Mercedes C 280 1994 V8 2.8L Workshop Manual

mercedesbenz :: Mercedes Benz C 280 (202.028) L6

-2.8L (104.941) (1994)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Locations

Alarm Module: Locations

In trunk, along front wall

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > Remove/Install Infrared Motion Sensor Control Unit

Alarm Module: Service and RepairRemove/Install Infrared Motion Sensor Control Unit

Component Identification

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair >

Remove/Install Infrared Motion Sensor Control Unit > Page 9

C 280 (202.028) L6-2.8L (104.941) (1994)

Removal/Installation

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair > Remove/Install Infrared Motion Sensor Control Unit >

Page 10

Alarm Module: Service and RepairRemove/Install ATA Control Module

Component Identification

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Service and Repair >

Remove/Install Infrared Motion Sensor Control Unit > Page 11

C 280 (202.028) L6-2.8L (104.941) (1994)

Removal/Installation, Steps 1 - 8

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Central Control Module > Component Information > Technical Service Bulletins > Power Windows, Locks, Wipers, Turn Signals

Malfunction

Central Control Module: Technical Service BulletinsPower Windows, Locks, Wipers, Turn Signals Malfunction

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Central Control Module > Component Information > Technical Service Bulletins >

Power Windows, Locks, Wipers, Turn Signals Malfunction > Page 16

C 280 (202.028) L6-2.8L (104.941) (1994)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Crash Control Module > Component Information > Testing and Inspection

Crash Control Module: Testing and Inspection

Checking Crash Shut-Off Relay (Model 170 w/111.943/973)

Component Identification

1 Disconnect connector on crash shut-off relay.
2 Switch on ignition.

Connect multimeter to pin 3 (c. 15) on crash shut-off relay connector and battery ground W1O. Nominal value: Test step 1 11-14V

­Nominal value not reached:Eliminate fault in lead c. 15.

­Nominal value reached: Perform test step 2.

Connect multimeter to pin 2 (c. 31) of crash shut-off relay connector and positive pole of battery. Nominal value: Test step 2 11-14V

­Nominal value not reached:Eliminate fault in lead c 31.

­Nominal value reached:Replace crash shut-off relay.

End of test.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram Information and Instructions

Emergency Contact Module: Diagram Information and Instructions

Diagram System

Wiring diagrams are divided into systems. The layout of the system diagram contains all components of the system (ie: control modules, sensors, voltagesupply, fuse connection, etc.).

For easier comprehension, some system diagrams may be depicted in multiple articles (Part 1, Part 2, etc.). In addition, the subsequent diagrams mayshow wire leads which direct you, by means of an arrow, to a different "part" within that system.

For example: X4/25 (2) II

The X4/25 (2) indicates that the wire continues to component/connector X4/25, pin 2 and the Roman Numeral II indicates that this component and it'swiring may be found in Part 2 of the diagram for the same component/system. (III would direct you to part 3 and so forth.)

Variations in wiring or componentry which are model specific, or due to engine variations or equipment levels are enclosed by a dashed box.
Phase-in changes in variations are denoted with (1) and (2).

Components/wiring for California vehicles are indicated by the callout U2 in the upper left hand corner of a dashed box. The callout U2 is thenreferenced in the legend (component index) as valid for USA California.

Connector sleeves (Z) are replaced by a twin-connection when applicable.Z1 and Z2 are parallel Z splices with the same voltage potential.Actual cross section of wire may differ from values shown in wiring diagram.Changes in cross section of wire will be shown framed.The information for option variations (i.e. ->95 and 96->) denotes: end of MY 1995 and beginning of MY 1996 (respectively).

Vehicles Identification Numbers (VIN) are valid for vehicles built during main production run.Vehicles built during production phase-in or production start-up may have lower Vehicle Identification Numbers.
Coordination of acronym to function is listed in "Acronyms".

