Eaton Transmission RTO-9109B-AT Service Manual

Troubleshooting Guide

Fuller Heavy Duty Tr
TRTS0020 EN-US

October 2007

RT-11109A-AT
RT-11109A-ATR
RT-11109A-ATS
RT-12109A-AT
RT-14109A-ATS
RTO-11109A-AT
RTO-11109A-ATS
RTO-11109B-AT
RTO-11109B-ATE
RTO-11109B-ATR
RTO-11109B-ATS
RTO-12109A-AT
RTO-12109B-AT
RTO-13109A-ATE

RTO-13109B-AT
RTO-13109B-ATE
RTO-14109A-ATE
RTO-14109A-ATS
RTO-14109B-AT
RTO-14109B-ATE
RTO-14109B-ATS
RTO-16109A-AT
RTO-16109A-ATE
RTO-16109B-AT
RTO-16109B-ATE
RTO-9109A-AT
RTO-9109B-AT

ansmissions

For parts or service call us

Pro Gear & Transmission, Inc.

1 [phone]

[phone]

[e-mail]

906 W. Gore St.

Orlando, FL 32805

General Warnings:

Before starting a vehicle:

• Sit in the driver’s seat

• Place shift lever in neutral

• Set the parking brake

Before working on a vehicle or leaving the cab with
engine running:

• Place shift lever in neutral

• Set the parking brake

• Block the wheels

Do not release the parking brake or attempt to select a
gear until the air pressure is at the correct level.

When parking the vehicle or leaving the cab:

• Place shift lever in neutral

• Set the parking brake

OTC Tool & Equipment Division,
SPX Corporation

Eaton Part No. Description

5505027 Volt /Ohm Meter (Standard

commercially available VOM)

For ordering in U.S. and Canada call 1-800-533-0492. (In
Minnesota call 507-455-7010.)

MPSI Micro Processor Systems, Inc.

MPSI Part No. Description

104004 Pro-link Main (MPSI hand-held diagnostic

tool)

205040 Heavy Duty Multi-Protocol Cartridge (MPC)

805001 MPC Eaton Systems Software

For MPSI phone orders call 1-800-639-6774.

To avoid damage to the transmission during towing:

• Place shift lever in neutral

• Lift the drive wheels off of the ground or
disconnect the driveline

Do not operate vehicle if alternator lamp is lit or if gauges
indicate low voltage.

Suggested Tools:

Pressure Gauges:

• 0-300 PSI Hydraulic gauge

• 0-100 PSI Hydraulic gauge

• 0-100 PSI Air gauge

Related Publications

Installation Guide - Eaton TRIG-0020

Driver Instructions - Eaton TRDR-0020

Service Manual - Eaton TRSM-0020

Illustrated Parts List - Eaton TRIP-0023 (11109)

Eaton TRIP-0025 (13109)

Eaton TRIP-0022 (14109)

Eaton TRIP-0026 (16109)

For more information call 1-800-826-HELP (826-4357).

Every effort has been made to ensure the accuracy of all information in this manual. However, Eaton Transmission Division makes no expressed or implied warranty or representation
based on the enclosed information. Any errors or omissions may be reported to Training and Publications, Eaton Transmission Division, P.O. Box 4013, Kalamazoo, MI 49003.

Table of Contents

Section 1: Introduction

Diagnostics Procedure ............................................... 1-2

Fault Codes Retrieval/Clearing..................................... 1-3

Driving Techniques ..................................................... 1-4

Fault Code Isolation Procedure Index .......................... 1-8

Symptom Driven Diagnostics ................................... 1-10

Section 2: Fault Isolation Procedures

Pretests

Electrical Pretest ......................................................... 2-1

Pneumatic Pretest ...................................................... 2-3

Power-Up Sequence Test ........................................... 2-4

Component and System Codes

Component Code 11, ECU .......................................... 2-6

Component Code 14, Shift Lever Fault ........................ 2-8

Component Code 15, Shift Lever Data Link ............... 2-10

Component Code 21, Interrupt Solenoid Coil ............. 2-16

Component Code 22, Lockup/Bypass

Solenoid Coil ............................................................ 2-18

Component Code 23, Engine Speed Sensor .............. 2-20

Component Code 24, Hydraulic System Fault ............ 2-24

Component Code 31, Engine Brake Relay Coil ........... 2-28

Component Code 32, Defuel Solenoid Coil ................ 2-32

Component Code 33, System Voltage ....................... 2-36

Component Code 43, Range Solenoid Coil ................ 2-50

Component Code 44, Disc/Inertia Brake

Solenoid Coil ............................................................ 2-52

Component Code 45, Power Synchronizer

Band/Engine Boost Solenoid Coil .............................. 2-54

Component Code 51, Center Rail Sensor................... 2-56

Component Code 52, Neutral Sensor ........................ 2-60

Component Code 53, Gear Engaged Sensor .............. 2-64

Component Code 54, HI Range Sensor ..................... 2-68

Component Code 55, LO Range Sensor .................... 2-72

Component Code 56, Input Speed Sensor ................. 2-76

Component Code 57, Output Speed Sensor .............. 2-80

Component Code 61, Autoshifter Solenoid 1

Coil .......................................................................... 2-84

Component Code 62, Autoshifter Solenoid 2

Coil .......................................................................... 2-86

Component Code 63, Autoshifter Solenoid 3

Coil .......................................................................... 2-88

Component Code 64, Autoshifter Solenoid 4

Coil .......................................................................... 2-90

System Code 71, Stuck Engaged .............................. 2-92

System Code 72, Failed to Select a Rail ..................... 2-96

System Code 73, Failed to Engage Gear .................. 2-100

System Code 74, Failed to Synchronize ................... 2-104

System Code 81, Invalid Shift Lever at Start

(Cable Only) ........................................................... 2-108

Component Code 34, Throttle Position Sensor .......... 2-38

System Code 35, Engine Control Failure

(Mechanically-Governed Engines) ............................. 2-42

System Code 35, Engine Control Failure

(Electronically-Governed Engines) ............................ 2-44

System Code 41, Range Failed to Engage .................. 2-48

Component Code 82, Multiple Non-Adjacent Senors

(Cable Only) ........................................................... 2-110

System Code 83, Shift Lever Missing

(Cable Only) ........................................................... 2-112

Component Code 83, Shift Lever Missing

(Electronic Only)..................................................... 2-114

1-1

Table of Contents

Section 3: Symptom Isolation Procedures

Symptom Pretests

Transmission Basic Inputs Pretest .............................. 3-1

Engine Interface Pretest .............................................. 3-5

Symptom Tests

Shift Complaint Test ................................................... 3-7

High Operating Temperature Test ............................. 3-14

Hand-Held Diagnostic Tool Failed to Operate Test ..... 3-17

Shift Lever in Gear Signal Test .................................. 3-20

Neutral Output Test .................................................. 3-22

Splitshaft PTO Switch Test........................................ 3-24

Quick to Neutral Test ................................................ 3-26

Shift Lever Auxiliary Output 2 Test ............................ 3-27

Shift Lever Auto Neutral Input Test ........................... 3-29

Shift Lever Back Light Test ....................................... 3-30

Appendix

Torque Converter Hydraulic Diagram .......................... A-1

Pneumatic Diagram AT, ATR and ATS ......................... A-2

Pneumatic Diagram ATE ............................................. A-3

Pneumatic Diagram

Mechanical ATE with Throttle Boost ............................ A-4

Cable Shift Lever Wiring Diagram ............................... A-6

Single Station Electronic Shift Lever Wiring Diagram ... A-8

Dual Station Electronic Shift Lever Wiring Diagram ... A-10

Cable Shift Lever Adjustment Procedure ................... A-12

Linear Throttle Position Adjustment Procedure ......... A-14

Electro-Pneumatic Defuel Control

Adjustment Procedure .............................................. A-15

Dual Station Start Enable .......................................... A-16

Reverse Relay Indicator Test ..................................... 3-31

Start Enable Relay Test ............................................. 3-34

Start Enable Relay Latch Test .................................... 3-40

Shift Lever Voltage Test (Driver Lever) ...................... 3-42

Shift Lever Voltage Test (Work Lever) ....................... 3-44

1-2

1-1

Introduction

Diagnostics Procedure

Follow the flowchart below for all CEEMAT transmission failures. Perform tests and procedures as directed by the flowchart.

Key on.

Failure detected

during self-check?

NO

Retrieve active codes. (Page 1-3)

Active codes?

NO

Retrieve inactive codes. (Page 1-3)

Inactive codes?

NO

YES

YES

YES

• Perform Electrical Pretest
(Page 2-1)

• Perform Power-Up
Sequence Test (Page 2-4)

• Refer to the Fault Code
Isolation Procedure Index
(Page 1-8) to select a fault
code isolation procedure

• Perform Electrical Pretest
(Page 2-1)

• Record and clear codes (Page 1-3)

• Refer to the Fault Code Isolation
Procedure Index (Page 1-8) to
select a fault code isolation
procedure

• Perform Electrical Pretest (Page 2-1)

• Perform Pneumatic Pretest (Page 2-3)

1-2

Symptom?

