
the SAM Chassis software with the same version may help in the case it became corrupt during the
course of normal vehicle operation.

• For a feature upgrade: Adding a new feature to a vehicle may require a newer version of ECU software.
ServiceLink will automatically make available any necessary software upgrades.

• Fixing a problem in the existing software: In case a new version of ECU software is needed to fix a
problem in the existing ECU software, ServiceLink will automatically make available any necessary soft­ware upgrades.

• Replacing the SAM Chassis: Flashing ensures that the most recent software is on the installed ECU.

For instructions on how to use ServiceLink to flash the software of a CAN ECU like the SAM Chassis, refer to

ServiceLink User Guide or ServiceLink Help user documentation, available in ServiceLink’s "Help" menu.

the

Cascadia Troubleshooting Manual, March 2010 G02.05/3

G02.05 SAM Chassis

507 — Datalink Network Topology

Cascadia Network Topology

Sub Bus

Slave Switch

Control Panels

Head Lamp

Switch

Diagnostic CAN

(500kbps)

SAM Cab

SAM Chassis

Modular Switch

Field (Master)

Standard

Optional

Cabin CAN

(125kbps)

Steering Wheel

Switches

Stalk Switch

(Steering

Column)

Central Gateway

SAE J1708
(9.6kbps)

SAE J1939
(250kbps)

SAE J1939−13
9−Pin connector

Engine Control

Module

Pneumatic ABS

Module

Transmission

Control Module

Instrument

Cluster

HVAC Control

Switches Front

HVAC Control
Switches Rear

Radio

07/02/2007

VORAD

Engine Display

Qualcomm

f040753

Fig. 1, Datalink Network Topology

Cascadia Troubleshooting Manual, March 2010G02.05/4

SAM Chassis G02.05

600 — Component Locations

2

1

3

4

5

07/18/2007

1. SAM Cab

2. Starpoint Connector

Cascadia Troubleshooting Manual, March 2010 G02.05/5

3. Central Gateway

4. Modular Switch Field

Fig. 2, Component Locations

6

5. Diagnostic Connector

6. SAM Chassis

f544916

G02.05 SAM Chassis

601 — Component Details

01/25/2007

Fig. 3, View of the SAM Chassis on the Frontwall

D

E

F

G

05/01/2006

Fig. 4, Diagnostic Connector

Diagnostic Connector

Pin Function

A

B Battery (+)

C J1939 CAN High (+)

D J1939 CAN Low (–)

E CAN Shield (ground)

F J1708/J1587 (+)

G J1708/J1587 (–)

H Diagnostic CAN High (+)

J Diagnostic CAN Low (–)

Battery (–)

Table 1, Diagnostic Connector

A

H

C

B

J

f544954

f151036b

Cascadia Troubleshooting Manual, March 2010G02.05/6

SAM Chassis G02.05

602 — Pinout Mapping

NOTE: The housing of the SAM Cab contains raised lettering, labeling all connectors, fuses, and re­lays.

The SAM Chassis is available in different hardware models: Highline, Midline, and Baseline. Table 2 describes
any differences in pin functionality between these hardware models

Pinout Mapping

Connector Cavity Number

X51

X51 2

X51 3

X51 4 Not connected Not connected Not connected

X51 5

X51 6 Not connected Not connected Not connected

X52 1 Marker Lamp, Side Right Marker Lamp, Side Right Marker Lamp, Side Right

X52 2

X52 3

X52 4

X52 5

X52 6

X52 7

X52 8

X52 9

X53 1 Marker Lamp, Side Left Marker Lamp, Side Left Marker Lamp, Side Left

X53 2

X53 3 Rear View Camera, Ignition Not connected Rear View Camera, Ignition

X53 4

X53 5

X53 6 Rear View Camera, Ground Not connected Rear View Camera, Ground

1

SAM Chassis, Cabin CAN
Low (-)

SAM Chassis, Cabin CAN
High (+)

