brake DODGE NEON 2000 Service Repair Manual

VEHICLE SPEED CONTROL SYSTEM
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
SPEED CONTROL SYSTEM.................1
SPEED CONTROL SERVO-PCM OUTPUT.......2
SPEED CONTROL SWITCHESÐPCM INPUT....2
STOP LAMP SWITCH......................3
SERVO CABLE...........................3
VACUUM RESERVOIR.....................3VEHICLE SPEED SENSOR..................3
REMOVAL AND INSTALLATION
SPEED CONTROL SERVO...................3
SPEED CONTROL SWITCH..................4
SPEED CONTROL SERVO CABLE.............4
VACUUM RESERVOIR.....................5
DESCRIPTION AND OPERATION
SPEED CONTROL SYSTEM
OPERATION
The speed control system is electronically con-
trolled and vacuum operated. The electronic control
is integrated into the Powertrain Control Module
which is located in the engine compartment. The con-
trols are located on the steering wheel and consist of
five switches. The ON, OFF and SET buttons are
located on the left side of the airbag module. The
RESUME, ACCEL, COAST and CANCEL buttons
are located on the right side of the airbag module
(Fig. 1).
The system is designed to operate at speeds above
25 mph (40 km/h).
WARNING: THE USE OF SPEED CONTROL IS NOT
RECOMMENDED WHEN DRIVING CONDITIONS DO
NOT PERMIT MAINTAINING A CONSTANT SPEED,
SUCH AS IN HEAVY TRAFFIC OR ON ROADS THAT
ARE WINDING, ICY, SNOW COVERED, OR SLIP-
PERY.
The speed control can be disengaged manually by:
²Stepping on the brake pedal
²Depressing the OFF switch
²Depressing the CANCEL switch.
The speed control can be disengaged also by any of
the following conditions:
²An indication of Park or Neutral
²The VSS signal increases at a rate of 10 mph
per second (indicates that the co-efficient of friction
between the road surface and tires is extremely low)
²Depressing the clutch pedal.
²Excessive engine rpm (indicates that the trans-
mission may be in a low gear)²The VSS signal decreases at a rate of 10 mph
per second (indicates that the vehicle may have
decelerated at an extremely high rate)
²If the actual speed is not within 20 mph of the
set speed
The previous disengagement conditions are pro-
grammed for added safety.
Fig. 1 Speed Control Switch
1 ± SPEED CONTROL SWITCHES
2 ± RES ACCEL
3 ± CANCEL
4 ± COAST
5 ± SET
6 ± ON/OFF
PLVEHICLE SPEED CONTROL SYSTEM 8H - 1

SPEED CONTROL SERVO-PCM OUTPUT
DESCRIPTION
The servo unit consists of a solenoid valve body,
and a vacuum chamber. The solenoid valve body con-
tains three solenoids:
²Vacuum
²Vent
²Dump
The vacuum chamber contains a diaphragm with a
cable attached to control the throttle linkage.
OPERATION
The PCM controls the solenoid valve body. The
solenoid valve body controls the application and
release of vacuum to the diaphragm of the vacuum
servo. The servo unit cannot be repaired and is ser-
viced only as a complete assembly.
Power is supplied to the servo's by the PCM
through the brake switch. The PCM controls the
ground path for the vacuum and vent solenoids.
The dump solenoid is energized anytime it receives
power. If power to the dump solenoid is interrupted,
the solenoid dumps vacuum in the servo. This pro-
vides a safety backup to the vent and vacuum sole-
noids.
The vacuum and vent solenoids must be grounded
at the PCM to operate. When the PCM grounds the
vacuum servo solenoid, the solenoid allows vacuum
to enter the servo and pull open the throttle plate
using the cable. When the PCM breaks the ground,
the solenoid closes and no more vacuum is allowed to
enter the servo. The PCM also operates the vent sole-
noid via ground. The vent solenoid opens and closes a
passage to bleed or hold vacuum in the servo as
required.
The PCM duty cycles the vacuum and vent sole-
noids to maintain the set speed, or to accelerate and
decelerate the vehicle. To increase throttle opening,
the PCM grounds the vacuum and vent solenoids. To
decrease throttle opening, the PCM removes the
grounds from the vacuum and vent solenoids. When
the brake is released, if vehicle speed exceeds 25
mph to resume, 30 mph to set, and the RES/ACCEL
switch has been depressed, ground for the vent and
vacuum circuits is restored.