NO

Test complete.

YES

• Perform Electrical Pretest (Page 2-1)

• Perform Pneumatic Pretest (Page 2-3)

• Perform Transmission Basic Inputs
Pretest (Page 3-1)

• Perform Engine Interface Pretest (Page 3-5)

• Refer to Symptom Driven Diagnostics
Table (Page 1-10) to select a fault
isolation procedure

Introduction

Fault Codes Retrieval/Clearing

Retrieving Fault Codes

Retrieve CEEMAT fault codes by enabling the CEEMAT
system’s self-diagnostic mode.

Note: You can also use a diagnostic scan tool, such as the
MPSI Pro Link Main, to retrieve CEEMAT fault codes. Refer to
the OEM’s documentation for more information.

1. Place the shift lever in neutral.

2. Set the parking brakes.

3. Turn the ignition key on but do

4. To Retrieve Active Codes: Start with the key in the on
position. Turn the key off and on two times within five
seconds ending with the key in the on position.

2 times

off

not

start the engine.

on

Clearing Fault Codes

The following procedure clears all inactive (intermittent) fault
codes from the ECU’s memory. (Active fault codes are
automatically cleared when the fault has been corrected.)

1. Place the shift lever in neutral.

2. Set the parking brakes.

not

3. Turn the ignition key on but do

4. Start with the key in the on position. Turn the key off
and on six times within five seconds ending with the
key in the on position.

6 times

off

start the engine.

on

Fault Codes Retrieval/Clearing

Diagnostics Procedure

To Retrieve Inactive (Intermittent) Codes: Start with

the key in the on position. Turn the key off and on four
times within five seconds ending with the key in the on
position.

4 times

off

After a brief pause, the service transmission indicator
lamp begins flashing two-digit fault codes.

5. Observe the sequence of flashes on the indicator lamp
and record the codes. A one to two second pause
separates each stored code, and the sequence auto­matically repeats after all codes have been flashed.

2 Flashes 1 Flash

on

Short
pause

(1/2 sec)

(1–2 sec)

3 Flashes 1 Flash

Short

pause

(1/2 sec)

Code 21 Code 31

1-3

Driving Techniques

Introduction

Fault
Codes

11 ECU Component Key on. If the fault is present, the system should

14 Shift Lever Fault Component Key on. If the fault is present, the system should

15 Shift Lever Data Link Component Key on. If the fault is present, the system should

21 Interrupt Solenoid Coil Component Key on. If the fault is present, the system should

Description Type of Code Driving Technique

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration and
selecting different shift lever positions.

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

22 Lockup/Bypass Solenoid Component Key on. If the fault is present, the system should

Coil automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

23 Engine Speed Sensor Component Operate the vehicle above 4th gear until the fault occurs.

Maintain a steady speed. If may be necessary to operate
the vehicle for a prolonged period of time if the cause of
the failure is related to heat or vibration.

24 Hydraulic System Fault Component Complete several automatic shifts while driving the vehicle

through terrain that loads the engine.

31 Engine Brake Relay Coil Component Key on. If the fault is present, the system should

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

32 Defuel Solenoid Coil Component Key on. If the fault is present, the system should

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

1-4

Introduction

Driving Techniques, continued

Fault
Codes

33 System Voltage Component Key on. If the fault is present, the system should

34 Throttle Position Sensor Component Key on. If the fault is present, the system should

35 Engine Control Failure System Operate the vehicle and shift the transmission up and down

Description Type of Code Driving Technique

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration and
varying levels of throttle demand.

(Mechanically-Governed through the gears.
Engines)

Driving Techniques

35 Engine Control Failure System Key on. If the fault is present, the system should

(Electronically-Governed automatically detect the problem and set the code.
Engines) If the fault is not present at key on, operate the vehicle and

attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration and
varying levels of throttle demand.

41 Range Failed to Engage System Operate the vehicle and perform several range upshifts

and downshifts. The failure is detected after 5 consecutive
attempts to complete the same type of range shift. Several
shifts (ten or more) may be necessary before the ECU
confirms the failure.

43 Range Solenoid Coil Component Key on. If the fault is present, the system should

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

44 Disc/Inertia Brake Coil Component Key on. If the fault is present, the system should

automatically detect the problem and set the code.
If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

45 Power Synchronizer Component Key on. If the fault is present, the system should

Band/Engine Boost automatically detect the problem and set the code.
Solenoid Coil If the fault is not present at key on, operate the vehicle and

attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

51 Center Rail Sensor Component Complete several front box gear shifts, including

selections from NEUTRAL and automatic shifts while
in motion.

1-5

Driving Techniques, continued

Introduction

Fault
Codes

52 Neutral Sensor Component Complete several front box gear shifts, including

53 Gear Engaged Sensor Component Complete several front box gear shifts, including

54 HI Range Sensor Component Complete several range shifts up and down across the

55 LO Range Sensor Component Complete several range shifts up and down across the

56 Input Speed Sensor Component Select a forward gear and drive at a steady speed for

57 Output Speed Sensor Component Select a forward gear and drive at a steady speed for

61 Autoshifter Solenoid 1 Component Key on. If the fault is present, the system should

Description Type of Code Driving Technique

selections from NEUTRAL and automatic shifts while in
motion.

selections from NEUTRAL and automatic shifts while in
motion.

entire range while the vehicle is in motion.

entire range while the vehicle is in motion.

at least two minutes.

at least two minutes.

Coil automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

62 Autoshifter Solenoid 2 Component Key on. If the fault is present, the system should

Coil automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

63 Autoshifter Solenoid 3 Component Key on. If the fault is present, the system should

Coil automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

64 Autoshifter Solenoid 4 Component Key on. If the fault is present, the system should

Coil automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

1-6

Introduction

Driving Techniques, continued

Fault
Codes

71 Stuck Engaged System Engage LO gear and allow the vehicle to slowly move

72 Failed to Select a Rail System Complete several shifts while the vehicle is in motion,

73 Failed to Engage Gear System Complete several shifts while the vehicle is in motion,

Description Type of Code Driving Technique

forward. While the vehicle is in motion, move the shift
lever to Reverse LO and slowly bring the vehicle to a stop.
The vehicle will shift into Reverse LO. Several shifts (ten
or more) may be required before the ECU confirms
the failure.

including selections from neutral. Also allow the
transmission to complete several automatic shifts.

including selections from neutral. Also allow the trans­mission to complete several automatic shifts.

Driving Techniques

74 Failed to Synchronize System Operate the vehicle at high speeds while shifting the

transmission between 7th, 8th and 9th gears. Since the
transmission makes several calculations before setting
code 71, ten or more shifts may be required before the
ECU confirms the failure.

81 Invalid Shift Lever at System Key on. If the fault is present, the system should

Start (Cable Only) automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat and vibration.

82 Multiple Non-Ajacent Component Key on. If the fault is present, the system should

Sensors (Cable Only) automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and
attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration and

varying levels of shift lever positions.

83 Shift Lever Missing System Key on. If the fault is present, the system should

(Cable Only) automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and

attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration or
different lever positions.

83 Shift Lever Missing Component Key on. If the fault is present, the system should

(Electronic Only) automatically detect the problem and set the code.

If the fault is not present at key on, operate the vehicle and

attempt to duplicate the driving conditions that triggered
the fault code. Possible triggers include heat, vibration or
different lever positions.