Hardwired ISS (Ignition
Switch Status), SAM
Chassis

Emergency Battery, SAM
Chassis

Marker Lamp, Side Right,
Ground

Marker Lamp, Corner Rear
Right

Power Feed 2, ABS/BS,
Battery

Marker Lamp, Corner Rear
Right, Ground

Power Feed, ABS/BS,
Ignition

Power Feed 1, ABS/BS,
Battery

Power Feed 1, ABS/BS,
Ground

Power Feed 2, ABS/BS,
Ground

Marker Lamp, Corner Rear
Left

Marker Lamp, Corner Rear
Left, Ground

Trailer ABS Connector (7),
ABS Detection

Highline Baseline Midline

SAM Chassis, Cabin CAN
Low (-)

SAM Chassis, Cabin CAN
High (+)

Hardwired ISS (Ignition
Switch Status), SAM
Chassis

Emergency Battery, SAM
Chassis

Marker Lamp, Side Right,
Ground

Marker Lamp, Corner Rear
Right

Power Feed 2, ABS/BS,
Battery

Marker Lamp, Corner Rear
Right, Ground

Power Feed, ABS/BS,
Ignition

Power Feed 1, ABS/BS,
Battery

Power Feed 1, ABS/BS,
Ground

Power Feed 2, ABS/BS,
Ground

Marker Lamp, Corner Rear
Left

Marker Lamp, Corner Rear
Left, Ground

Trailer ABS Connector (7),
ABS Detection

Function

SAM Chassis, Cabin CAN
Low (-)

SAM Chassis, Cabin CAN
High (+)

Hardwired ISS (Ignition
Switch Status), SAM
Chassis

Emergency Battery, SAM
Chassis

Marker Lamp, Side Right,
Ground

Marker Lamp, Corner Rear
Right

Power Feed 2, ABS/BS,
Battery

Marker Lamp, Corner Rear
Right, Ground

Power Feed, ABS/BS,
Ignition

Power Feed 1, ABS/BS,
Battery

Power Feed 1, ABS/BS,
Ground

Power Feed 2, ABS/BS,
Ground

Marker Lamp, Corner Rear
Left

Marker Lamp, Corner Rear
Left, Ground

Trailer ABS Connector (7),
ABS Detection

Cascadia Troubleshooting Manual, March 2010 G02.05/7

G02.05 SAM Chassis

Pinout Mapping

Connector Cavity Number

X53

X53 8

X53 9 Trailer Turn Lamp Left Trailer Turn Lamp Left Trailer Turn Lamp Left

X54 1

X54 2 Not connected Not connected Not connected

X54 3

X54 4 Not connected Not connected Not connected

X55 1

X55 2 Trailer Marker Lamps Trailer Marker Lamps Trailer Marker Lamps

X55 3 Trailer Tail Lamps Trailer Tail Lamps Trailer Tail Lamps

X55 4 Trailer Stop Lamps Trailer Stop Lamps Trailer Stop Lamps

X56 1 Trailer, Ground 2 (GND2) Not connected Not connected

X56 2

X56 3 Not connected Not connected Not connected

X56 4

X56 5

X56 6

X56 7

X56 8

X56 9 Not connected Not connected Not connected

X56 10

X56 11

X56 12

X56 13

X56 14

7 Trailer Turn Lamp Right Trailer Turn Lamp Right Trailer Turn Lamp Right

Marker Lamp, Side Left,
Ground

Trailer ABS Connector (7),
Ignition

Trailer ABS Connector (7),
Ground 1 (GND1)

Trailer Power, Battery or
Ignition

End of Frame Primary
Trailer Power

Differential Lock Solenoid
Return, FA1 and FA2

Differential Lock Feedback
Switch Return, FA1

Differential Lock Feedback
Switch Return, FA2

End of Frame Primary
Trailer Turn Lamps Right

Differential Lock Feedback
Switch Supply (Chopped),
FA2

End of Frame Primary
Trailer Turn Lamps Left

Differential Lock Feedback
Switch Supply (Chopped),
FA1

Differential Lock Solenoid
Driver, FA1 and FA2

End of Frame Primary
Trailer Tail Lamps

End of Frame Primary
Trailer Stop Lamps

Highline Baseline Midline

Marker Lamp, Side Left,
Ground

Trailer ABS Connector (7),
Ignition

Trailer ABS Connector (7),
Ground 1 (GND1)