Components which include a slash mark in their description, (ie: N47-1 ASR/SPS control module) indicates that the component is applicable to eitherboth systems or just one of the systems.
Example: N47-1 ASR/SPS control module
Model 129 is not equipped with SPS, therefore on a model 129 vehicle, the control module is applicable only for ASR.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram

Information and Instructions > Page 24

C 280 (202.028) L6-2.8L (104.941) (1994)

Model 140 is equipped with SPS, therefore on a model 140 vehicle, the control module is applicable for both ASR and SPS.

Finding the Location of a Connector, Component, Splice or Ground

Abbreviations used within diagrams:X = Connector (example, connector X18)Z = Connector sleeve (Splice)(example, connector sleeve Z49)W = Ground (example, ground W11)

If locations of components, connectors, splices and grounds cannot be found at the system level or component level, they may be found at locations at thevehicle level. See: Locations

Wiring Diagram System: System Diagram Layout Explanation

Acronyms Used
Acronym System/Description

4MATIC Automatically controlled four-wheel drive
A/C (Automatic)

ir onditioning (Automatic)A C

A/C (Tempmatic)

ir onditioning (Tempmatic)A C

AB

iragA B

ABS

nti-lock rake ystemA B S

ADM

utomatic imming inside rearview irrorA D M

ADS

daptive amping ystemA D S

AIR

Secondary injectionAIR

AP

ccelerator edalA P

AS

ntenna ystemA S

ASD Automatic locking differential
ASR

cceleration lip egulationA S R

AT

utomatic ransmissionA T

ATA

nti-heft larmA T A

BA

ackup ssistB A

BARO

metric pressureBARO

BCAPC

arometric pressure-harge ir ressure ompensationB C A P C

BDC

ottom ead enterB D C

BM

ase oduleB M

BPC

arometric ressure ompensationB P C

CA

losing ssistC A

CAN

ontroller rea etworkC A N

CC

ruise ontrolC C

CDC

hangerCD C

CF

onvenience eatureC F

CFI

ontinuous uel njection system (electronic)C F I

CKA

ran ngleC K A

CKP

ranshaft ositionC K P

CL

entral ockingC L

CLUS

Instrument terCLUS

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram

Information and Instructions > Page 25

C 280 (202.028) L6-2.8L (104.941) (1994)