1-7

Introduction

Fault Code Isolation Procedure Index

Fault
Codes

11 ECU Component 2-6

14 Shift Lever Fault Component 2-8

15 Shift Lever Data Link Component 2-10

21 Interrupt Solenoid Coil Component 2-16

22 Lockup/Bypass Solenoid Coil Component 2-18

23 Engine Speed Sensor Component 2-20

24 Hydraulic System Fault Component 2-24

31 Engine Brake Relay Coil Component 2-28

32 Defuel Solenoid Coil Component 2-32

33 System Voltage Component 2-36

34 Throttle Position Sensor Component 2-38

35 Engine Control Failure (Mechanically-Governed Engines) System 2-42

35 Engine Control Failure (Electronically-Governed Engines) System 2-44

41 Range Failed to Engage System 2-48

43 Range Solenoid Coil Component 2-50

Description Type of Code Page

Number

44 Disc/Inertia Brake Solenoid Coil Component 2-52

45 Power Synchronizer Band/Engine Boost Solenoid Coil Component 2-54

51 Center Rail Sensor Component 2-56

1-8

Introduction

Fault Code Isolation Procedure Index, continued

Fault Code Isolation Procedure Index

Fault
Codes

52 Neutral Sensor Component 2-60

53 Gear Engaged Sensor Component 2-64

54 HI Range Sensor Component 2-68

55 LO Range Sensor Component 2-72

56 Input Speed Sensor Component 2-76

57 Output Speed Sensor Component 2-80

61 Autoshifter Solenoid 1 Coil Component 2-84

62 Autoshifter Solenoid 2 Coil Component 2-86

63 Autoshifter Solenoid 3 Coil Component 2-88

64 Autoshifter Solenoid 4 Coil Component 2-90

71 Stuck Engaged System 2-92

72 Failed to Select a Rail System 2-96

73 Failed to Engage Gear System 2-100

74 Failed to Synchronize System 2-104

81 Invalid Shift Lever at Start (Cable Only) System 2-108

Description Type of Code Page

Number

82 Multiple Non-Anjacent Sensors (Cable Only) Component 2-110

83 Shift Lever Missing (Cable Only) System 2-112

83 Shift Lever Missing (Electronic Only) Component 2-114

1-9

Introduction

Symptom Driven Diagnostics

Symptom Isolation Procedure Page

Number

Shift complaint

High operating temperature

Hand-held diagnostic tool failed to operate properly

Shift lever in gear signal not functioning properly

Neutral output not functioning properly

Splitshaft PTO switch not functioning properly

Quick to neutral not functioning properly

Shift lever auxiliary output 2 not functioning properly

Shift lever auto neutral input not functioning properly

Shift lever back light not functioning properly

Reverse relay indicator not functioning properly

Start enable relay not functioning properly

Start enable relay latch not functioning properly

Shift lever voltage (Driver lever) not functioning properly

Shift lever voltage (Work lever) not functioning properly

Shift Complaint Test 3-7

High Operating Temperature Test 3-14

Hand-Held Diagnostic Tool Test 3-17

Shift Lever In Gear Signal Test 3-20

Neutral Output Test 3-22

Splitshaft PTO Switch Test 3-24

Quick to Neutral Test 3-26

Shift Lever Auxiliary Output 2 Test 3-27

Shift Lever Auto Neutral Input Test 3-29

Shift Lever Back Light Test 3-30

Reverse Relay Indicator Test 3-31

Start Enable Relay Test 3-34

Start Enable Relay Latch Test 3-40

Shift Lever Voltage Test (Driver Lever) 3-42

Shift Lever Voltage Test (Work Lever) 3-44

1-10

Electrical Pretest

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

Measure battery voltage at

2.

the battery terminals.

VOLTS

A

V

COM

If voltage is 11 to 13 volts

If voltage is outside of range

Go to Step B.

Repair or replace battery
and/or charging system
as required. Repeat
this step.

+

–

Procedure Condition Action

1. Key off.

2. Disconnect vehicle interface
harness from CEEMAT.

3. Measure voltage between
vehicle interface harness
pin L and battery
negative (–) terminal.

BAM

CPNL

DRVU

ES

F

T

GH

K

J

VOLTS

V

COM

–

A

If voltage is within
1 volt of battery voltage

If voltage is outside of range

+

Go to Step C.

Repair or replace vehicle
interface harness, battery
circuit breaker or battery
circuit as required. Repeat
this step.

Electrical Pretest

Step C

Procedure Condition Action

1. Key on.

2. Measure voltage between
vehicle interface harness
pin K and ground.

BAM

CPNL

DRVU

ES

F

T

GH

K

J

VOLTS

V

COM

Ground

A

If voltage is within
1 volt of battery voltage

If voltage is outside of range

Go to Step D.

Repair or replace vehicle
interface harness, ignition
circuit breaker or ignition
circuit as required. Repeat
this step.

2-1

Electrical Pretest, continued

Fault Isolation Procedures

Step D

Procedure Condition Action

1. Key off.

2. Disconnect positive battery cable.

3. Measure resistance between
vehicle interface harness pin:

• B and battery

negative (–) terminal.

• C and battery

negative (–) terminal.

OHMS

V

COM

–

OHMS

V

COM

A

+

A

BAM

CPNL

DRVU

ES

GH

F

BAM

CPNL

DRVU

ES

GH

F

If resistance is 0 to .3 ohms

If resistance is outside of range

K

T

J

K

T

J

Test complete.

Repair or replace vehicle
interface harness or
ground connections as
required. Repeat this step.

2-2

+

–

Pneumatic Pretest

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

2. Install a 0-150 PSI air gauge
in the regulated test port of
the CEEMAT air filter/regulator.

3. Start engine.

4. Allow air pressure to build to
governor cutoff.

5. Read vehicle main air pressure
gauge.

Regulated test port

If air pressure cuts off at
90 to 120 PSI

If air pressure is outside of
range

Go to Step B.

Repair vehicle air system
as required. Repeat
this step.

Procedure Condition Action

1. Key off.

2. Monitor air pressure on vehicle
main air pressure gauge.

If vehicle maintains air pressure

If vehicle loses air pressure

Go to Step C.

Repair leak in vehicle
air system. Repeat this step.

Pneumatic Pretest

Step C

Step D

Procedure Condition Action

1. Read air pressure gauge installed
in the air filter/regulator.

If air pressure is 75 to 85 PSI

If air pressure is outside of
range

Test complete.

Go to Step D.

Procedure Condition Action

1. Key off.

2. Remove air supply line to the
air filter/regulator and check
air flow.

If air flows from the supply line

If air does not flow from the
supply line

Replace air filter/regulator.
Go to Step C.

Repair vehicle air supply
to air filter/regulator.
Go to Step C.

2-3

Power-Up Sequence Test

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key on.

2. Observe service transmission
lamp.

If service transmission lamp

Test complete.
lights for one second and
goes off

If service transmission lamp

Go to Step B.
never comes on

If service transmission lamp is

Go to Step C.
on steady

Procedure Condition Action

1. Key off.

2. Disconnect vehicle interface
harness from CEEMAT.

3. Place jumper wire across
vehicle interface harness
pins G and B.

BAM

CPNL

DRVU

ES

F

T

GH

K

J

If service transmission lamp
turns on

If service transmission lamp
never comes on

Replace ECU.

Go to Step A.

Repair or replace vehicle

interface harness as

required. Go to Step A.

2-4

Step C

Procedure Condition Action

1. Key on.

2. Disconnect vehicle interface
connector at CEEMAT.

If service transmission lamp
turns off

If service transmission lamp
remains on

Replace ECU.

Go to Step A.

Repair or replace vehicle

interface harness as

required. Go to Step A.

Fault Isolation Procedures

Power-Up Sequence Test

This Page left blank intentionally

2-5

Component Code 11
ECU

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem inside the electrical
control unit which is part of the ECU.

Required Tools

• CEEMAT Troubleshooting Guide

Likely Failed Components

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Improper configuration software

• Faulty ECU

2-6

Code 11, ECU Test

Fault Isolation Procedures

Step A

Procedure

1. Key on.

Retrieve codes (see page 1-3).

2.

Condition Action

If code 11 is active

If code 11 is inactive

Replace ECU.

Test complete

.

Code 11

2-7

Component Code 14
Shift Lever Fault

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem inside the electronic
shift lever. The ECU detects this failure when it receives fault
information from the electronic shift lever.

Required Tools

• Basic Hand Tools

• CEEMAT Troubleshooting Guide

Likely Failed Component

Possible Causes

This code is likely caused by a faulty shift lever.

2-8

Electronic shift lever (ESL)

Code 14, Shift Lever Fault Test

Fault Isolation Procedures

Step A

1. Key on.

2.

Retrieve codes (see page 1-3).

Condition ActionProcedure

If code 14 is active

If code 14 is inactive

Replace electronic shift
lever.

Test complete

.

Code 14

2-9

Component Code 15
Shift Lever Data Link

Fault Isolation Procedures

Fault Description

This code indicates the CEEMAT ECU did not receive an
updated shift lever status signal from the electronic shift lever
via the J-1922 data link.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failure Locations

J1

Possible Causes

This code can be caused by any of the following conditions:

• Faulty J-1922 data link

• No electrical power to shift lever

• Faulty shift lever

• Faulty ECU

PTO

ECU

ress
P

Out

Neut

Defuel

GND

TPS

Fuse

A B

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

W24 LAMP_GND

W25 AUX_IN
W27 AUX_OUT1
W28 AUX_OUT2

2-10

Electronic shift lever (ESL)

W1 VIGN

W2 VBAT

W13 GND

Typical shift lever harness

(OEM supplied)

Typical vehicle interface harness

(OEM supplied)

ECU

Fault Isolation Procedures

Code 15, Shift Lever Data Link Test

Step A

OHMS

V

Step B

Procedure Condition Action

1. Select the lever to be tested
(driver or work lever).

2. Key off.

3. Disconnect connector from
electronic shift lever.

4. Disconnect positive battery cable

5. Measure resistance between
electronic shift lever harness
pin B1 and battery
negative (–) terminal.

If resistance is 0 to .3 ohms

If resistance is outside of

A

2345678 9 10 11 12

1

A

COM

B

+

–

range

A

B

Procedure Condition Action

Go to Step B.

Repair ground.
Go to Step V.

Code 15

VOLTS

V

Step C

VOLTS

V

1. Measure voltage between
electronic shift lever harness
pins A5 and B1.

If voltage is within 1 volt
of battery voltage

If voltage is outside of range

A

2345678 9 10 11 12

1

A

COM

B

A

B

Procedure Condition Action

1. Measure voltage between
electronic shift lever harness
pins A7 and B1.

A

1

B

A

COM

2345678 9 10 11 12

A

B

If voltage is 0

If voltage is not 0

Go to Step C.