Trailer Power, Battery or
Ignition

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Not connected Not connected

Function

Marker Lamp, Side Left,
Ground

Trailer ABS Connector (7),
Ignition

Trailer ABS Connector (7),
Ground 1 (GND1)

Trailer Power, Battery or
Ignition

Cascadia Troubleshooting Manual, March 2010G02.05/8

SAM Chassis G02.05

Pinout Mapping

Connector Cavity Number

X56 15

X57 1

X57 2

X57 3

X57 4

X57 5

X57 6 Not connected Not connected Not connected

X57 7 Not connected Not connected Not connected

X57 8 Not connected Not connected Not connected

X57 9 Not connected Not connected Not connected

X57 10 Not connected Not connected Not connected

X57 11 Not connected Not connected Not connected

X57 12 Not connected Not connected Not connected

X57 13

X57 14 Not connected Not connected Not connected

X57 15

X58 1 Turn Right Rear Lower Turn Right Rear Lower Turn Right Rear Lower

X58 2 Not connected Not connected Not connected

X58 3 Tail Lamp Right Tail Lamp Right Tail Lamp Right

X58 4

X58 5 Tail Lamps Right, Ground Tail Lamps Right, Ground Tail Lamps Right, Ground

X58 6 Not connected Not connected Not connected

X58 7

X58 8 Tail Lamps Left, Ground Tail Lamps Left, Ground Tail Lamps Left, Ground

X58 9 Not connected Not connected Not connected

X58 10 Turn Left Rear Lower Turn Left Rear Lower Turn Left Rear Lower

X58 11 Not connected Not connected Not connected

X58 12 License Plate Lamp (First) License Plate Lamp (First) License Plate Lamp (First)

End of Frame Primary
Trailer Marker Lamps

Power Feed EAPU / WIF
Module, Ignition

Power Feed EAPU (Air
Processing Unit), Ground

Air Dryer (Pneumatic,
Electrically Heated),
Ground

Air Dryer (Pneumatic,
Electrically Heated),
Accessory

Fuel Water Separator
Heater Element, Ground

Power Feed EAPU (Air
Processing Unit), Battery

Fuel Water Separator
Heater Element, Ignition

Marker Lamp, Side Left,
Ground

Fuel Level Sensor,
Feedback

Highline Baseline Midline

Not connected Not connected

Not connected

Not connected

Air Dryer (Pneumatic,
Electrically Heated),
Ground

Air Dryer (Pneumatic,
Electrically Heated),
Accessory

Fuel Water Separator
Heater Element, Ground

Not connected

Fuel Water Separator
Heater Element, Ignition

Marker Lamp, Side Left,
Ground

Fuel Level Sensor,
Feedback

Function

Power Feed EAPU / WIF
Module, Ignition

Power Feed EAPU (Air
Processing Unit), Ground

Air Dryer (Pneumatic,
Electrically Heated),
Ground

Air Dryer (Pneumatic,
Electrically Heated),
Accessory

Fuel Water Separator
Heater Element, Ground

Power Feed EAPU (Air
Processing Unit), Battery

Fuel Water Separator
Heater Element, Ignition

Marker Lamp, Side Left,
Ground

Fuel Level Sensor,
Feedback

Cascadia Troubleshooting Manual, March 2010 G02.05/9

G02.05 SAM Chassis

Pinout Mapping

Connector Cavity Number

X58

X58 14

X58 15 Fuel Level Sensor, Ground Fuel Level Sensor, Ground Fuel Level Sensor, Ground

X58 16 Marker Lamp, Side Left Marker Lamp, Side Left Marker Lamp, Side Left

X58 17 Not connected Not connected Not connected

X58 18 Tail Lamp Left Tail Lamp Left Tail Lamp Left

X58 19 Backup Lamp 1 Backup Lamp 1 Backup Lamp 1

X58 20

X58 21 Stop Lamp, Rear Left Lower Stop Lamp, Rear Left Lower Stop Lamp, Rear Left Lower