CMP

ashaft ositionC M P

CST

abriolet oft opC S T

CTEL

ellular ephoneC TEL

CTP

losed hrottle osition (idle)C T P

DAS

rive uthorization ystemD A S

DI

istributor gnition systemD I

DM

iagnostic oduleD M

DTC

iagnostic rouble odeD T C

EA

lectronic cceleratorE A

ECL

ngine oolant evelE C L

ECT

ngine oolant emperatureE C T

EDC

lectronic iesel ontrolE D C

EDR

lectronic iesel egulationE D R

EDS

lectronic iesel ystemE D S

EGR

xhaust as ecirculationE G R

EIFI

lectronic n-line uel njectionE I F I

EMSC

lectric irror, teering olumn adjustment, heated mirrorsE M S C

ESA

lectric eat djustmentE S A

ESC

lectric teering olumn adjustmentE S C

ESCM

ngine ystems ontrol oduleE S C M

ESP

lectronic tability rogrameE S P

ETC

lectronic ransmission ontrolE T C

ETR

mergency ensioning etractorE T R

ETS

lectronic raction ystemE T S

EVAP

orative emission control systemEVAP

FFS

rame loor ystemF F S

FP

uel umpF P

GIM

overnor mpulse ethodG I M

HCS

eadlamp leaning ystemH C S

HFM-SFI

equential multiport uel njection/ignition systemHFM S F I

HFS

ands ree ystemH F S

HHT

and-eld esterH H T

HORN

signal systemHORN

HS

eated eatsH S

IAT

ntake ir emperatureI A T

IDC

n-ash ontrollerI D C

INFO

rmation centerINFO

IR

nfraedI R

RCL

emote entral ockingR C L

ISC

dle peed ontrolI S C

KS

nock ensorK S

KSS

nock ensor ystemK S S

LH-SFI

-equential multiport uel njection systemLH S F I

LS

oudspeaker ystemL S

MAF

ass ir lowM A F

MAP

anifold bsolute ressureM A P

ME-SFI

alfunction ndicator ampM I L

MIL

alfunction ndicator ampM I L

MT

anual ransmissionM T

MVA

anifold acuum ssistM V A

OBD

n-oard iagnosticsO B D

OC

xidation atalytic converterO C

OSB

rthopedic eat ackrestO S B

02S

xygen (0) ensorO 2 S

PEC

ressurized ngine ontrolP E C

PL

ower ockingP L

PMP

artial intake anifold reheaterP M P

PNP

ark/eutral ositionP N P

PS

ower teeringP S

PSE

neumatic ystem quipmentP S E

RB

oll arR B

RD

aioR D

REST Residual engine heat utilization
RHR

etractable rear ead estraintsR H R

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram

Information and Instructions > Page 26

C 280 (202.028) L6-2.8L (104.941) (1994)

RHS

ear eated eatsR H S

RPM

evolutions er inute (engine speed)R P M

RST

oadster oft opR S T

RTG

etractable runk lid ripR T G

SBE

eat elt xtenderS B E

SLO

tarter ock-utS L O

SMS

ervice icrofiche ystemS M S

SPS

peed-sensitive ower teeringS P S

SRS

upplemental estraint ystemS R S

TAF

runk lid uxiliary useT A F

TAV

ank eration alveT A V

TB

hrottle odyT B

TC

urbohargerT C

TCM

ransmission ontrol oduleT C M

TD

Speed signal (ime ivision) (EZL)T D

TDC

op ead enterT D C

TIC

ransistorized gnition ontrolT I C

TN Speed signal
TPC

ire ressure ontrolT P C

TPM

ire ressure onitoringT P M

TRAP

OxidizerTRAP

TRIP

computerTRIP

TS

owing ensorT S

TVV

ank ent alveT V V

TWC

hree ay atalytic converterT W C

VAF

olume ir lowV A F

VSS

ehicle peed ensorV S S

WOT

ide pen hrottle (full load)W O T

Color Codes

CODE COLOR

BK black
BR brown
BU blue
IV ivory
GN green
GY grey
TR neutral/transparent
OR orange
PK pink
RD red
VI purple
WT white
YL yellow

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram Information and Instructions > Page 27

Emergency Contact Module: Diagnostic Aids
TROUBLESHOOTING TEST PROCEDURES

TESTING FOR VOLTAGE

Voltage Check

1. Connect one lead of a test light to a known good ground. When using a voltmeter, be sure the voltmeter's negative lead is connected to ground.

2. Connect the other lead of the test light or voltmeter to a selected test point (connector or terminal).

3. If the test light illuminates, there is voltage present. When using a voltmeter, note the voltage reading.

TESTING FOR CONTINUITY

Continuity Check through a Switch

1. Remove the fuse to the circuit involved.

2. Connect one lead of a self-powered test light or ohmmeter to one end of the part of the circuit you wish to test.

3. Connect the other lead to the other end of the circuit.

4. If the self-powered test light glows, there is continuity. When using an ohmmeter, low or no resistance means good continuity.

TESTING FOR VOLTAGE DROP

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram

Information and Instructions > Page 28

C 280 (202.028) L6-2.8L (104.941) (1994)

Voltage Drop Test

This test checks for voltage being lost along a wire, or through a connection or switch.

1. Connect the positive lead of a voltmeter to the end of the wire (or to one side of the connection or switch) which is closer to the Battery.

2. Connect the negative lead to the other end of the wire (or the other side of the connection or switch).

3. Operate the circuit.

4. The voltmeter will show the difference in voltage between the two points.

TESTING FOR SHORT TO GROUND

Testing for Short with Test Light or Voltmeter

With a Test Light or Voltmeter

1. Remove the blown fuse and disconnect the load.

2. Connect a test light or voltmeter across the fuse terminals (be sure that the fuse is powered).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Emergency Contact Module > Component Information > Diagrams > Diagram

Information and Instructions > Page 29

C 280 (202.028) L6-2.8L (104.941) (1994)

3.
Beginning near the Fuse Block, wiggle the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching thetest light or voltmeter.

