(3) Disconnect two wire connectors from bottom of
Body Control Module (BCM)
(4) Remove bolts holding Junction Block to dash
panel mounting bracket (Fig. 8).
(5) Remove Junction Block from mounting bracket.
(6) Remove screws holding Body Control Module to
Junction Block.
(7) Slide Body Control Module downward to disen-
gage guide studs on Junction Block from channels on
BCM mounting bracket.
(8) Remove Body Control Module from Junction
Block.
INSTALLATION
For installation, reverse the above procedures.
INSTRUMENT CLUSTER LENS - MECHANICAL
TRANSMISSION RANGE INDICATOR (PRND21)
REMOVAL
(1) Remove the instrument cluster and disconnect
the range indicator cable at both attaching points.
Refer to Instrument Cluster with Mechanical Trans-
mission Range Indicator Reval and Installation pro-
cedures.
(2) Remove the screws holding the cluster lens to
the rear shell from around perimeter of lens.
(3) Remove the lens from the cluster, guide the
shift indicator cable through cluster shell.
(4) Remove the screws holding the shift indicator
to the lens.
INSTALLATION
(1) Install the shift indicator and screws to cluster
lens.
(2) Position the lens on cluster and carefully guide
the shift indicator cable and guide through cluster
opening.
(3) Install the cluster lens and screws to the rear
shell around perimeter of lens.
(4) Install the instrument cluster.
INSTRUMENT CLUSTER ELECTRONIC ODOMETER
AND TRANSMISSION RANGE INDICATOR
REMOVAL
(1) Remove instrument cluster.
(2) Remove cluster lens.
(3) Disconnect wire connector from odometer and
transmission range indicator.
(4) Remove screws holding odometer and transmis-
sion range indicator to cluster shell.
(5) Remove odometer and transmission range indi-
cator from cluster.
INSTALLATION
(1) Install odometer and transmission range indi-
cator and attach to cluster shell.
(2) Connect wire connector into odometer and
transmission range indicator.
(3) Install cluster lens.
(4) Install instrument cluster.
GLOVE BOX
REMOVAL (FIG. 4)
(1) Open glove box (Fig. 9).
(2) Disengage clip holding checkstraps to glove box
door.
(3) Pivot glove box downward and disengage hinge
hooks from instrument panel.
(4) Remove glove box.
INSTALLATION
(1) Place glove box in position.
(2) Engage hinge hooks into instrument panel and
pivot glove box upward.
(3) Engage clip to hold checkstraps to glove box
door.
(4) Close glove box door.
GLOVE BOX LAMP AND SWITCH
REMOVAL
(1) Open glove box door (Fig. 10).
(2) Using a trim stick, lightly pry glove box lamp/
switch from instrument panel.
(3) Disengage wire connector from glove box lamp
and switch.
Fig. 8 Body Control Module Location
NSINSTRUMENT PANEL AND SYSTEMS 8E - 19
REMOVAL AND INSTALLATION (Continued)
INSTRUMENT CLUSTER
The mechanical instrument cluster with a tachom-
eter is equipped with a electronic vacuum fluorescent
odometer, and trip odometer display.
The instrument cluster is equipped with the follow-
ing warning lamps (Fig. 2).
²Battery Voltage
²Lift Gate Ajar²Low Coolant
²Low Windshield Washer Fluid Level
²Door Ajar
²Glow Plug Indicator
²Low Fuel Level
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
GS vehicle instrument clusters are equipped with a
self diagnostic test feature to help identify electronic
problems. Prior to any test, perform Self Diagnostic
Test. The self diagnostic system monitors the CCD
bus messages. If an electronic problem occurs, a
Diagnostic Trouble Code (DTC) will be displayed in
the odometer window of the cluster.
The following CCD bus messages are continuously
monitored by the diagnostic system:
²Body Control Module
²Powertrain Control Module
HEADLAMP SWITCH
Using a Digital Multimeter, equipped with a diode
test to perform the Headlamp Switch Test below (Fig.
3).
Switch position possibilities are open (no continu-
ity), continuity, resistance value in ohms, or diode
test. Use the values in the third column to determine
meter setting. If Headlamp Switch is not within spec-
ifications replace as necessary.
Fig. 2 Instrument Cluster
Fig. 1 Headlamp and Mirror Switch Lamps
8E - 2 INSTRUMENT PANEL AND SYSTEMSNS/GS
DESCRIPTION AND OPERATION (Continued)
SELF DIAGNOSTIC TEST
With the ignition switch in the OFF position,
depress the TRIP and RESET buttons. While holding
the TRIP and RESET button turn the ignition switch
ON. Continue to hold the TRIP and RESET buttons
until the word CODE appears in the odometer win-
dows (about five seconds). If a problem exists, the
system will display diagnostic trouble codes. If no
problem exists the code 999 (End Test) will momen-
tarily appear.
DIM TEST
When CHEC-0 is displayed in the odometer win-
dow, the cluster's vacuum fluorescent (VF) displays
will dim down. If the VF display brightness does not
change, a problem exists in the cluster.