X59 1 Backup Switch, Supply Backup Switch, Supply Backup Switch, Supply

X59 2

X59 3 Backup Switch, Return Backup Switch, Return Backup Switch, Return

X59 4 Not connected Not connected Not connected

X59 5 Not connected Not connected Not connected

X59 6 Not connected Not connected Not connected

X59 7 Not connected Not connected Not connected

X59 8 Not connected Not connected Not connected

X59 9

X59 10

X59 11

X59 12 Not connected Not connected Not connected

X59 13

X59 14

X59 15

X59 16

X59 17

X59 18

13 Marker Lamp Side Right Marker Lamp Side Right Marker Lamp Side Right

Marker Lamp Side Right,
Ground

Stop Lamp, Rear Right
Lower

Transmission Neutral
Switch, Supply

Fuel Water Separator
Sensor, Feedback

Temperature Sensor Rear
Axle 1, Feedback

Differential Lock Solenoid
Driver, RA1 and RA2

Temperature Sensor Rear
Axle 2, Feedback

Temperature Sensor Rear
Axle 2, Ground

Differential Lock Feedback
Switch Return, RA1

Differential Lock Solenoid
Return, RA1 and RA2

Temperature Sensor Rear
Axle 1, Ground

Transmission Neutral
Switch, Return

Highline Baseline Midline

Marker Lamp Side Right,
Ground

Stop Lamp, Rear Right
Lower

Transmission Neutral
Switch, Supply

Not connected

Temperature Sensor Rear
Axle 1, Feedback

Differential Lock Solenoid
Driver, RA1 and RA2

Temperature Sensor Rear
Axle 2, Feedback

Temperature Sensor Rear
Axle 2, Ground

Differential Lock Feedback
Switch Return, RA1

Differential Lock Solenoid
Return, RA1 and RA2

Temperature Sensor Rear
Axle 1, Ground

Transmission Neutral
Switch, Return

Function

Marker Lamp Side Right,
Ground

Stop Lamp, Rear Right
Lower

Transmission Neutral
Switch, Supply

Fuel Water Separator
Sensor, Feedback

Temperature Sensor Rear
Axle 1, Feedback

Differential Lock Solenoid
Driver, RA1 and RA2

Temperature Sensor Rear
Axle 2, Feedback

Temperature Sensor Rear
Axle 2, Ground

Differential Lock Feedback
Switch Return, RA1

Differential Lock Solenoid
Return, RA1 and RA2

Temperature Sensor Rear
Axle 1, Ground

Transmission Neutral
Switch, Return

Cascadia Troubleshooting Manual, March 2010G02.05/10

SAM Chassis G02.05

Pinout Mapping

Connector Cavity Number

X59

X59 20

X59 21

19

Differential Lock Feedback
Switch Supply (Chopped),
RA1

Differential Lock Feedback
Switch Supply (Chopped),
RA2

Differential Lock Feedback
Switch Return, RA2

Highline Baseline Midline

Differential Lock Feedback
Switch Supply (Chopped),
RA1

Differential Lock Feedback
Switch Supply (Chopped),
RA2

Differential Lock Feedback
Switch Return, RA2

Table 2, Pinout Mapping

603 — Fuse Mapping

Fuse Mapping

Fuse Fuse Name Rating Connection Pin Function

F1 EAPU 20 X57 13 Power Feed Air Processing Unit, BAT

F2 H2O SEP HEAT 20 X57 15 Fuel Water Heater, IGN

F3 ABS-BAT1 20 X52 7 Power Feed 1 ABS, BAT

F4 ABS-BAT2 10 X52 4 Power Feed 2 ABS, BAT

F5 TRLR TRN L 20 X53 9 Trailer Turn Lamp Left

F6 ABS-IGN 15 X52 6 Power Feed ABS, IGN

F7 WIF/CAMERA 10

F8 TRLR TRN R 20 X53 7 Trailer Turn Lamp Right

F9 TRLR MKR 30 X55 2 Trailer Marker Lamps

F10 SAM RELAY COILS 5 N/A N/A Battery Feed for Relay Coils

F11 TRLR ABS-IGN 30 X54 1 Trailer ABS, IGN

F12 TRLR STOP 30 X55 4 Trailer Stop Lamps

F13 TRLR TAIL 20 X55 3 Trailer Tail Lamps

F14 TRLR PWR 30 X55 1 Trailer Power, BAT or IGN