4. When the test light glows, or the voltmeter registers, there is a short to ground in the wiring near that point.

Testing for Short with Self-Powered Test Light or Ohmmeter

With a Self-Powered Test Light or Ohmmeter

1. Remove the blown fuse and disconnect the Battery and load.

2. Connect one lead of a self-powered test light or ohmmeter to the fuse terminal on the load side.

3. Connect the other lead to a known good ground.

4.
Beginning near the Fuse Block, wiggle the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching theself-powered test light or ohmmeter.

5. When the self-powered test light glows, or the ohmmeter registers, there is a short to ground in the wiring near that point.

Fuses Powering Several Loads

1. Open the first connector or switch leading from the fuse to each load.

2.
Replace the fuse.^

If the fuse blows, the short is in the wiring leading to the first connector or switch. Use a test light or meter as described previously.

^ If fuse does not blow, refer to next step.

3.

Close each connector or switch until the fuse blows in order to find which circuit the short is in. Connect test lamp or meter at the connector to thesuspect circuit (disconnected) rather than at the fuse terminals.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Ignition Shut Down Relay (For Antitheft) > Component Information > Locations

Ignition Shut Down Relay (For Antitheft): Locations

Figure 3

Figure

16

Component Name

Starter lock-out relay module

Component ID

K38

Component ID Component Name

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Ignition Shut Down Relay (For Antitheft) > Component Information > Locations >

Page 33

C 280 (202.028) L6-2.8L (104.941) (1994)

K38 Starter lock-out relay module (ATA)
N2/2 Supplemental restraint system control module

N2/4 Seat belt/keys/lights warning module (USA)
N22 A/C push-button control module
N25/5 Front seat heater control module
N59/1 Diagnostic module II

Figure 4

Figure

5

Component Name

Starter lock-out relay module

Component ID

K38

Component ID Component Name

K1 Overvoltage protection relay module

K38 Starter lock-out relay module
N11/4 REST time-limit relay module

N15 Kickdown cut-out relay module
N25/5 Front HS control module
N30 ABS control module
N59/1 Diagnostic module (OBD II)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > IRCL Control Module

Keyless Entry Module: LocationsIRCL Control Module

Figure 5

Figure

6

Component Name

IRCL control module

Component ID

N54

Component ID Component Name

A37/2 PSE control module (CL)
A37/4 PSE control module (CL, MVA)
K5 Power seat relay module (USA)
K24 CF relay module
K27 FP relay module
N26 ATA control module
N40/3 Left/right audio power amplifier
N54 IRCL control module
N57 CF control module (power windows, sliding/pop-up roof)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > IRCL Control Module > Page 38

Keyless Entry Module: LocationsDAS Control Module - N54/1

In dash, behind the instrument cluster

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Keyless Entry Module > Component Information > Locations > Page 39

Keyless Entry Module: Description and Operation

Infrared remote control module (N54) up to 11/94, (USA) (J) up to 08/95

The control module is located on the control module panel in the trunk. The electrical connection is provided with an installation and removal aid. Towithdraw, press locking lug and pull up coupling on the cable side.
When replacing the control module or the transmitter, always indicate the locking mechanism number since both parts are matched to one another.

Infrared remote control module (N54) as of 12/94, (USA) (J) as of 09/95

The control module is located on the foot panel in the front passenger's footwell. The 12-pin electrical connection is provided with an installation andremoval device. To remove, press the stop notch and fold the clip over. The 2-pin electrical connection is secured with a locking device. To remove,press the stop notch and push the locking device to one side.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and Navigation Operating Unit

Navigation Module: Service and RepairAPS Radio and Navigation Operating Unit

Illustrated On Model 129

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and

Navigation Operating Unit > Page 44

C 280 (202.028) L6-2.8L (104.941) (1994)

Removal/Installation, Steps 1 - 6

References (WH), Commercially Available Tools

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and Navigation Operating Unit > Page 45

Navigation Module: Service and RepairNavigation Processor (APS)