Repair harness to
shift lever connector.
Go to Step V.

Go to Step D.

Repair short to power
or incorrectly wired
circuit (should be
ignition power).Go to
Step V.

2-11

Fault Isolation Procedures

Code 15, Shift Lever Data Link Test, continued

Step D

Step E

Procedure Condition Action

1. Key on.

2. Measure voltage between
electronic shift lever harness
pins A7 and B1.

If voltage is within 1 volt
of battery voltage

VOLTS

V

COM

A

2345678 9 10 11 12

1

B

A

If voltage is outside of range

A

B

Procedure Condition Action

1. Measure resistance between
electronic shift lever harness
pins B9 and B3.

OHMS

V

A

1

B

A

COM

23 45 678 9 10 11 12

If resistance is 0 to .3 ohms

If resistance is outside of
range

A

B

Go to Step E.

Repair ignition power
line. Go to Step V.

Go to Step F.

Repair open circuit
between pins B9 and B3.
Go to Step V.

2-12

Step F

Procedure Condition Action

1. Check to see if there are
two shift levers.

One shift lever

Two shift levers

Go to Step H.

Go to Step G.

Fault Isolation Procedures

Code 15, Shift Lever Data Link Test, continued

Step G

GROUND

Step H

Procedure Condition Action

1. Disconnect connector from
second electronic shift
lever.

2. Measure resistance between
electronic shift lever harness
pin B9 and ground.

If resistance is more than
10K ohms or infinite

OHMS

V

COM

A

2345678 9 10 11 12

1

B

A

If resistance is less than

A

10K ohms

B

Procedure Condition Action

1. Key off.

2. Disconnect J-1922 data link
from engine ECM.

3. Disconnect harness from

electronic shift lever.

4. Connect hand-held diagnostic tool.

5. Key on.

6. Select Perform Tests.

7. Select Throttle Dip Test.

8. Measure voltage between

electronic shift lever pins A9
and A10 (connect positive
lead to A10).

If voltage is +3.0 to
+4.0 volts

Go to Step H.

Both levers selected.
Repair wiring harness
to pin B9 to ensure
infinite resistance on
non-selected lever.
Go to Step V.

Go to Step I.

Code 15

A

2345678 9 10 11 12

1

B

VOLTS

A

B

V

If voltage is outside of range

A

COM

Go to Step J.

2-13

Fault Isolation Procedures

Code 15, Shift Lever Data Link Test, continued

Step I

Step J

Procedure Condition Action

1. Activate Throttle
Dip Test.

If voltage changes to
–3.0 to –4.0 volts

If voltage does not change
to –3.0 to –4.0 volts

Procedure Condition Action

1. Disconnect vehicle interface

harness from CEEMAT.

2. Measure resistance between

vehicle interface harness
pin A and shift lever harness
pin A10.

A

23 45 678 9 10 11 12

1

B

A

OHMS

B

A

V

COM

Replace shift lever.
Go to Step V.

Go to Step J.

BAM

CPNL

DRVU

ES

F

T

GH

K

J

3. Measure resistance between

vehicle interface harness
pin P and shift lever harness
pin A9.

A

23 45 678 9 10 11 12

1

B

BAM

CPNL

DRVU

ES

F

T

GH

K

J

If resistance is 0 to .3 ohms

If resistance is outside of

A

OHMS

B

V

range

A

COM

Go to Step K.

Repair or replace
J-1922 data link
between electronic
shift lever and CEEMAT.
Go to Step V.

2-14

Fault Isolation Procedures

Code 15, Shift Lever Data Link Test, continued

Step K

Step V

Procedure Condition Action

1.

Measure resistance between
vehicle interface harness
pins:

• A to ground

If resistance is more than
10K ohms or infinite

Replace ECU. Go
to Step V.

• P to ground

BAM

CPNL

DRVU

T

ES

GH

F

BAM

CPNL

DRVU

T

ES

GH

F

If resistance is less than

OHMS

A

V

GROUND

GROUND

COM

OHMS

V

COM

A

K

J

K

J

10K ohms

Repair or replace vehicle
interface harness. Go
to Step V.

Procedure Condition Action

Code 15

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique

to attempt to reset the code

(page 1-4).

6. Check for codes

(see Retrieving Fault Codes,

page 1-3).

If no codes

If code 15 appears

If code other than 15 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-15

Component Code 21
Interrupt Solenoid Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the interrupt
solenoid circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Damaged torque converter harness

• Interrupt solenoid coil open or shorted

• Faulty ECU

Torque converter

harness

2-16

Fault Isolation Procedures

Code 21, Interrupt Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Disconnect torque converter
harness from ECU.

3. Measure resistance between
torque converter harness
pins F and G.

OHMS

A

V

COM

EDC

AB

FGH

If resistance is 2.5 to 5.0 ohms

If resistance is outside of range

Go to Step B.

Replace torque
converter harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance

between torque converter

harness pin F and ground.

OHMS

V

COM

GROUND

EDC

AB

FGH

A

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to
Step V.

Replace torque
converter harness.
Go to Step V.

Code 21

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique

to attempt to reset the code
(page 1-4).

6. Check for codes

(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 21 appears

If code other than 21 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-17

Component Code 22
Lockup/Bypass Solenoid Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the lockup clutch
solenoid circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Torque converter

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Damaged torque converter harness

• Lockup/Bypass solenoid coil open or shorted

• Faulty ECU

harness

2-18

Fault Isolation Procedures

Code 22, Lockup/Bypass Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Disconnect torque converter
harness from ECU.

3. Measure resistance between
torque converter harness

pins B and H.

EDC

AB

FGH

OHMS

V

COM

If resistance is 2.5 to 5.0 ohms

If resistance is outside of range

A

Go to Step B.

Replace torque
converter harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance

between torque converter

harness pin B and ground.

EDC

AB

FGH

OHMS

V

COM

GROUND

A

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to
Step V.

Replace torque
converter harness.
Go to Step V.

Code 22

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 22 appears

If code other than 22 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-19

Component Code 23
Engine Speed Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the engine speed
sensor circuit. The signal from the sensor did not match the
current CEEMAT operating conditions.

Required Tools

• Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

ECU

Torque converter

harness

Possible Causes

This code can be caused by any of the following conditions:

• Electrical open or short in the speed sensor circuit

• Faulty speed sensor harness or connector

• Incorrect speed sensor installation

• Incorrect configuration software

• Faulty ECU

Engine speed

sensor

Engine speed sensor

harness connector

2-20

Fault Isolation Procedures

Code 23, Engine Speed Sensor Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Disconnect engine speed sensor
from torque converter harness.

3. Measure resistance between
engine speed sensor
pins A and B.

OHMS

A

A

V

COM

If resistance is 3K to 4K ohms

If resistance is outside of range

B

Go to Step B.

Replace engine speed
sensor. Go to Step V.

Procedure Condition Action

1. Measure resistance between
engine speed sensor
pin A and ground.

OHMS

B

A

A

V

COM

GROUND

If resistance is more
10K ohms or infinite

If resistance is less
10K ohms

than

than

Go to Step C.

Replace engine speed
sensor. Go to Step V.

Code 23

Step C

Procedure Condition Action

1. Reconnect engine speed sensor.

2. Disconnect torque converter
harness from CEEMAT.

3. Measure resistance between
torque converter harness
pins A and E.

OHMS

A

V

COM

EDC

AB

FGH

If resistance is 3K to 4K ohms

If resistance is outside of range

Go to Step D.

Repair or replace torque
converter harness as
required. Go to Step V.

2-21

Fault Isolation Procedures

Code 23, Engine Speed Sensor Test, continued

Step D

Step V

Procedure Condition Action

1. Measure resistance between
torque converter harness
pin E and ground.

OHMS

V

COM

GROUND

A

EDC

AB

FGH

If resistance is more
10K ohms or infinite

If resistance is less
10K ohms

than

than

Replace ECU. Go to
Step V.

Repair or replace torque
converter harness as
required. Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

Test complete.

2-22

If code 23 appears

If code other than 23 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 23

This Page left blank intentionally

2-23

Component Code 24
Hydraulic System Fault

Fault Isolation Procedures

Fault Description

This code indicates a problem in the CEEMAT hydraulic
system. The ECU detected excessive slip across the torque
converter.

Required Tools

• Basic Hand Tools

• Hand-Held Diagnostic Tool

• 0-300 PDI Hydraulic Gauges

• 0-100 PSI Hydraulic Gauge

• CEEMAT Troubleshooting Guide

Likely Failed Component and Diagnostic Port Locations

Possible Causes

This code can be caused by any of the following conditions:

• Low fluid level

• Low fluid pressure

• Excessive slip across the converter

• Faulty interrupt or lockup clutch

• Faulty hydraulic valve

Torque

converter

2-24

Bypass

(Lockup clutch)

Interrupt clutch

Main

Lube

Fault Isolation Procedures

Code 24 Hydraulic System Fault Test

Note: This test is identical to the basic hydraulic test.