Table 3, Fuse Mapping

X53 3 Rear View Camera

X57 1 Power Feed EAPU, IGN

Function

Differential Lock Feedback
Switch Supply (Chopped),
RA1

Differential Lock Feedback
Switch Supply (Chopped),
RA2

Differential Lock Feedback
Switch Return, RA2

Cascadia Troubleshooting Manual, March 2010 G02.05/11

G02.05 SAM Chassis

604 — Relay Mapping

Relay Mapping

Relay Coil

Relay Relay Name

H2O SEP HEAT,

R1

IGN

R2 TRLR TRN L SAM Micro

ABS/WIF/
CAMERA, IGN

R4 TRLR TRN R SAM Micro

R5 TRLR MARKER SAM Micro

R6 TRLR ABS-IGN SAM Micro

TRLR STOP

R7

LAMPS

R8 TRLR POWER SAM Micro

TRLR TAIL

R9

LAMPS

* R8 is a single throw relay, it will only have 4 prongs. Either pin 87 or pin 87a will be missing, depending on the intended functionality of the circuit. If prong 87a
is missing the circuit will be normally open, the trailer power circuit is enabled only if the key is in IGN position or enabled through a switch (depending on SAM
parameterization). If prong 87 is missing, the circuit is normally closed (BAT). If a 5 prong relay is used, the trailer power will be always on.

(low current side)

Control (-)

(86)

SAM Micro

SAM Micro

SAM Micro

SAM Micro

Control (+)
(85)

F10 (batt

F10 (batt

F10 (batt

F10 (batt

F10 (batt

F10 (batt

F10 (batt

F10 (batt

F10 (batt

Common

(30)

power)

power)

power)

power)

power)

power)

power)

power)

power)

Batt NO F2 X57 15 Fuel Water Heater, IGN

Batt NO F5 X53 9 Trailer Turn Lamp Left

Batt NO

Batt NO F8 C53 7 Trailer Turn Lamp Right

Batt NO F9 X55 2 Trailer Marker Lamps

Batt NO F11 X54 1 Trailer ABS, IGN

Batt NO F12 X55 4 Trailer Stop Lamps

Batt NO* F14 X55 3 Trailer Power, BAT or IGN

Batt NO F13 X55 1 Trailer Tail Lamps

Table 4, Relay Mapping

Relay

(high current side)

Type

Suppl.

Pwr To

Conn. Pin Circuits Supplied

F6 X52 6 Power Feed ABS, IGN

F7

X53 3 Rear View CameraR3

X57 1 Power Feed EAPU, IGN

700 — Troubleshooting Overview

If the symptom is function- or system-specific (stop lights do not function, for example), refer to the applicable
subject in this manual.

In ServiceLink, use the CAN protocol to troubleshoot or configure the SAM Chassis, via the Diagnostic CAN
datalink. See 601 — Component Details for the Diagnostic CAN pins in the diagnostic connector.

For more information on the Diagnostic CAN datalink, see G03.04 — Datalink, Diagnostic CAN.

701 — Required Tools

• ServiceLink

702 — Possible Causes

• Wiring (bad/loose connection, corrosion, miswiring, etc.)

• SAM Chassis relays

Cascadia Troubleshooting Manual, March 2010G02.05/12

SAM Chassis G02.05

• SAM Chassis fuses

• SAM Chassis parameters

• SAM Chassis ECU software

• Cabin CAN datalink

• Other ECUs on the Cabin CAN datalink

• Diagnostic CAN datalink

703 — Fault Codes

CAN Fault, SAM Chassis

SA SPN

71 168 3

71 168 4

71 520201 3

71 520201 4

FMI

Electrical Potential (Voltage) – voltage
above normal, or shorted to high

Electrical Potential (Voltage) – voltage
below normal, or shorted to low

CAN low – voltage above normal, or
shorted to high source

CAN low – voltage below normal, or
shorted to low source

Fault Description Fault Trigger

Trigger:

be above normal, or shorted to high. Reflects
battery voltage datalink value from the SAM Cab
ECU.