Component Identification

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and

Navigation Operating Unit > Page 46

C 280 (202.028) L6-2.8L (104.941) (1994)

Removal/Installation

References (WH), Commercially Available Tools

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and Navigation Operating Unit > Page 47

Navigation Module: Service and RepairRemove/Install Traffic Data Memory

Component Identification, Part 1

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and

Navigation Operating Unit > Page 48

C 280 (202.028) L6-2.8L (104.941) (1994)

Component Identification, Part 2

Mounting versionsNOTE:

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Navigation Module > Component Information > Service and Repair > APS Radio and

Navigation Operating Unit > Page 49

C 280 (202.028) L6-2.8L (104.941) (1994)

Removal/Installation, Steps 1 - 10

References (WH), Commercially Available Tools

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Parking Assist Control Module > Component Information > Locations

Parking Assist Control Module: Locations

Neu

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Turn Signals/Headlamps ON, Ignition Turned OFF

Relay Module: Technical Service BulletinsTurn Signals/Headlamps ON, Ignition Turned OFF

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Technical Service Bulletins > Turn Signals/

Headlamps ON, Ignition Turned OFF > Page 57

C 280 (202.028) L6-2.8L (104.941) (1994)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Locations > CF (Convenience Feature) Relay Module

Relay Module: LocationsCF (Convenience Feature) Relay Module

Figure 5

Figure

10

Component Name

CF relay module

Component ID

K24

Component ID Component Name

A37/2 PSE control module (CL)
A37/4 PSE control module (CL, MVA)
K5 Power seat relay module (USA)
K24 CF relay module
K27 FP relay module
N26 ATA control module
N40/3 Left/right audio power amplifier
N54 IRCL control module
N57 CF control module (power windows, sliding/pop-up roof)

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Locations > CF (Convenience Feature) Relay Module > Page 60

Relay Module: LocationsRelay Module - K40

Engine compartment, right rear, in control module box

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and Instructions

Relay Module: Diagram Information and Instructions

Diagram System

Wiring diagrams are divided into systems. The layout of the system diagram contains all components of the system (ie: control modules, sensors, voltagesupply, fuse connection, etc.).

For easier comprehension, some system diagrams may be depicted in multiple articles (Part 1, Part 2, etc.). In addition, the subsequent diagrams mayshow wire leads which direct you, by means of an arrow, to a different "part" within that system.

For example: X4/25 (2) II

The X4/25 (2) indicates that the wire continues to component/connector X4/25, pin 2 and the Roman Numeral II indicates that this component and it'swiring may be found in Part 2 of the diagram for the same component/system. (III would direct you to part 3 and so forth.)

Variations in wiring or componentry which are model specific, or due to engine variations or equipment levels are enclosed by a dashed box.
Phase-in changes in variations are denoted with (1) and (2).

Components/wiring for California vehicles are indicated by the callout U2 in the upper left hand corner of a dashed box. The callout U2 is thenreferenced in the legend (component index) as valid for USA California.

Connector sleeves (Z) are replaced by a twin-connection when applicable.Z1 and Z2 are parallel Z splices with the same voltage potential.Actual cross section of wire may differ from values shown in wiring diagram.Changes in cross section of wire will be shown framed.The information for option variations (i.e. ->95 and 96->) denotes: end of MY 1995 and beginning of MY 1996 (respectively).

Vehicles Identification Numbers (VIN) are valid for vehicles built during main production run.Vehicles built during production phase-in or production start-up may have lower Vehicle Identification Numbers.
Coordination of acronym to function is listed in "Acronyms".

Components which include a slash mark in their description, (ie: N47-1 ASR/SPS control module) indicates that the component is applicable to eitherboth systems or just one of the systems.
Example: N47-1 ASR/SPS control module
Model 129 is not equipped with SPS, therefore on a model 129 vehicle, the control module is applicable only for ASR.

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and

Instructions > Page 63

C 280 (202.028) L6-2.8L (104.941) (1994)

Model 140 is equipped with SPS, therefore on a model 140 vehicle, the control module is applicable for both ASR and SPS.