Step A

Step B

Procedure Condition Action

1. Key on.

2. Place transmission in neutral.

3. Allow engine to idle at 600
to 700 RPM for a minimum
of 2 minutes. Ensure
transmission fluid temperature
is 60 to 120° F.

4. Check transmission fluid
level.

If fluid level is at or above
the COLD-FULL mark

If fluid level is below the
COLD-ADD mark

Go to Step B.

Correct fluid level, check
for leaks. Go to Step V.

Procedure Condition Action

1. Key off.

2. Install 0-300 PSI hydraulic
gauges into diagnostic
ports for:

• Main

• Interrupt clutch

• Lockup/ bypass clutch

3. Install a 0-100 PSI hydraulic
gauge into the lube diagnostic
port.

4. Start engine and allow air
pressure to build to governor
cutoff.

5. Turn PTO off (if equipped).

6. With engine at idle, monitor
gauges.

If pressure readings are:

• Main = 225 to 255 PSI

• Interrupt = 0 PSI of main

• Lockup/bypass = 0 PSI

• Lube = 15 to 35 PSI

Go to Step C.

Code 24

If pressure readings are
not in the ranges shown
above

Replace the hydraulic
valve. Go to Step V.

2-25

Fault Isolation Procedures

Code 24 Hydraulic System Fault Test, continued

Step C

Step D

Procedure Condition Action

1. Connect hand-held diagnostic
tool.

2. Select Perform Tests.

3. Select Hydraulic Tests.

4. Select Interrupt Test.

5. Activate the Interrupt Test.

6. Monitor the gauges.

If pressure readings are:

• Main = 225 to 255 PSI

• Interrupt = ±5 PSI of main

• Lockup/bypass = 0 PSI

• Lube = 15 to 35 PSI

If pressure readings are
not in the ranges shown
above

Go to Step D.

Replace the hydraulic
valve. Go to Step V.

Procedure Condition Action

1. Select Lockup Test.

2. Activate the Lockup Test.

3. Monitor the gauges.

If pressure readings are:
Main = 225 to 255 PSI
Interrupt = 0 PSI
Lockup/bypass = ± 5 PSI of Main
Lube = 15 to 35 PS

Replace transmission.
Go to Step V.

2-26

Step V

If pressure readings are not
in the ranges shown above

Replace the hydraulic
valve. Go to Step V.

Verify normal operation Condition Action

1. Review or repeat
Steps C and D.

2. Test drive vehicle.

If pressure readings are
OK and vehicle operates
normally

If pressure readings are
wrong or vehicle does
not operate normally

Test complete.

Go to Step A.

Fault Isolation Procedures

Code 24

This Page left blank intentionally

2-27

Component Code 31
Engine Brake Relay Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the engine brake
relay circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

PTO

ECU

s
res

J1

P

Out

Neut

Defuel

GND

TPS

Fuse

A B

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• Engine brake relay

• Vehicle interface harness

• Faulty ECU

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

Pink 30
Green 86
Gray 87a
Brown 85

Green

Ground

Brown

To CEEMAT
Transmission
ECU Conn J-1
Terminal F

2-28

Typical vehicle harness

(OEM supplied)

Typical engine brake relay

(OEM supplied)

ECU

Fault Isolation Procedures

Code 31, Engine Brake Relay Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Disconnect vehicle interface
harness from transmission.

3. Measure resistance between

vehicle interface harness

pins F and B.

OHMS

A

V

COM

BAM

CPNL

DRVU

T

ES

GH

F

K

J

If resistance is 40 to 90 ohms

If resistance is outside of range

Go to Step B.

Inspect and repair or
replace vehicle interface
harness or engine brake
relay. Go to Step V.

Procedure Condition Action

1.

Measure resistance between
vehicle interface harness
pin F and ground.

BAM

OHMS

V

COM

GROUND

A

CPNL

DRVU

ES

F

T

GH

If resistance more than
10K ohms or infinite

If resistance is less

K

J

than 10K ohms

Replace ECU. Go to
Step V.

Inspect and repair or
replace vehicle interface
harness or engine brake
relay. Go to Step V.

Code 31

2-29

Fault Isolation Procedures

Code 31, Engine Brake Relay Coil Test, continued

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 31 appears

If code other than 31 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-30

Fault Isolation Procedures

Code 31

This Page left blank intentionally

2-31

Component Code 32
Defuel Solenoid Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the defuel
solenoid coil circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

PTO

ECU

ress

J1

P

Out

Neut

Typical vehicle interface harness

Defuel

GND

TPS

Fuse

(OEM supplied)

A B

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

Possible Causes

This code can be caused by an electrical short or open in any
of the following areas:

• Defuel solenoid coil

• Vehicle interface harness

• Faulty ECU

ECU

Throttle control
cylinder
(OEM supplied)

Kit S-2254 (12V)
S-2474 (24V)

2-32

Electro hydraulic defuel control

(OEM supplied)

Air throttle control

Electro-pneumatic

defuel control

Fault Isolation Procedures

Code 32, Defuel Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2.

Disconnect vehicle interface

harness from defuel solenoid coil.

3.

Measure resistance between

coil pins.

OHMS

A

V

COM

B

A

If electro-pneumatic or air
throttle coil resistance is
13 to 18 ohms and

Electro-mechanical or air

Go to Step B.
throttle coil resistance is 2.5
to 5.0 ohms

If resistance is outside of range

Replace defuel solenoid.

Go to Step V.

Procedure Condition Action

1. Measure resistance between
defuel solenoid coil harness

terminal A and ground.

OHMS

B

A

A

V

COM

GROUND

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Go to Step C.

Replace defuel solenoid.
Go to Step V.

Code 32

Step C

Procedure Condition Action

1. Reconnect defuel solenoid coil to
interface harness.

2. Disconnect vehicle interface
harness from ECU.

3. Measure resistance between
vehicle interface harness
pins H and B.

OHMS

A

V

COM

BAM

CPNL

DRVU

ES

GH

F

K

T

J

If electro-pneumatic coil
resistance is 13 to 18 ohms
and

Electro-mechanical coil
resistance is 2.5 to 5.0 ohms

If resistance is outside of range

Go to Step D.

Repair or replace vehicle
interface harness as
required. Go to Step V.

2-33

Fault Isolation Procedures

Code 32, Defuel Solenoid Coil Test, continued

Step D

Step V

Procedure Condition Action

1. Measure resistance between
vehicle interface harness pin H
and ground.

OHMS

A

V

COM

GROUND

BAM

CPNL

DRVU

T

ES

GH

F

K

J

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU.
Go to Step V.

Repair or replace vehicle
interface harness. Go
to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

Test complete.

If code 32 appears

If code other than 32 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-34

Fault Isolation Procedures

Code 32

This Page left blank intentionally

2-35

Component Code 33
System Voltage

Fault Isolation Procedures

Fault Description

This code indicates low or no battery power in the vehicle
interface harness. The ECU has detected that battery power is
less than nine volts.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

PTO

ECU

ress

J1

P

Out

Neut

Defuel

GND

TPS

Fuse

A B

Possible Causes

This code can be caused by any of the following conditions:

• Vehicle batteries or charging system

• Battery bus fuse circuit breaker open

• Damaged vehicle interface harness

• Faulty ECU

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

ECU

2-36

Typical vehicle interface harness

(OEM supplied)

Code 33, System Voltage Test

Fault Isolation Procedures

Step A

Test battery voltage Condition Action

1. Key on.

Retrieve codes (page 1-3).

2.

If code 33 is active

If code 33 is inactive

Perform Electrical Pretest

on page 2-1.

Test complete.

.

Code 33

2-37

Component Code 34
Throttle Position Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the throttle
position sensor circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

PTO

ECU

ss
re
P

J1

Neut

Defuel

Out

TPS

GND

Fuse

Possible Causes

This code can be caused by and electrical short or open in any
of the following areas:

• Throttle position sensor

• Vehicle interface harness

• Faulty ECU

A B

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

C B A

2-38

Typical vehicle interface harness

(OEM supplied)

ECU

Linear TPS

Air throttle integral TPS

(OEM supplied)

Fault Isolation Procedures

Code 34, Throttle Postition Sensor Test

Step A

Procedure Condition Action

1. Disconnect vehicle interface

harness from throttle position
sensor. Measure resistance
between sensor pins:

• A and C

• A and B while opening throttle

• B and C while opening throttle

• C and ground

OHMS

C

A

V

COM

OHMS

C

A

V

COM

OHMS

BA

C

A

V

COM

BA

BA

If A and C resistance is 2K to
15K ohms and

A and B resistance increases
smoothly while opening throttle
and

B and C resistance decreases
smoothly while opening throttle
and

C and ground resistance is
50K to infinity

If any of the above conditions
are not met

Go to Step B.

Repair or replace throttle
position sensor. Go to

Step V.