Action:

and the SAM Chassis. Check alternator charging
wiring.

Trigger:

be below normal, or shorted to low. Reflects
battery voltage datalink value from the SAM Cab
ECU.

Action:

and the SAM Chassis. Check alternator charging
wiring.

Trigger:

battery, or high source.

Vehicle Behavior:

with the Cabin CAN datalink, SAM Cab and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

especially in connection to the SAM Chassis.
Verify proper connection of the Cabin CAN
harness to the SAM Chassis.

Trigger:

ground, or low source.

Vehicle Behavior:

the Cabin CAN datalink, SAM Cab, and SAM
Chassis outputs may be behaving according to
Emergency Power Mode.

Action:

especially in connection to the SAM Chassis.
Verify proper connection of the Cabin CAN
harness to the SAM Chassis.

SAM Chassis battery voltage sensed to

Check power feed wiring to the SAM Cab

SAM Chassis battery voltage sensed to

Check power feed wiring to the SAM Cab

The Cabin CAN Low (–) pin is shorted to

In the case of a serious error

Check the Cabin CAN harness,

The Cabin CAN Low (–) pin shorted to

In case of a serious error with

Check the Cabin CAN harness,

Cascadia Troubleshooting Manual, March 2010 G02.05/13

G02.05 SAM Chassis

CAN Fault, SAM Chassis

SA SPN

71

520202 3

71 520202 4

71 523511 31

71 524033 31 Lost communication with the SAM Cab

71 524037 31 Lost communication with the CGW

71 524049 31 Lost communication with the MSF

FMI

CAN high – voltage above normal, or
shorted to high source

CAN high – voltage below normal, or
shorted to low source

Cabin CAN bus performance condition
exists

Fault Description Fault Trigger

Trigger:

battery, or high source.
In the case of a serious error with the Cabin CAN
datalink, SAM Cab and SAM Chassis outputs
may be behaving according to Emergency Power
Mode.

Action:

especially in connection to the SAM Chassis.
Verify proper connection of the Cabin CAN
harness to the SAM Chassis.

Trigger:

ground, or low source.
In the case of a serious error with the Cabin CAN
datalink, SAM Cab and SAM Chassis outputs
may be behaving according to Emergency Power
Mode.

Action:

connection to the SAM Chassis. Verify proper
connection of the Cabin CAN harness to the SAM
Chassis.

Trigger:

performance. In the case of a serious problem
with the Cabin CAN datalink, the SAM Cab and/or
SAM Chassis may be running in Emergency
Power Mode.

Action:

Trigger:

heartbeat messages from the SAM Cab.

Vehicle Behavior:

outputs may be behaving according to
Emergency Power Mode for a SAM Cab failure.
An indication of a SAM Cab failure is that all
gauges in the instrumentation control unit (ICU)
drop to zero because power to the ICU is lost.

Action:

connections to the SAM Cab and SAM Chassis.
Check SAM Cab power supply cables.

Trigger:

heartbeat messages from the CGW.

Action:

connections to the CGW and the SAM Chassis.
Check CGW power supply fuse and wiring.

Trigger:

heartbeat messages from the MSF.

Vehicle Behavior:

on for safety. All functions where input switches
are controlled by the MSF do not function, such
as turn and hazard functions, rotary switch
(headlamp) functions, and wiper.

Action:

connections to the MSF and the SAM Chassis.

Table 5, CAN Fault, SAM Chassis

The Cabin CAN High (+) pin shorted to

Check the Cabin CAN harness,

The Cabin CAN High (+) pin shorted to

Check Cabin CAN harness, especially in

A problem is detected with Cabin CAN

Check Cabin CAN wiring.