SPEED CONTROL SWITCHESÐPCM INPUT
Description
There are two separate switch pods that operate
the speed control system. The steering-wheel-
mounted switches use multiplexed circuits to provide
inputs to the PCM for ON, OFF, RESUME, ACCEL-
ERATE, SET, DECEL and CANCEL modes. Refer tothe owner's manual for more information on speed
control switch functions and setting procedures.
The individual switches cannot be repaired. If one
switch fails, the entire switch module must be
replaced.
Operation
When speed control is selected by depressing the
ON, OFF switch, the PCM allows a set speed to be
stored in RAM for speed control. To store a set speed,
depress the SET switch while the vehicle is moving
at a speed between 25 and 85 mph. In order for the
speed control to engage, the brakes cannot be
applied, nor can the gear selector be indicating the
transmission is in Park or Neutral.
Once the speed control has been disengaged,
depressing the ACCEL switch restores the vehicle to
the target speed that was stored in the PCM's RAM.
NOTE: Depressing the OFF switch will erase the
set speed stored in the PCM's RAM.
If, while the speed control is engaged, the driver
wishes to increase vehicle speed, the PCM is pro-
grammed for an acceleration feature. With the
ACCEL switch held closed, the vehicle accelerates
slowly to the desired speed. The new target speed is
stored in the RAM when the ACCEL switch is
released. The PCM also has a ªtap-upº feature in
which vehicle speed increases at a rate of approxi-
mately 2 mph for each momentary switch activation
of the ACCEL switch.
The PCM also provides a means to decelerate with-
out disengaging speed control. To decelerate from an
existing recorded target speed, depress and hold the
COAST switch until the desired speed is reached.
Then release the switch. The ON, OFF switch oper-
ates two components: the PCM's ON, OFF input, and
the battery voltage to the brake switch, which powers
the speed control servo.
Multiplexing
The PCM sends out 5 volts through a fixed resistor
and monitors the voltage change between the fixed
resistor and the switches. If none of the switches are
depressed, the PCM will measure 5 volts at the sen-
sor point (open circuit). If a switch with no resistor is
closed, the PCM will measure 0 volts (grounded cir-
cuit). Now, if a resistor is added to a switch, then the
PCM will measure some voltage proportional to the
size of the resistor. By adding a different resistor to
each switch, the PCM will see a different voltage
depending on which switch is pushed.
8H - 2 VEHICLE SPEED CONTROL SYSTEMPL
DESCRIPTION AND OPERATION (Continued)

On most vehicles another resistor has been added
to the at rest circuit causing the PCM to never see 5
volts. This was done for diagnostic purposes. If the
switch circuit should open (bad connection) then the
PCM will see the 5 volts and know the circuit is bad.
The PCM will then set an open circuit fault.
STOP LAMP SWITCH
DESCRIPTION
The switch is mounted on the brake pedal mount-
ing bracket under the instrument panel.
OPERATION
Vehicles equipped with the speed control option use
a dual function stop lamp switch. The PCM monitors
the state of the dual function stop lamp switch. Refer
to the Brake section for more information on stop
lamp switch service and adjustment procedures.
The brake switch is equipped with three sets of
contacts, one normally open and the other two nor-
mally closed (brakes disengaged). The PCM sends a
12 volt signal to one of the normally closed contacts
in the brake switch, which is connected to a ground.
With the contacts closed, the 12 volt signal is pulled
to ground causing the signal to go low. The low volt-
age signal, monitored by the PCM, indicates that the
brakes are not applied. When the brakes are applied,
the contacts open, causing the PCM's output voltage
to go high, disengaging the speed control also
grounding the dump solenoid.
The second set of normally closed contacts is sup-
plied battery voltage any time speed control is
selected. From the brake switch, current is routed to
the speed control servo solenoids. The speed control
solenoids (vacuum, vent and dump) are provided this
current any time the speed control is ON and the
brakes are disengaged. When the driver applies the
brakes, the contacts open and current is interrupted
to the solenoids. The normally open contacts are fed
battery voltage. When the brakes are applied, battery
voltage is supplied to the stop lamps.
SERVO CABLE
DESCRIPTION
The speed control servo cable is connected between
the speed control vacuum servo diaphragm and the
throttle body control linkage.