Code 34

OHMS

V

COM

GROUND

BA

C

A

2-39

Fault Isolation Procedures

Code 34, Throttle Postition Sensor Test, continued

Step B

Procedure Condition Action

1. Reconnect throttle position
sensor.

2. Disconnect vehicle interface
harness from CEEMAT.

3. Measure resistance between
harness pins:

• J and U

• T and U

• J and T

• J and ground

OHMS

A

V

COM

OHMS

A

V

COM

BAM

CPNL

DRVU

ES

GH

F

BAM

CPNL

DRVU

T

ES

GH

F

K

T

J

K

J

If J and U resistance is 2K
to 15K ohms and

T and U resistance increases
smoothly while opening throttle
and

J and T resistance decreases
smoothly while opening throttle
and

J and ground resistance is
50K to infinity

If any of the above conditions
are not met

Replace ECU. Go to Step V.

Repair or replace vehicle
interface harness. Go to
Step V.

2-40

OHMS

V

COM

OHMS

V

COM

GROUND

BAM

CPNL

DRVU

A

A

ES

F

BAM

CPNL

DRVU

ES

F

T

GH

T

GH

K

J

K

J

Fault Isolation Procedures

Code 34, Throttle Postition Sensor Test, continued

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique

to attempt to reset the code
(page 1-4).

6. Check for codes (see

Retrieving Fault Codes,

page 1-3).

If no codes

If code 34 appears

If code other than 34 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Code 34

2-41

Fault Isolation Procedures

System Code 35
Engine Control Failure
(Mechanically-Governed Engines)

Fault Description

This code indicates the engine failed to properly respond to
throttle control during a transmission shift.

Required Tools

• Basic Hand Tools

• Hand-Held Diagnostic Tool

• CEEMAT Troubleshooting Guide

Likely Failure Locations

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Low air pressure

• Contaminated air supply

• Air leak

• Engine idle adjusted too high

• Faulty defuel solenoid coil

• Throttle control system out of adjustment

• Faulty boost solenoid (air throttle only)

Throttle control
cylinder
(OEM supplied)

Kit S-2254 (12V)
S-2474 (24V)

2-42

Electro hydraulic defuel control

(OEM supplied)

Air throttle control

Electro-pneumatic

defuel control

Fault Isolation Procedures

Code 35, Engine Control Failure Test (Mechanically-Governed Engines)

Note: Do not use this test on vehicles using electronic communication for throttle dip.

Step A

Procedure Condition Action

1. Start engine and allow to idle.

2. Connect hand-held diagnostic

tool.

3. Select Perform Tests.

4. Select Throttle Dip Test.

5. Run engine speed up to

governed RPM and activate

Throttle Dip Test.

6. Measure the time required

for the RPM to drop to
1000 RPM.

If engine RPM dropped
more than 275 RPM per
second and throttle dip
test did not abort

If engine RPM dropped
less than 275 RPM per
second

Test complete.

Inspect and adjust or
repair defuel system
as needed. If vehicle is
equipped with an
electro-pneumatic defuel
system, see Appendix for
procedure. Repeat this
step.

Code 35

2-43

Fault Isolation Procedures

System Code 35
Engine Control Failure
(Electronically-Governed Engines)

Fault Description

This code indicates the CEEMAT failed to receive information
from the engine or the engine failed to properly respond to
throttle control during a shift as commanded by the engine
J-1922 data link.

Required Tools

• Basic Hand Tools

• Hand-Held Diagnostic Tool

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failure Locations

PTO

ECU

ress

J1

P

Out

Neut

Defuel

GND

TPS

Fuse

A B

W4 ATA (+)
W3 ATA(-)
W7 Eng Brake
W15 Aux 1 Input
W16 Service Light Ground
W1B Service Light (+)
W6 Service Brake
W1C Service Brake (+)
W1 Ignition Power

Possible Causes

This code can be caused by any of the following conditions:

• Faulty J-1922 data link

• Faulty vehicle interface harness or connections

• Faulty engine harness or connections

• Excessive radio interference

• Faulty engine ECM

• Faulty engine fuel pump

• Faulty ECU

2-44

Typical vehicle interface harness

ECU

(OEM supplied)

DDEC III ECM Cummins ECM CAT ECM

(OEM supplied)

Fault Isolation Procedures

Code 35, Engine Control Failure Test (Electronically-Governed Engine)

Step A

Step B

Procedure Condition Action

1. Key on.

2. Disconnect electronic shift lever
(if equipped)

3. Disconnect J-1922 data link
(attached to vehicle interface harness).

4. Connect hand-held diagnostic tool.

5. Select Perform Tests.

6. Select Throttle Dip Test.

7. On the CEEMAT side of the data
link, measure voltage between
pins A and B (connect (+) positive

test lead to A). This connector is
typically located at the engine.

VOLTS

B

A

A

V

COM

If voltage is +3.0 to +4.0

If voltage is outside of range

Go to Step B.

Go to Step C.

Procedure Condition Action

1. Activate Throttle Dip Test.

If voltage changes to –3.0 to
–4.0 volts

CEEMAT ECU is OK.
See OEM manuals to
check engine ECM
and harness. Go to Step V.

Code 35

Step C

If voltage does not change
to –3.0 to –4.0 volts

Procedure Condition Action

1. Key off.

2. Disconnect vehicle harness
from CEEMAT.

3. Measure resistance between
vehicle interface harness
pin A and J-1922 data link pin A,

typically located at the engine.

BAM

CPNL

DRVU

ES

F

T

GH

K

J

OHMS

V

COM

A

A

If resistance is 0 to .3 ohms

If resistance is outside of
range

B

Go to Step C.

Go to Step D.

Repair or replace vehicle
interface harness.
Go to Step V.

2-45

Fault Isolation Procedures

Code 35, Engine Control Failure Test (Electronically-Governed Engine), continued

Step D

Step E

Procedure Condition Action

1. Measure resistance between
vehicle harness interface pin P

and J-1922 data link pin B.

BAM

CPNL

DRVU

T

ES

GH

F

K

J

OHMS

V

COM

A

A

If resistance is 0 to .3 ohms

If resistance is outside of range

B

Go to Step E.

Repair or replace vehicle
interface harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
vehicle harness interface pins:

• A to ground

• P to ground

BAM

CPNL

DRVU

ES

F

T

GH

K

J

OHMS

V

COM

GROUND

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

A

Replace ECU. Go to
Step V.

Repair or replace vehicle
interface harness.
Go to Step V.

2-46

BAM

CPNL

DRVU

T

ES

GH

F

OHMS

K

J

V

COM

GROUND

A

Fault Isolation Procedures

Code 35, Engine Control Failure Test (Electronically-Governed Engine), continued

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 35 appears

If code other than 35 appears

Repairs complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Code 35

2-47

System Code 41
Range Failed to Engage

Fault Isolation Procedures

Fault Description

This code indicates the transmission is unable to complete a
shift across the range. The range is either stuck in HI or LO,
or cannot complete engagement in HI or LO.

Required Tools

• Basic Hand Tools

• Air Pressure Gauges (0-100 PSI)

• CEEMAT Troubleshooting Guide

• Hand-Held Diagnostic Tool

Likely Failure Locations

Synchronizer

air lines

ECU

Power

synchronizer

band line

Possible Causes

This code can be caused by any of the following conditions:

• Low air pressure

• Contaminated air supply

• Air leak

• Range solenoid stuck

• Failed range synchronizer

• Failed range actuator/cylinder/piston/yoke

• Dragging power synchronizer band

• Failed range slave valve

Range

valve

HI range

pressure air line

LO range

pressure air line

2-48

Range cylinder

Air filter/regulator

Fault Isolation Procedures

Code 41, Range Failed to Engage Test

Step A

Procedure Condition Action

1. Install (in a “T” fashion)
0-100 PSI air gauges
into the range air lines.

2. Start vehicle and allow air
pressure to reach governor
cut-off.

3. Connect hand-held diagnostic
tool and select perform tests.

4. Select air system.

5. Select Range System Test.

6. Activate Test.

In HI range, if HI gauge is
regulated air pressure and LO
gauge is zero, and

In LO range, if LO gauge is
regulated air pressure and HI
gauge is zero

If gauges do not read as
described above

Repair auxiliary section
as required and retest.

Repair range valve on side
of ECU. If problem continues,
replace ECU and retest.

Code 41

2-49

Component Code 43
Range Solenoid Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the range
solenoid.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Possible Causes

The code can be caused by an electrical open or short in one
of the following areas:

Cover harness

connector

• Shift bar housing cover harness

• Range solenoid coil

• Faulty ECU

Range solenoidECU

2-50

Fault Isolation Procedures

Code 43, Range Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect cover harness from ECU.

4. Measure resistance between
cover harness pins 1 and 2.

OHMS

V

COM

654

A

123

If resistance is 11 to 18 ohms

If resistance is outside of range

Go to Step B.

Replace cover harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
cover harness pin 1 and
ground.

OHMS

V

COM

GROUND

654

A

123

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to
Step V.

Replace cover harness.
Go to Step V.

Code 43

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(Page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 43 appears

If code other than 43 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (Page 1-8).