The SAM Chassis did not receive

SAM Cab and SAM Chassis

Check Cabin CAN wiring, especially

The SAM Chassis did not receive

Check Cabin CAN wiring, especially

The SAM Chassis did not receive

Headlights automatically turn

Check Cabin CAN wiring, especially

Cascadia Troubleshooting Manual, March 2010G02.05/14

SAM Chassis G02.05

704 — Fused and Relayed Outputs

LOGIC CONTROLLED RELAYED,

12

V From

Megafuse

GNDTo

Battery

N*
G
,I
er

t
ea

H
er

t
a

W

uel
F

15

/

X57

2(20A)
F

85

87

a

87

10 (5A)
F

86

30

R

1

3(20A)F4(10A)

1(20A)

F

F

7

/
13

/

X52
X57

−

−

T

T

BA

BA

,
t,

ni
U

ing
ss

eed 1 ABS
e

F
c

er

w

Po

eed Air Pro
F

er
w

Po

FUSED BATTERY

ft

pLe
m

urn La
T

railer
T
9

/

X53

5(20A)

6(15A)

F

F

85

87

a

87

86

30

R

2

4

/

X52

−
T

BA
,

eed 2 ABS
F

er
w

Po

NOTE R8

R8is a single throw relay,it will
only have4prongs.Either pin
87

or pin87a will be missing
depending on the intended
functionality of the circuit
If prong
circuit will be normally open
trailer power circuit is enabled
only if the key is in IGN position
or enabled through a switch
(

depending on SAM
parameterization)
If prong87is missing,the circuit
is normally closed
If a

5 prong relay is used,the

trailer power will be always on

N
G
,I

era
m

a

wC

eed ABS
F

er
w

ear Vie
R
3

6Po

/

/

X53

X52

7(10A)
F

87

a

87

30

R

:

87a is missing the

N
G
,I
U

eed EAP
F

er
w

1Po

/

X57

85

86

3

urn Lamp Right
T

railer
T
7

/

X53

8(20A)
F

85

87

a

87

86

30

R

4

s
p

m

er La
k

ar
M

railer
T
2

/

X55

9(30A)
F

85

87

87

a

30

86

R

5

INTERNAL SAM PC BOARD

Normally Closed

T

o F13

T

power

(BA

85

87

a

,

.

30

T
BA

87

a

87

86

30

NC Relay−Pin 87

missing

86

85

,

the

(BA

T).

.

)

T

o F13

87

30

T
BA

87

87

86

30

NO Relay−Pin 87a

missing

PASSTHROUGHS

* When specified with Optimized Idle, these pins will not supply power when the key is in the ACC position,

nor during an Optimized Idle vehicle shutdown event. Optimized Idle is specified by a SAM Cab parameter.

02/25/2010

Ref. Dia. SAM CHAS_Relay_Fuse_small.vsd

Fig. 5, Fused and Relayed Outputs

FUSED OUTPUTS

N
G
,I

railer ABS
T
1

/

X54

11 (30A)
F

85

87

a

87

30

R

Normally Open

(

IGN or

Switch power)

85

86

a

85

6

a

87

30

86

NOTE R9

The SAM switches relay
supplying power to fuse
when the headlight switch is
on

!

tail lamps

When in emergency power
mode,the SAM switches relay
on and off,which switches the
power to fuse 13
thus flashing the trailer tail
lamps

s
p

m

op La

t

railer S
T
4

/

X55

12 (30A)
F

85

87

86

R

7

:

9on

13

thus turning on the trailer

.

on and of

.

14 (30A)
F

Note:R8

9

f!

N
G

I
or

T
BA

,
er
w

railer Po
T
1

/

X55

See

R

s
p

m

ail La
T

railer
T
3

/

X55

13 (20A)
F

85

87

a

87

86

30

8

R9
Note:R

8

f545101

Cascadia Troubleshooting Manual, March 2010 G02.05/15

G02.05 SAM Chassis

705 — Unfused Outputs, Grounded Pins, and Inputs

12

V From

Megafuse

GNDTo

Battery

GROUNDED PINS

ND

ND

G
t

G
ft

igh
R

ND
G

ND

ND

t

ear
R

igh
R

orner

Side

C

,

,

s

s

p

p

m

m

er La

er La

k

k

ar

ar

M

M

−

−

2

5

/

/

X52

X52

5

/

X51
!
s

ha
C
,
T

BA
cy

ergen
m
E

ND

ear Le

G

G

G

R

,

,

ft

ND

BS

BS

/

/

orner

ide le

era G

C

s

,

,

m

s

s

a

p

p

m

m

wC

eed 1 ABS

eed 2 ABS

F

F

er La

er La

er

er

k

k

w

w

ar

ar

ear Vie

Po

Po

M

M

R

−

−

−

−

−

8

9

4

8

6

/

/

/

/

/

X52

X52

X53

X53

X53

4

2

/

/

X57

X58

!