OPERATION
This cable causes the throttle control linkage to
open or close the throttle valve in response to move-
ment of the vacuum servo diaphragm.
VACUUM RESERVOIR
OPERATION
The reservoir stores engine vacuum in the reser-
voir. When engine vacuum drops, as in climbing a
grade while driving, the reservoir supplies the vac-
uum needed to maintain proper speed control opera-
tion. The vacuum reservoir cannot be repaired and
must be replaced if faulty.
VEHICLE SPEED SENSOR
The Vehicle Speed Sensor (VSS) is a pulse genera-
tor mounted to an adapter near the transmission out-
put shaft. The sensor is driven through the adapter
by a speedometer pinion gear. The VSS pulse signal
to the speedometer/odometer is monitored by the
PCM speed control circuitry to determine vehicle
speed and to maintain speed control set speed.
REMOVAL AND INSTALLATION
SPEED CONTROL SERVO
REMOVAL
(1) Disconnect electrical connector from servo (Fig.
2).
(2) Disconnect vacuum hose from servo
(3) Remove 2 nuts retaining cable to servo.
(4) Remove retaining clip pin holding cable to
servo.
Fig. 2 Speed Control Servo
PLVEHICLE SPEED CONTROL SYSTEM 8H - 3
DESCRIPTION AND OPERATION (Continued)

WIPER MOTOR TEST
CONDITION POSSIBLE CAUSES CORRECTION
WIPER BLADES DO NOT
PARK PROPERLY.(1) WIPER ARMS IMPROPERLY
PARKED.
(2) WIPER ARMS ARE LOOSE ON
PIVOT SHAFT.
(3) MOTOR CRANK LOOSE AT
OUTPUT SHAFT.(1) REMOVE WIPER ARMS AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
(2) REMOVE WIPER ARM AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
(3) REMOVE WIPER ARM, RUN WIPER
MOTOR TO PARK POSITION AND
REMOVE THE MODULE. WITHOUT
ROTATING THE MOTOR OUTPUT
SHAFT, REMOVE THE CRANK AND
CLEAN ANY FOREIGN MATTER FROM
THE MOTOR SHAFT. INSTALL THE
MOTOR CRANK IN ITS ORIGINAL
POSITION.
MOTOR STOPS IN ANY
POSITION WHEN THE
SWITCH IS TURNED
OFF.(1) OPEN PARK CIRCUIT. (1) CHECK PARK SWITCH BY
DISCONNECTING THE WIRE
CONNECTOR AND APPLY BATTERY
VOLTAGE TO PIN 4. PLACE A JUMPER
WIRE FROM PIN 2 TO PIN 3 AND THEN
TO AN EXTERNAL GROUND. REPLACE
MOTOR IF IT DOES NOT PARK.
MOTOR WILL NOT STOP
WHEN THE SWITCH IS
TURNED OFF.(1) FAULTY SWITCH.
(2) LOCK OF DYNAMIC BRAKE
ON WET GLASS.(1) CHECK SWITCH IN LOW, HIGH AND
INTERMITTENT POSITION.
(2) ENSURE PARK SWITCH HAS
CLEAN GROUND.
WIPER BLADES SLAP
AGAINST COWL
SCREEN OR WINDOW
MOLDINGS.(1) WIPER ARMS ARE PARKED
INCORRECTLY.(1) PARK WIPER ARMS. REFER TO
WIPER ARM ADJUSTMENT.
BLADES CHATTER. (1) FOREIGN SUBSTANCE SUCH
AS POLISH ON GLASS OR
BLADES.
(2) ARMS TWISTED, BLADE AT
WRONG ANGLE ON GLASS.
(3) BLADE STRUCTURE BENT.
(4) BLADE ELEMENT HAS
PERMANENT SET.(1) CLEAN GLASS AND BLADE
ELEMENT WITH NON-ABRASIVE
CLEANER.
(2) REPLACE ARM.
(3) REPLACE BLADE.
(4) REPLACE BLADE ELEMENT.
WIPER KNOCK AT
REVERSAL.(1) LINKAGE BUSHINGS WORN.
(2) ARMATURE ENDPLAY IN
MOTOR.(1) REPLACE WORN LINK. REFER TO
WIPER LINKAGE REMOVAL AND
INSTALLATION.
(2) REPLACE WIPER MOTOR. REFER
TO WIPER MOTOR REMOVAL AND
INSTALLATION.