2-51

Fault Isolation Procedures

Component Code 44
Disc/Inertia Brake Solenoid Coil

Fault Description

This code indicates an electrical problem in the disk/inertia
brake.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

ECU

Cover harness

Possible Causes

This code can be caused by an electrical open or short in one
of the following areas:

• Shift bar housing cover harness

• Disc/inertia brake solenoid coil

• Faulty ECU

Disc/inertia brake solenoid

connector

2-52

Fault Isolation Procedures

Code 44, Disc/Inertia Brake Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect cover harness from ECU.

4. Measure resistance between
cover harness pins 5 and 6.

OHMS

V

COM

654

A

123

If resistance is 11 to 18 ohms

If resistance is outside of range

Go to Step B.

Replace cover harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
cover harness pin 5 and
ground.

OHMS

V

COM

GROUND

654

A

123

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to
Step V.

Replace cover harness.
Go to Step V.

Code 44

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 44 appears

If code other than 44 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-53

Fault Isolation Procedures

Component Code 45
Power Synchronizer Band/Engine
Boost Solenoid Coil

Fault Description

This code indicates an electrical problem in the band/engine
boost solenoid.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

ECU

Cover harness

Possible Causes

The code can be caused by an electrical open or short in one
of the following areas:

• Shift bar housing cover harness

• Power synchronizer band/engine boost solenoid coil

• Faulty ECU

connector

Power sychronizer band/engine
boost solenoid

2-54

Fault Isolation Procedures

Code 45, Power Synchronizer Band/Engine Boost Solenoid Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect cover harness from ECU.

4. Measure resistance between
cover harness pins 3 and 4.

OHMS

V

COM

654

A

123

If resistance is 11 to 18 ohms

If resistance is outside of range

Go to Step B.

Replace cover harness.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
cover harness pin 3 and
ground.

OHMS

V

COM

GROUND

654

A

123

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to
Step V.

Replace cover harness.
Go to Step V.

Code 45

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 45 appears

If code other than 45 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-55

Component Code 51
Center Rail Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the center rail
sensor circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Center rail

sensor (S1)

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• Center rail sensor

• Autoshifter wiring harness

• Autoshifter

• Faulty ECU

ECU

Autoshifter

harness

Autoshifter

2-56

Code 51, Center Rear Sensor Test

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness

from ECU.

4. Inspect harness and position

sensor connections for abrasions
or corrosion.

If harness and connections

Go to Step B.

are OK

If harness or connections
have poor connections,

Repair connections as
needed. Repeat this step.

abrasions or corrosion

Procedure Condition Action

1. Disconnect connector on the

gearbox center switch (S1).

2. Install a jumper wire between

the two sensor pins.

3. Measure resistance between

autoshifter harness terminals
W and D.

OHMS

A

V

COM

If resistance is 0 to .3 ohms

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is outside of
range

Go to Step C.

Repair or replace
autoshifter harness.
Go to Step V.

Code 51

Step C

Procedure Condition Action

1. With the jumper still

connected, measure resistance
between autoshifter harness
terminal W and ground.

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

OHMS

V

COM

GROUND

A

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Go to Step D.

Repair or replace
autoshifter harness.
Go to Step V.

2-57

Fault Isolation Procedures

Code 51, Center Rear Sensor Test, continued

Step D

Step V

Procedure Condition Action

1. Replace the gearbox center
rail sensor (S1) and reassemble
transmission.

2. Key on.

3. Clear codes (see Clearing
Fault Codes, page 1-3).

4. Use Driving Technique to
attempt to reset the code (page 1-4).

5. Check for codes (see Retrieving
Fault Codes, page 1-3).

If code 51 appears again

If code 51 does not reappear

Replace the ECU.
Go to Step V.

Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes (see Retrieving

Fault Codes, page 1-3).

If no codes

Test complete.

2-58

If code 51 appears

If code other than 51 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 51

This Page left blank intentionally

2-59

Component Code 52
Neutral Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the neutral sensor
circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Gearbox neutral

sensor (S3)

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• Gearbox neutral sensor

• Autoshifter wiring harness

• Autoshifter

• Faulty ECU

Autoshifter

harness

ECU

2-60

Autoshifter

Code 52, Neutral Sensor Test

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Inspect harness and position
sensor connections for abrasions
or corrosion.

If harness and connections

Go to Step B.

are OK

If harness or connections
have poor connections,

Repair connections as
needed. Repeat this step.

abrasions or corrosion

Procedure Condition Action

1. Disconnect connector on the

gearbox neutral switch (S3).

2. Install a jumper wire between

the two sensor pins.

3. Measure resistance between

autoshifter harness terminals
J and L.

X

K

OHMS

V

COM

L

M

N

A

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is 0 to .3 ohms

If resistance is outside of
range

Go to Step C.

Repair or replace
autoshifter harness.
Go to Step V.

Code 52

2-61

Fault Isolation Procedures

Code 52, Neutral Sensor Test, continued

Step C

Step D

Procedure Condition Action

1. With the jumper still connected,
measure resistance between
autoshifter harness terminal J
and ground.

OHMS

A

V

COM

GROUND

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Go to Step D.

Repair or replace
autoshifter harness.
Go to Step V.

Procedure Condition Action

1. Replace the gearbox center
rail sensor (S1) and reassemble
transmission.

2. Key on.

3. Clear codes (see Clearing
Fault Codes, page 1-3).

4. Use Driving Technique to
attempt to reset the code (page 1-4).

5. Check for codes (see Retrieving
Fault Codes, page 1-3).

If code 52 appears again

Replace the ECU.
Go to Step V.

2-62

Step V

If code 52 does not reappear

Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing

Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(Page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 52 appears

If code other than 52 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 52

This Page left blank intentionally

2-63

Component Code 53
Gear Engaged Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the gear engaged
sensor circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Gearbox engaged

sensor (bottom)

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• Gearbox engaged sensor

• Autoshifter wiring harness

• Autoshifter

• Faulty ECU

(S2)

ECU

Autoshifter

harness

2-64

Autoshifter

Fault Isolation Procedures

Code 53, Gear Engaged Sensor Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Inspect harness and position
sensor connections for abrasions
or corrosion.

If harness and connections

Go to Step B.

are OK

If harness or connections
have poor connections,

Repair connections as
needed. Repeat this step.

abrasions or corrosion

Procedure Condition Action

1. Disconnect connector on the

gearbox engaged switch (S2).

2. Install a jumper wire between

the two sensor pins.

3. Measure resistance between

autoshifter harness terminals
K and H.

OHMS

A

V

COM

If resistance is 0 to .3 ohms

X

K

W

L

B

M

C

N

D

O

P

V

J

H

U

A

G

T

F

E

S

R

Q

If resistance is outside of
range

Go to Step C.

Repair or replace
autoshifter harness.
Go to Step V.

Code 53

Step C

Procedure Condition Action

1. With the jumper still

connected, measure resistance
between autoshifter harness
terminal K and ground.

X

K

W

OHMS

V

COM

GROUND

L

B

M

C

N

A

D

O

P

V

J

H

U

A

G

T

F

E

S

R

Q

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Go to Step D.

Repair or replace
autoshifter harness. Go
to Step V.

2-65

Fault Isolation Procedures

Code 53, Gear Engaged Sensor Test, continued

Step D

Step V

Procedure Condition Action

1. Replace the gearbox engaged
switch (S2) and reassemble
transmission.

2. Key on.

3. Clear codes (see Clearing
Fault Codes, page 1-3).

4. Use Driving Technique to attempt
to reset the code (page 1-4).

5. Check for codes (see Retrieving
Fault Codes, page 1-3).

If code 53 appears again

If code 53 does not reappear

Replace the ECU.
Go to Step V.

Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes (see Retrieving

Fault Codes, page 1-3).

If no codes

Test complete.

2-66

If code 53 appears

If code other than 53 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 53

This Page left blank intentionally

2-67

Component Code 54
HI Range Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the
HI range sensor circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Shift bar housing

ECU

Autoshifter harness

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• HI range sensor

• Autoshifter wiring harness

• Range switch actuator shaft/pins

• Faulty ECU

HI range

sensor

2-68

Code 54, HI Range Sensor Test

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Inspect harness and position
sensor connections for abrasions
or corrosion.

If harness and connections

Go to Step B.

are OK

If harness or connections
have poor connections,

Repair connections as
needed. Go to Step A.

abrasions or corrosion

Procedure Condition Action

1. Disconnect connector on the
HI range switch (S4).

2. Install a jumper wire between

the two sensor pins.

3. Measure resistance between

autoshifter harness terminals
B and U.

X

K

OHMS

V

COM

L

M

N

A

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is 0 to .3 ohms

If resistance is outside of
range

Go to Step C.

Repair or replace
autoshifter harness.
Go to Step V.

Code 54

Step C

Procedure Condition Action

1. With the jumper still connected,
measure resistance between
autoshifter harness terminal
B and ground. If resistance is more than

10K ohms or infinite

X

K

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is less than
10K ohms

GROUND

OHMS

V

COM

L

M

N

A

O

Go to Step D.

Repair or replace
autoshifter harness.
Go to Step V.