Finding the Location of a Connector, Component, Splice or Ground

Abbreviations used within diagrams:X = Connector (example, connector X18)Z = Connector sleeve (Splice)(example, connector sleeve Z49)W = Ground (example, ground W11)

If locations of components, connectors, splices and grounds cannot be found at the system level or component level, they may be found at locations at thevehicle level. See: Locations

Wiring Diagram System: System Diagram Layout Explanation

Acronyms Used
Acronym System/Description

4MATIC Automatically controlled four-wheel drive
A/C (Automatic)

ir onditioning (Automatic)A C

A/C (Tempmatic)

ir onditioning (Tempmatic)A C

AB

iragA B

ABS

nti-lock rake ystemA B S

ADM

utomatic imming inside rearview irrorA D M

ADS

daptive amping ystemA D S

AIR

Secondary injectionAIR

AP

ccelerator edalA P

AS

ntenna ystemA S

ASD Automatic locking differential
ASR

cceleration lip egulationA S R

AT

utomatic ransmissionA T

ATA

nti-heft larmA T A

BA

ackup ssistB A

BARO

metric pressureBARO

BCAPC

arometric pressure-harge ir ressure ompensationB C A P C

BDC

ottom ead enterB D C

BM

ase oduleB M

BPC

arometric ressure ompensationB P C

CA

losing ssistC A

CAN

ontroller rea etworkC A N

CC

ruise ontrolC C

CDC

hangerCD C

CF

onvenience eatureC F

CFI

ontinuous uel njection system (electronic)C F I

CKA

ran ngleC K A

CKP

ranshaft ositionC K P

CL

entral ockingC L

CLUS

Instrument terCLUS

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and

Instructions > Page 64

C 280 (202.028) L6-2.8L (104.941) (1994)

CMP

ashaft ositionC M P

CST

abriolet oft opC S T

CTEL

ellular ephoneC TEL

CTP

losed hrottle osition (idle)C T P

DAS

rive uthorization ystemD A S

DI

istributor gnition systemD I

DM

iagnostic oduleD M

DTC

iagnostic rouble odeD T C

EA

lectronic cceleratorE A

ECL

ngine oolant evelE C L

ECT

ngine oolant emperatureE C T

EDC

lectronic iesel ontrolE D C

EDR

lectronic iesel egulationE D R

EDS

lectronic iesel ystemE D S

EGR

xhaust as ecirculationE G R

EIFI

lectronic n-line uel njectionE I F I

EMSC

lectric irror, teering olumn adjustment, heated mirrorsE M S C

ESA

lectric eat djustmentE S A

ESC

lectric teering olumn adjustmentE S C

ESCM

ngine ystems ontrol oduleE S C M

ESP

lectronic tability rogrameE S P

ETC

lectronic ransmission ontrolE T C

ETR

mergency ensioning etractorE T R

ETS

lectronic raction ystemE T S

EVAP

orative emission control systemEVAP

FFS

rame loor ystemF F S

FP

uel umpF P

GIM

overnor mpulse ethodG I M

HCS

eadlamp leaning ystemH C S

HFM-SFI

equential multiport uel njection/ignition systemHFM S F I

HFS

ands ree ystemH F S

HHT

and-eld esterH H T

HORN

signal systemHORN

HS

eated eatsH S

IAT

ntake ir emperatureI A T

IDC

n-ash ontrollerI D C

INFO

rmation centerINFO

IR

nfraedI R

RCL

emote entral ockingR C L

ISC

dle peed ontrolI S C

KS

nock ensorK S

KSS

nock ensor ystemK S S

LH-SFI

-equential multiport uel njection systemLH S F I

LS

oudspeaker ystemL S

MAF

ass ir lowM A F

MAP

anifold bsolute ressureM A P

ME-SFI

alfunction ndicator ampM I L

MIL

alfunction ndicator ampM I L

MT

anual ransmissionM T

MVA

anifold acuum ssistM V A

OBD

n-oard iagnosticsO B D

OC

xidation atalytic converterO C

OSB

rthopedic eat ackrestO S B

02S

xygen (0) ensorO 2 S

PEC

ressurized ngine ontrolP E C

PL

ower ockingP L

PMP

artial intake anifold reheaterP M P

PNP

ark/eutral ositionP N P

PS

ower teeringP S

PSE

neumatic ystem quipmentP S E

RB

oll arR B

RD

aioR D

REST Residual engine heat utilization
RHR

etractable rear ead estraintsR H R

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and

Instructions > Page 65

C 280 (202.028) L6-2.8L (104.941) (1994)