WIPER MOTOR WILL
NOT RUN.(1) BLOWN FUSE.
(2) NEW FUSE BLOWS.
(3) NEW FUSE BLOWS.
(4) NO VOLTAGE AT MOTOR.
(5) POOR GROUND.(1) REPLACE FUSE, AND RUN
SYSTEM.
(2) CHECK FOR SHORT IN WIRING OR
SWITCH.
(3) REPLACE FUSE, REMOVE MOTOR
CONNECTOR, TURN SWITCH ON,
FUSE DOES NOT BLOW, REPLACE
MOTOR.
(4) CHECK SWITCH AND WIRING
HARNESS. REFER TO GROUP 8W,
WIRING DIAGRAMS.
(5) REPAIR GROUND WIRE
CONNECTION AS NECESSARY.
8K - 4 WINDSHIELD WIPER and WASHER SYSTEMSPL
DIAGNOSIS AND TESTING (Continued)

LAMPS
TABLE OF CONTENTS
page page
LAMP DIAGNOSIS......................... 1
HEADLAMP ALIGNMENT.................... 4
LAMP BULB SERVICE...................... 7LAMP SERVICE........................... 12
LAMP SYSTEMS.......................... 16
BULB APPLICATION....................... 17
LAMP DIAGNOSIS
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
DIAGNOSTIC PROCEDURES................1
SAFETY PRECAUTIONS....................1
DAYTIME RUNNING LAMP MODULE...........1DIAGNOSIS AND TESTING
HEADLAMP DIAGNOSIS....................1
FOG LAMP..............................3
DESCRIPTION AND OPERATION
DIAGNOSTIC PROCEDURES
When a vehicle experiences problems with the
headlamp system, verify the condition of the battery
connections, fuses, charging system, headlamp bulbs,
wire connectors, relay, high beam switch, dimmer
switch, and headlamp switch. Refer to Group 8W,
Wiring Diagrams for component locations and circuit
information.
SAFETY PRECAUTIONS
WARNING: EYE PROTECTION SHOULD BE USED
WHEN SERVICING GLASS COMPONENTS. PER-
SONAL INJURY CAN RESULT.
CAUTION: Do not touch the glass of halogen bulbs
with fingers or other possibly oily surface, reduced
bulb life will result.
Do not use bulbs with higher candle power than
indicated in the Bulb Application table at the end of
this group. Damage to lamp and/or Daytime Run-
ning Lamp Module can result.
Do not use fuses, circuit breakers or relays hav-
ing greater amperage value than indicated on the
fuse panel or in the Owners Manual.When it is necessary to remove components to ser-
vice another, it should not be necessary to apply
excessive force or bend a component to remove it.
Before damaging a trim component, verify hidden
fasteners or captured edges are not holding the com-
ponent in place.
DAYTIME RUNNING LAMP MODULE
PL vehicles built for use in Canada are equipped
with a Daytime Running Lamp (DRL) system. Turn
signal lamp circuitry always comes from the multi-
function switch, and goes to the cluster connector,
into the cluster, then back out to the front turn sig-
nal switch lamps. The Canadian cluster provides
steady illumination of the front turn signal when the
ignition switch is in the ON position. The DRL func-
tion may be inhibited by activating the turn signals,
the hazard flashers, the headlamp switch, or park
brake.
DIAGNOSIS AND TESTING
HEADLAMP DIAGNOSIS
Always begin any diagnosis by testing all of the
fuses and circuit breakers in the system. Refer to
Group 8W, Wiring Diagrams.
Conventional and halogen headlamps are inter-
changeable. It is recommended that they not be
intermixed on a given vehicle.
PLLAMPS 8L - 1

BULB APPLICATION
TABLE OF CONTENTS
page page
SPECIFICATIONS
EXTERIOR LAMPS........................17INTERIOR LAMPS........................17
SPECIFICATIONS
EXTERIOR LAMPS
CAUTION: Do not use bulbs that have a higher can-
dle power than the bulb listed in the chart below.
Damage to lamp can result. Do not touch halogen
bulbs with fingers or other oily surfaces. Bulb life
will be reduced.