!
N

CC

G

I

A
,

ed)

t

Spare

hea
y

all
c
ri

t
c

ele
,
c

i

t
a

m

er (pneu
y

*Air dr

1
ND

G
,

or (7)

t
c

onne
C

railer ABS
T

−
3

/

X54

ND
G

ND

,

G

ND
,
)

G

ed)

t

t

t
ni

ea

U

en

H

m

y

ing

all

ss

c

e

ri

t

c

c
Ele

,
c

i

(Air Pro

t
a

U

m

2
ND

eed EAP

f

er (Pneu
y
r

er

D

w

railer G

Air

T

Po

−

−

−

1

2

3

/

/

/

X56

X57

X57

ND
G

er Ele

ND

t

t

G

ea

igh

ft

H

or

t

er Separa

t

a

W

uel

F

−

5

/

X57

ND

R

G

ND

,

ND

G

or

G

t

Side

s

Side Le

,

ft,

s

,

igh

s

p

R

Le

p

m

,

,

m

s

s

el Sen
v

p

p

m

m

er La
k

er La
k

ar

uel Le

ar

ail La

ail La

M

F

M

T

T

−

−

−

−

−

4

5

8

14

15

/

/

/

/

/

X58

X58

X58

X58

X58

INTERNAL SAM PC

BOARD

1

3

1

2

2

7

/

/

X52

X52

t!

t!
igh

R

ide righ
s

ear

,

R

p
m

orner
C

er La

,

k

p

ar

m

M

er la
k

ar
M

8

/

/

/

/

/

10

X53

ft !

Side Le
,
p

m

er La
k

ar
M

/

X53

X56

X56

X56

X56

!

!

t!

ft !

er

ft !

A2

w

igh

F

Le

R

,

s

s

ear Le

p

p

R

m

m

railer Po
T

hopped)

orner

y

C
(

urn La

urn La

C

ar

T

y

T

,

m

p
m

railer

railer

ePri

T

T

hSuppl

m

er La

y

c

y

t

k

ra

i

ar

ar

F

w

ar

f

m

m

S

M

ck

ePri

ePri

End o

m

m

ra

ra

eedba

F

F

F

f

f

ck
Lo

End o

End o

ff

i
D

SAM CHAS INPUTS

ck

ck

ion

t

A2

c

A1

A2

F

e

t

F

ND

ND

G
,

G
,

le 2
x

le 1
x

abin

abin

C

C

ear A
R

or

or rear a

s

s
en

s

ure Sen

ure

t

t

pera

pera

m

m

e

e

T

T

−

−

14

17

/

/

X59

X59

11

12

13

/

/

/

X56

X56

X56

!

!

!
s
p

A1

A2

F

F

m

,

ail La
T

A1 and
F

hopped)

,

c
(

er

railer

y

v

T

ri

y

D

ar

m
h Suppl
c

t

i

ePri

w

Solenoid

m

S

ra

ck

ck

F

f

Lo
ff

i
D

eedba

End o

F
ck
Lo

ff

i
D

s

−

−
ha

H

_L

_

C
,

N

N

A

A

SS

C

C

I

s

s

ha

ha

ired

C

C

w

_

_

M

M

ard
H

SA

SA

−

−

−
3

1

2

/

/

/

X51

X51

X51

1

3

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UNFUSED

CONSTANT

LOGIC CONTROLLED

UNFUSED OUTPUTS

OUTPUTS

* When specified with Optimized Idle, these pins will not supply power when the key is in the ACC position,

nor during an Optimized Idle vehicle shutdown event. Optimized Idle is specified by a SAM Cab parameter.

02/25/2010

Fig. 6, Unfused Outputs, Grounded Pins, and Inputs

Ref. Dia. SAM_CHAS_unfused small.vsd

Cascadia Troubleshooting Manual, March 2010G02.05/16

f545103