RHS

ear eated eatsR H S

RPM

evolutions er inute (engine speed)R P M

RST

oadster oft opR S T

RTG

etractable runk lid ripR T G

SBE

eat elt xtenderS B E

SLO

tarter ock-utS L O

SMS

ervice icrofiche ystemS M S

SPS

peed-sensitive ower teeringS P S

SRS

upplemental estraint ystemS R S

TAF

runk lid uxiliary useT A F

TAV

ank eration alveT A V

TB

hrottle odyT B

TC

urbohargerT C

TCM

ransmission ontrol oduleT C M

TD

Speed signal (ime ivision) (EZL)T D

TDC

op ead enterT D C

TIC

ransistorized gnition ontrolT I C

TN Speed signal
TPC

ire ressure ontrolT P C

TPM

ire ressure onitoringT P M

TRAP

OxidizerTRAP

TRIP

computerTRIP

TS

owing ensorT S

TVV

ank ent alveT V V

TWC

hree ay atalytic converterT W C

VAF

olume ir lowV A F

VSS

ehicle peed ensorV S S

WOT

ide pen hrottle (full load)W O T

Color Codes

CODE COLOR

BK black
BR brown
BU blue
IV ivory
GN green
GY grey
TR neutral/transparent
OR orange
PK pink
RD red
VI purple
WT white
YL yellow

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and Instructions > Page 66

Relay Module: Diagnostic Aids
TROUBLESHOOTING TEST PROCEDURES

TESTING FOR VOLTAGE

Voltage Check

1. Connect one lead of a test light to a known good ground. When using a voltmeter, be sure the voltmeter's negative lead is connected to ground.

2. Connect the other lead of the test light or voltmeter to a selected test point (connector or terminal).

3. If the test light illuminates, there is voltage present. When using a voltmeter, note the voltage reading.

TESTING FOR CONTINUITY

Continuity Check through a Switch

1. Remove the fuse to the circuit involved.

2. Connect one lead of a self-powered test light or ohmmeter to one end of the part of the circuit you wish to test.

3. Connect the other lead to the other end of the circuit.

4. If the self-powered test light glows, there is continuity. When using an ohmmeter, low or no resistance means good continuity.

TESTING FOR VOLTAGE DROP

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and

Instructions > Page 67

C 280 (202.028) L6-2.8L (104.941) (1994)

Voltage Drop Test

This test checks for voltage being lost along a wire, or through a connection or switch.

1. Connect the positive lead of a voltmeter to the end of the wire (or to one side of the connection or switch) which is closer to the Battery.

2. Connect the negative lead to the other end of the wire (or the other side of the connection or switch).

3. Operate the circuit.

4. The voltmeter will show the difference in voltage between the two points.

TESTING FOR SHORT TO GROUND

Testing for Short with Test Light or Voltmeter

With a Test Light or Voltmeter

1. Remove the blown fuse and disconnect the load.

2. Connect a test light or voltmeter across the fuse terminals (be sure that the fuse is powered).

> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Relay Module > Component Information > Diagrams > Diagram Information and

Instructions > Page 68

C 280 (202.028) L6-2.8L (104.941) (1994)

3.
Beginning near the Fuse Block, wiggle the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching thetest light or voltmeter.

4. When the test light glows, or the voltmeter registers, there is a short to ground in the wiring near that point.

Testing for Short with Self-Powered Test Light or Ohmmeter

With a Self-Powered Test Light or Ohmmeter

1. Remove the blown fuse and disconnect the Battery and load.

2. Connect one lead of a self-powered test light or ohmmeter to the fuse terminal on the load side.

3. Connect the other lead to a known good ground.

4.
Beginning near the Fuse Block, wiggle the harness from side to side. Continue this at convenient points (about 6 inches apart) while watching theself-powered test light or ohmmeter.