LAMP BULB
Back Up Lamp................3157 ± P27/7W
Center High Mounted Stop Lamp
(CHMSL).........................W16W
Front Fog Lamp..................... GE881
Front Park/Turn Signal Lamp..........3157NA
Front Side Marker Lamp................. 168
Headlamp............................9007
License Plate Lamp..................... 168
Rear Tail/Stop/
Turn Signal Lamp............3157 ± P27/7W
INTERIOR LAMPS
Service procedures for most of the lamps in the
instrument panel, Instrument cluster and switches
are located in Group 8E, Instrument Panel and
Gauges.
CAUTION: Do not use bulbs that have a higher can-
dle power than the bulb listed in the chart below.
Damage to lamp can result.LAMP BULB
ABS Indicator......................... LED
Airbag Indicator....................... LED
Brake System Warning Indicator.......... LED
Climate Controls....................... LED
Console Gear Selector W/Auto...........PC194
Dome Lamp..........................T579
Floor Console Lamp..................... T37
Front Fog Lamp Indicator................ LED
Glove Compartment....................T194
High Beam Lamp Indicator.............PC194
Ignition Lock........................... 161
Instrument Cluster Illumination.........PC194
Low Fuel Indicator..................... LED
Low Oil Pressure Indicator............... LED
Rear Cargo...........................T906
Seat Belt Indicator..................... LED
Security Alarm Indicator................. LED
Malfunction Indicator Light.............. LED
TRAC OFF Indicator.................... LED
Turn Signal Indicator..................PC194
Underhood............................ 105
Visor Vanity........................6501966
Voltage Indicator....................... LED
All the inside bulbs brass or glass wedge base. Alu-
minum base bulbs are not approved and should not
be used for replacement.
PLLAMPS 8L - 17

BULB APPLICATION
TABLE OF CONTENTS
page page
GENERAL INFORMATION
INTRODUCTION.........................19
SPECIFICATIONS
EXTERIOR LAMPS........................19INTERIOR LAMPS........................19
GENERAL INFORMATION
INTRODUCTION
The following Bulb Application Tables list the lamp
title on the left side of the column and trade number
or part number on the right.
CAUTION: Do not use bulbs that have a higher can-
dle power than the bulb listed in the Bulb Applica-
tion Table. Damage to lamp can result.
Do not touch halogen bulbs with fingers or other
possibly oily surfaces. Bulb life will be reduced.
If a halogen bulb is contaminated with oil, clean
bulb with denatured alcohol or ammonia based sol-
vent.
SPECIFICATIONS
EXTERIOR LAMPS
LAMP BULB
Lowbeam Headlamp..................9006XS
Highbeam Headlamp.................9005XS
Center High Mounted Stop.............W16W
Front Position........................ W5W
Side Repeater / Turn Signal............... 37R
Rear License Plate..................... W5W
Front Turn Signal....................P214W
Tail/Stop...........................P27/7W
Rear Turn Signal....................P27/7W
Back-up...........................P27/7W
Rear Fog Lamp......................P27/7W
INTERIOR LAMPS
LAMP BULB
ABS ...............................PC194
Airbag.............................PC194
AshTray .............................. 161
Brake Warning System Indicator.........PC194
Cigar Lighter.......................... 203
Climate Controls........................ 203
Console Gear Selector.................... 161
Dome Light............................ 578
Glove Box............................. 194
High Beam Indicator..................PC194
Ignition Key........................... 161
Instrument Cluster...................PC194
Rear Cargo............................ 912
Seat Belt Indicator.....................PC74
Service Engine Soon...................PC194
Turn Signal Indicator..................PC194
Underhood............................ 105
Visor Vanity........................6501966
Volts Indicator........................PC74
PLLAMPS 8L - 19

PASSIVE RESTRAINT SYSTEMS
TABLE OF CONTENTS
page page
GENERAL INFORMATION
WARNINGS AND PRECAUTIONS.............1
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE (ACM)..........1
CLOCKSPRING...........................2
DRIVER and PASSENGER AIRBAG MODULE....2
DIAGNOSIS AND TESTING
AIRBAG SYSTEM.........................3
SERVICE PROCEDURES
CLEAN UP PROCEDURE....................3HANDLING AIRBAG MODULES..............4
MAINTENANCE INSPECTION................4
REMOVAL AND INSTALLATION
AIRBAG CONTROL MODULE (ACM)..........4
CLOCKSPRING...........................5
DRIVER AIRBAG MODULE..................6
PASSENGER AIRBAG MODULE..............7
STEERING WHEEL........................8
ADJUSTMENTS
CLOCKSPRING CENTERING PROCEDURE......9
GENERAL INFORMATION
WARNINGS AND PRECAUTIONS
WARNING: THIS SYSTEM IS A SENSITIVE, COM-
PLEX ELECTRO±MECHANICAL UNIT. DISCONNECT
AND ISOLATE THE BATTERY NEGATIVE CABLE
BEFORE BEGINNING AIRBAG SYSTEM COMPO-
NENT REMOVAL OR INSTALLATION PROCEDURES.