2-69

Fault Isolation Procedures

Code 54, HI Range Sensor Test, continued

Step D

Step V

Procedure Condition Action

1. Replace the gearbox center
rail sensor (S1) and reassemble
transmission.

2. Key on.

3. Clear codes (see Clearing
Fault Codes, page 1-3).

4. Use Driving Technique to
attempt to reset the code (page 1-4).

5. Check for codes (see Retrieving
Fault Codes, page 1-3).

If code 54 appears again

If code 54 does not reappear

Replace the ECU.
Go to Step V.

Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

Test complete.

2-70

If code 54 appears

If code other than 54 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 54

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2-71

Component Code 55
LO Range Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the LO range
sensor circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Shift bar housing

ECU

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• LO range sensor

• Autoshifter wiring harness

• Range switch actuator shaft /pins

• Faulty ECU

LO range

sensor

Autoshifter harness

2-72

Code 55, LO Range Sensor Test

Fault Isolation Procedures

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Inspect harness and position
sensor connections for abrasions
or corrosion.

If harness and connections

Go to Step B.

are OK

If harness and connections
have poor connections,

Repair connections as
needed. Go to Step A.

abrasions or corrosion

Procedure Condition Action

1. Disconnect connector on the
LO range switch (S5).

2. Install a jumper wire between
the two sensor pins.

3. Measure resistance between
autoshifter harness terminals
U and X.

X

K

W

OHMS

V

COM

L

B

M

C

N

A

D

O

P

V

J

H

U

A

G

T

F

E

S

R

Q

If resistance is 0 to .3 ohms

If resistance is outside of
range

Go to Step C.

Repair or replace
autoshifter harness.
Go to Step V.

Code 55

Step C

Procedure Condition Action

1. With the jumper still connected,
measure resistance between
autoshifter harness terminal U
and ground.

X

K

L

J

B

M

A

C

N

D

E

O

P

Q

W

V

H

U

G

T

F

S

R

OHMS

V

COM

GROUND

A

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Go to Step D.

Repair or replace
autoshifter harness.
Go to Step V.

2-73

Fault Isolation Procedures

Code 55, LO Range Sensor Test, continued

Step D

Step V

Procedure Condition Action

1. Replace the LO range switch (S5)
and reassemble transmission.

2. Key on.

3. Clear codes (see Clearing Fault
Codes, page 1-3).

4. Use Driving Technique to attempt
to reset the code (page 1-4).

5.Check for codes (see Retrieving
Fault Codes, page 1-3).

If code 55 appears again

If code 55 does not reappear

Replace the ECU.
Go to Step V.

Go to Step V.

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

Test complete.

2-74

If code 55 appears

If code other than 55 appears

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 55

This Page left blank intentionally

2-75

Component Code 56
Input Speed Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the input shaft
speed sensor circuit. The signal from the sensor did not
match the current CEEMAT operating conditions.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Autoshifter harness

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Poor vehicle electrical ground

• Improper input speed sensor installation

• Defective input speed sensor

• Defective countershaft gear

• Electrical open or short in the autoshifter harness

• Incorrect configuration software

• Faulty ECU

Input speed

sensor

2-76

Fault Isolation Procedures

Code 56, Input Speed Sensor Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Inspect harness and input
speed sensor connections for

abrasions or corrosion.

If harness and connections

Go to Step B.

are OK

If harness and connections
have poor connections,

Repair connections as
needed. Go to Step A.

abrasions or corrosion

Procedure Condition Action

1. Disconnect input speed
sensor from autoshifter harness.

2. Measure resistance of input
speed sensor between pins
A and B.

OHMS

V

If resistance is 3K to 4K ohms

If resistance is outside of range

B

A

A

COM

Go to Step C.

Replace input speed
sensor. Go to Step V.

Code 56

Step C

Procedure Condition Action

1. Measure resistance of input speed
sensor between pin A and
ground.

OHMS

V

GROUND

If resistance is more

than

10K ohms or infinite

B

A

A

COM

If resistance is less
10K ohms

than

Go to Step D.

Replace input speed
sensor. Go to Step V.

2-77

Fault Isolation Procedures

Code 56, Input Speed Sensor Test, continued

Step D

Step E

Procedure Condition Action

1.

Reconnect speed sensor to
autoshifter harness.

2. Disconnect autoshifter harness
from ECU.

3. Measure resistance between
autoshifter harness pins
M and C.

OHMS

A

V

COM

X

K

W

L

B

M

C

N

D

O

P

V

J

H

U

A

G

T

F

E

S

R

Q

If resistance is 3K to 4K ohms

If resistance is outside of range

Go to Step E.

Repair or replace autoshifter
harness as required.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
autoshifter harness pin M and
ground.

OHMS

A

V

COM

GROUND

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to Step V.

Repair or replace autoshifter
harness as required.
Go to Step V.

2-78

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 56 appears

If code other than 56

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 56

This Page left blank intentionally

2-79

Component Code 57
Output Speed Sensor

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the output shaft
speed sensor circuit. The signal from the sensor did not
match the current CEEMAT operating conditions.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Autoshifter harness

Output speed
sensor

ECU

Possible Causes

This code can be caused by any of the following conditions:

• Poor vehicle electrical ground

• Improper output speed sensor installation

• Defective output speed sensor

• Defective auxiliary countershaft gear

• Electrical open or short in the autoshifter harness

• Incorrect configuration software

• Faulty ECU

2-80

Fault Isolation Procedures

Code 57, Output Speed Sensor Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness

from ECU.

4. Inspect harness and output

speed sensor connections for

abrasions or corrosion.

If harness and connections

Go to Step B.

are OK

If harness and connections
have poor connections,

Repair connections as
needed. Go to Step A.

abrasions or corrosion

Procedure Condition Action

1. Disconnect output speed
sensor from autoshifter harness.

2. Measure resistance of output
speed sensor between pins
A and B.

OHMS

V

If resistance is 3K to 4K ohms

If resistance is outside of range

B

A

A

COM

Go to Step C.

Replace input speed
sensor. Go to Step V.

Code 57

Step C

Procedure Condition Action

1. Measure resistance of output speed
sensor between pin A and
ground.

OHMS

V

GROUND

If resistance is more

than

10K ohms or infinite

B

A

A

COM

If resistance is less
10K ohms

than

Go to Step D.

Replace output speed
sensor. Go to Step V.

2-81

Fault Isolation Procedures

Code 57, Output Speed Sensor Test, continued

Step D

Step E

Procedure Condition Action

1.

Reconnect speed sensor to
autoshifter harness.

2. Disconnect autoshifter harness
from CEEMAT.

3. Measure resistance between
autoshifter harness pins
N and O.

OHMS

A

V

COM

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is 3K to 4K ohms

If resistance is outside of range

Go to Step E.

Repair or replace autoshifter
harness as required.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
autoshifter harness pin N and
ground.

OHMS

A

V

COM

GROUND

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is more than
10K ohms or infinite

If resistance is less than
10K ohms

Replace ECU. Go to Step V.

Repair or replace autoshifter
harness as required.
Go to Step V.

2-82

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 57 appears

If code other than 57

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

Fault Isolation Procedures

Code 57

This Page left blank intentionally

2-83

Component Code 61
Autoshifter Solenoid 1 Coil

Fault Isolation Procedures

Fault Description

This code indicates an electrical problem in the autoshifter
solenoid 1 coil circuit.

Required Tools

• Basic Hand Tools

• Digital Volt/Ohm Meter

• CEEMAT Troubleshooting Guide

Likely Failed Components

Solenoid 1 (P1)

Possible Causes

This code can be caused by an electrical open or short in any
of the following areas:

• Autoshifter wiring harness

• Solenoid coil

• Faulty ECU

Autoshifter harness

ECU

2-84

Fault Isolation Procedures

Code 61, Autoshifter Solenoid 1 Coil Test

Step A

Step B

Procedure Condition Action

1. Key off.

2. Remove ECU from transmission.

3. Disconnect autoshifter harness
from ECU.

4. Measure resistance between
autoshifter harness pins T
and F.

OHMS

V

COM

If resistance is 11 to 18 ohms

X

K

L

M

N

A

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

If resistance is outside
of range

Go to Step B.

Replace autoshifter
harness and retest.
Go to Step V.

Procedure Condition Action

1. Measure resistance between
autoshifter harness pin T
and ground.

OHMS

A

V

COM

GROUND

If resistance is more than

X

K

L

M

N

O

W

V

J

B

H

U

A

C

G

D

P

T

F

E

S

R

Q

10K ohms or infinite

If resistance is less than
10K ohms

Replace the ECU.
Go to Step V.

Replace autoshifter
harness. Go to Step V.

Code 61

Step V

Procedure Condition Action

1.

Key off.

2. Reconnect all connectors.

3. Key on.

4. Clear codes (see Clearing
Fault Codes, page 1-3).

5. Use Driving Technique
to attempt to reset the code
(page 1-4).

6. Check for codes
(see Retrieving Fault Codes,
page 1-3).

If no codes

If code 61 appears

If code other than 61 appears

Test complete.

Return to Step A
to find error in testing.

Go to Fault Isolation
Procedure Index (page 1-8).

2-85