5. When the self-powered test light glows, or the ohmmeter registers, there is a short to ground in the wiring near that point.

Fuses Powering Several Loads

1. Open the first connector or switch leading from the fuse to each load.

2.
Replace the fuse.^

If the fuse blows, the short is in the wiring leading to the first connector or switch. Use a test light or meter as described previously.

^ If fuse does not blow, refer to next step.

3.

Close each connector or switch until the fuse blows in order to find which circuit the short is in. Connect test lamp or meter at the connector to thesuspect circuit (disconnected) rather than at the fuse terminals.

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > IRCL Control Module

Keyless Entry Module: LocationsIRCL Control Module

Figure 5

Figure

6

Component Name

IRCL control module

Component ID

N54

Component ID Component Name

A37/2 PSE control module (CL)
A37/4 PSE control module (CL, MVA)
K5 Power seat relay module (USA)
K24 CF relay module
K27 FP relay module
N26 ATA control module
N40/3 Left/right audio power amplifier
N54 IRCL control module
N57 CF control module (power windows, sliding/pop-up roof)

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > IRCL Control Module > Page 74

Keyless Entry Module: LocationsDAS Control Module - N54/1

In dash, behind the instrument cluster

> Relays and Modules > Relays and Modules - Body and Frame > Keyless Entry Module > Component Information > Locations > Page 75

Keyless Entry Module: Description and Operation

Infrared remote control module (N54) up to 11/94, (USA) (J) up to 08/95

The control module is located on the control module panel in the trunk. The electrical connection is provided with an installation and removal aid. Towithdraw, press locking lug and pull up coupling on the cable side.
When replacing the control module or the transmitter, always indicate the locking mechanism number since both parts are matched to one another.

Infrared remote control module (N54) as of 12/94, (USA) (J) as of 09/95

The control module is located on the foot panel in the front passenger's footwell. The 12-pin electrical connection is provided with an installation andremoval device. To remove, press the stop notch and fold the clip over. The 2-pin electrical connection is secured with a locking device. To remove,press the stop notch and push the locking device to one side.

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Technical Service Bulletins > Central Locking System - Inoperative With Remote

Power Door Lock Control Module: Technical Service BulletinsCentral Locking System - Inoperative With Remote

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Technical Service Bulletins > Central

Locking System - Inoperative With Remote > Page 80

C 280 (202.028) L6-2.8L (104.941) (1994)

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > CF Control Module

Power Door Lock Control Module: LocationsCF Control Module

Figure 5

Figure

10

Component Name

CF control module (power windows, sliding/pop-up roof)

Component ID

N57

Component ID Component Name

A37/2 PSE control module (CL)
A37/4 PSE control module (CL, MVA)
K5 Power seat relay module (USA)
K24 CF relay module
K27 FP relay module
N26 ATA control module
N40/3 Left/right audio power amplifier
N54 IRCL control module
N57 CF control module (power windows, sliding/pop-up roof)

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > CF Control Module > Page 83

Power Door Lock Control Module: LocationsDoor Control Module, Left Front - N69/1

Driver's door

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > CF Control Module > Page 84

Power Door Lock Control Module: LocationsDoor Control Module, Left Rear - N69/3

Door, left rear

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > CF Control Module > Page 85

Power Door Lock Control Module: LocationsDoor Control Module, Right Front - N69/2

Front passenger's door

> Relays and Modules > Relays and Modules - Body and Frame > Power Door Lock Control Module > Component Information > Locations > CF Control Module > Page 86

Power Door Lock Control Module: LocationsDoor Control Module, Right Rear - N69/4

Door, right rear

> Relays and Modules > Relays and Modules - Body and Frame > Power Seat Control Module > Component Information > Locations

Power Seat Control Module: Locations

Inside center console, attached to heated seat switches