THIS WILL DISABLE THE AIRBAG SYSTEM. FAIL-
URE TO DISCONNECT THE BATTERY COULD
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
ALLOW SYSTEM CAPACITOR TO DISCHARGE
FOR ONE MINUTE BEFORE REMOVING AIRBAG
COMPONENTS.
DO NOT PLACE AN INTACT UNDEPLOYED AIRBAG
FACE DOWN ON A SOLID SURFACE, THE AIRBAG
WILL PROPEL INTO THE AIR IF ACCIDENTALLY
DEPLOYED AND COULD RESULT IN PERSONAL
INJURY. WHEN CARRYING OR HANDLING AN UNDE-
PLOYED AIRBAG MODULE, THE TRIM SIDE OF THE
AIRBAG SHOULD BE POINTING AWAY FROM THE
BODY TO MINIMIZE POSSIBILITY OF INJURY IF ACCI-
DENTAL DEPLOYMENT OCCURS.
REPLACE AIRBAG SYSTEM COMPONENTS WITH
MOPARTREPLACEMENT PARTS. SUBSTITUTE
PARTS MAY APPEAR INTERCHANGEABLE, BUT
INTERNAL DIFFERENCES MAY RESULT IN INFE-
RIOR OCCUPANT PROTECTION.
WEAR SAFETY GLASSES, RUBBER GLOVES,
AND LONG SLEEVES CLOTHING WHEN CLEANING
POWDER RESIDUE FROM VEHICLE AFTER AIRBAG
DEPLOYMENT. SODIUM HYDROXIDE POWDER
RESIDUE EMITTED FROM A DEPLOYED AIRBAG
CAN CAUSE SKIN IRRITATION. FLUSH AFFECTEDAREA WITH COOL WATER IF IRRITATION IS EXPE-
RIENCED. IF NASAL OR THROAT IRRITATION IS
EXPERIENCED, EXIT THE VEHICLE FOR FRESH AIR
UNTIL THE IRRITATION CEASES. IF IRRITATION
CONTINUES, SEE A PHYSICIAN.
DO NOT USE A REPLACEMENT AIRBAG THAT IS
NOT IN THE ORIGINAL PACKAGING, IMPROPER
DEPLOYMENT AND PERSONAL INJURY CAN
RESULT.
THE FACTORY INSTALLED FASTENERS,
SCREWS AND BOLTS USED TO FASTEN AIRBAG
COMPONENTS HAVE A SPECIAL COATING AND
ARE SPECIFICALLY DESIGNED FOR THE AIRBAG
SYSTEM. DO NOT USE SUBSTITUTE FASTENERS,
USE ONLY ORIGINAL EQUIPMENT FASTENERS
LISTED IN THE PARTS CATALOG WHEN FASTENER
REPLACEMENT IS REQUIRED.
NOTE: Airbags should be stored in a cool dry loca-
tion away from excessive heat and static electrical
activity with the fabric airbag facing UP, or a prema-
ture deployment can result.
If the Driver/Passenger Airbag Module is defective
and not deployed, refer to DaimlerChrysler Corpora-
tion current return list for proper handling proce-
dures.
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE (ACM)
The Airbag Control Module (ACM) contains the
sensing element, safing sensor, and energy reserve
capacitor. The module is mounted on the tunnel/floor
pan between the gear shift lever and the park brake
PLPASSIVE RESTRAINT SYSTEMS 8M - 1

DIAGNOSIS AND TESTING
AIRBAG SYSTEM
(1) Disconnect and isolate the battery negative
cable (Fig. 4).
(2) Connect the DRB llltscan tool to the Data
Link Connector (DLC), located at left side of the
steering column and at the lower edge of the lower
instrument panel (Fig. 5). Ensure that the latest ver-
sion is being used.
(3) Turn the ignition key to ON position. Exit vehi-
cle with the DRB llltscan tool.
(4) After checking that no one is inside the vehicle,
connect the battery negative cable.
(5) Using the DRB llltscan tool, read and record
active Diagnostic Trouble Code (DTC) data.
(6) Read and record any stored DTC's.
(7) Refer to the proper Body Diagnostic Procedures
Manual if any DTC's are found in Step 5 or Step 6.
(8) Erase stored DTC's if there are no active
DTC's. If problems remain, DTC's will not erase.
Refer to the proper Body Diagnostic Procedures Man-
ual to diagnose the problem.If airbag warning
lamp either fails to light, or goes on and stays
on, there is a system malfunction. Refer to the
proper Body Diagnostic Procedures Manual to
diagnose the problem.
SERVICE PROCEDURES
CLEAN UP PROCEDURE
Roll of fold the driver side airbag towards the
steering wheel and tape the airbag module cover over
deployed bag.
Roll or fold the passenger airbag towards the
instrument panel surface and close the door over the
folded bag. Then tape the door shut.
Use a vacuum cleaner to remove any residual pow-
der from the vehicle interior. Work from the outside
in to avoid kneeling or sitting in a contaminated
area. Vacuum the heater and A/C outlets as well. If
the heater or air conditioner was in RECIRC mode at
time of airbag deployment, operate blower motor on
low speed and vacuum powder residue expelled from
the heater and A/C outlets. Multiple vacuum cleaning
may to necessary to decontaminate the interior of the
vehicle.
NOTE: Dispose deployed airbag properly, contact
dealer or government agency for disposal recom-
mendations.
SERVICE OF DEPLOYED AIRBAG MODULE
DRIVER AIRBAG
After a Driver Airbag Module has been deployed
the following components must be replaced because
they cannot be reused. Other driver airbag system
components are replaced if damaged.
²Driver Airbag Module
Fig. 4 Battery Negative Cable Remove/Install
1 ± NEGATIVE CABLE
2 ± NEGATIVE BATTERY POST
Fig. 5 Data Link Connector (DLC) Location
1 ± DATA LINK CONNECTOR (DLC)
2 ± BRAKE PEDAL
PLPASSIVE RESTRAINT SYSTEMS 8M - 3

REMOVAL AND INSTALLATION
DOOR CYLINDER LOCK SWITCH
REMOVAL
(1) Refer to Group 23, Body for door trim and
water shield Removal and Installation.
(2) Remove illuminated entry switch wiring clip
and disconnect connector.
(3) Remove door cylinder lock switch from door
handle.
INSTALLATION
For installation reverse the above procedures.
HOOD AJAR SWITCH
REMOVAL
(1) Open hood.
(2) Disconnect and isolate the battery negative
remote cable (Fig. 3).
(3) Using a trim stick (special tool #C-4755) or
equivalent, gently pry switch up and out of mounting
bracket.
(4) Disconnect wire harness connector from hood
ajar switch.
(5) Remove switch from vehicle.
INSTALLATION
For installation reverse above procedures.
SENTRY KEY IMMOBILIZER MODULE (SKIM)
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
REMOVAL
(1) Disconnect and isolate the battery negative
remote cable (Fig. 3).
(2) Remove Lower Instrument Panel Cover. Refer
to Group 8E-Instrument Panel and Systems, Lower
Instrument Panel Cover Removal and Installation.
(3) Remove the steering column upper and lower
shrouds. Refer to Group 8E-Inatrument Panel and
Systems, Steering Column Shroud Removal and
Installation.
(4) Disengage the steering column wire harness
from the Sentry Key Immobilizer Module (SKIM).
(5) Remove the two screws securing the SKIM
module to the top of the steering column.
(6) Rotate the SKIM and its mounting bracket
upwards and then to the side away from the steering
Fig. 4 Data Link Connector (DLC) Location
1 ± DATA LINK CONNECTOR (DLC)
2 ± BRAKE PEDAL
Fig. 5 Sentry Key Immobilizer Module (SKIM)
Remove/Install
1 ± IGNITION KEY CYLINDER
2 ± STEERING COLUMN
3 ± SENTRY KEY IMMOBILIZER MODULE (SKIM)
4 ± SKIM CONNECTOR
5 ± SKIM ANTENNA
PLVEHICLE THEFT/SECURITY SYSTEM 8Q - 7
SERVICE PROCEDURES (Continued)