CLUSTER CALIBRATION TABLE
Speedometer Calibration Point
1 ...........................0Km/h (0 mph)
2 .........................40Km/h (20 mph)
3 .........................80Km/h (55 mph )
4 ........................120Km/h (75 mph)
Tachometer Calibration Point
1 ...................................0rpm
2 ................................1000 rpm
3 ................................3000 rpm
4 ................................4000 rpm
Fuel Gauge Calibration Point
1 ...............................Empty (E)
2 ................................1/8Filled
3 ................................1/4Filled
4..................................Full (F)
Temp Gauge Calibration Point
1 .................................Cold (C)
2 ..............................LowNormal
3 .............................High Normal
4 ..................................Hot(H)
Fig. 3 Headlamp Switch Test
INSTRUMENT CLUSTER DTC CHART
DTC DESCRIPTION
110 Memory Fault in cluster
111 Calibration fault in cluster
921 Odometer fault from BCM
940 No tachometer messages from BCM
NS/GSINSTRUMENT PANEL AND SYSTEMS 8E - 3
DIAGNOSIS AND TESTING (Continued)
CALIBRATION TEST
When CHEC-1 is displayed in the odometer win-
dow, each of the cluster's gauge pointers will move
sequentially through each calibration point. The Cal-
ibration Table contains the proper calibration points
for each gauge. If the gauge pointers are not cali-
brated, a problem exists in the cluster. If any gauge
is out of calibration it will have to be calibrated using
a scan tool (DRB III). Refer to the proper Body Diag-
nostic Procedure Manual for calibration procedures.
ODOMETER SEGMENT TEST
When CHEC-2 is displayed in the odometer win-
dow, each digit of the odometer will illuminate
sequentially. If a segment in the odometer does not
illuminate normally, a problem exists in the display.
CONDITIONS
Refer to the following charts for possible/problems/
causes and corrections.
²Instrument Cluster
²Speedometer
²Tachometer
²Fuel Gauge
²Temperature Gauge
²Odometer
8E - 4 INSTRUMENT PANEL AND SYSTEMSNS/GS
DIAGNOSIS AND TESTING (Continued)
OVERHEAD CONSOLE
CONTENTS
page page
DESCRIPTION AND OPERATION
COMPASS MINI-TRIP COMPUTER (CMTC).... 1
COMPASS/TEMPERATURE MINI TRIP
COMPUTER SELF-DIAGNOSTIC TEST....... 1
THERMOMETER AND COMPASS............ 2
UNIVERSAL TRANSMITTER................ 2
DIAGNOSIS AND TESTING
READING/DOME LAMP DIAGNOSIS......... 3
TRAVELER MESSAGES.................... 3
UNIVERSAL TRANSMITTER................ 3
SERVICE PROCEDURES
COMPASS CALIBRATION PROCEDURE (FAST
METHOD)............................. 4
COMPASS CALIBRATION PROCEDURE....... 4
DEMAGNETIZING PROCEDURE............. 4UNIVERSAL TRANSMITTER................ 5
REMOVAL AND INSTALLATION
AMBIENT TEMPERATURE SENSOR.......... 5
COMPASS MINI-TRIP COMPUTER (CMTC)
LAMP BULBS......................... 6
COMPASS MINI-TRIP COMPUTER (CMTC)
MODULE............................. 6
FRONT HEADER READING/COURTESY LAMP . . 6
OVERHEAD CONSOLE.................... 6
READING/COURTESY LAMP ASSEMBLY...... 7
READING/COURTESY LAMP............... 6
UNIVERSAL TRANSMITTER................ 7
SPECIAL TOOLS
SPECIAL TOOL.......................... 9
DESCRIPTION AND OPERATION
COMPASS/TEMPERATURE MINI TRIP COMPUTER
SELF-DIAGNOSTIC TEST
The CMTC is capable of performing a diagnostic
self check on many of its internal functions. CMTC
diagnostics may be performed using a scan tool
(DRB) and the proper Body Diagnostic Procedures
manual or by the following procedure.
(1) With the ignition switch in the OFF position,
press both the US/M and STEP button.
(2) Turn ignition switch to the ON position.
The CMTC will perform internal checks while
lighting all segments of the vacuum florescent dis-
play. Upon completion of the internal check, the
CMTC will display.
²PASS
²FAIL
²CCd
If any segment of the CMTC fails to light replace
the module.
If FAIL is displayed, replace the module.
If CCd is displayed, check the CCD and Body Con-
trol Module (BCM) for proper operation, refer to the
appropriate diagnostic test procedures manual If the
CCD and the BCM are OK, replace the CMTC mod-
ule.
For additional diagnostic information on the CMTC
and for identifying CMTC problems, refer to the
proper Body Diagnostic Procedures manual.
COMPASS MINI-TRIP COMPUTER (CMTC)
The Compass Mini-Trip Computer (CMTC) system
is located in the overhead console. CMTC consists of
a electronic control module with a vacuum fluores-
cent display (VFD) and function switches. The CMTC
consists of a electronic module that displays compass,
trip computer, and temperature features. Actuating
the STEP switch will cause the CMTC to change
mode of operation when ignition is ON. Example:
²Compass/Temperature
²Trip odometer (ODO)
²Average miles per gallon (ECO)
²Instant miles per gallon (ECO)
²Distance to empty (DTE)
²Elapsed time (ET)
²Off
The CMTC module in the overhead console has
three buttons used to select various functions. The
CMTC selector buttons will not operate until the
ignition is in the RUN position (Fig. 1).
When the ignition switch is first turned to the
RUN position the CMTC display;
²Blanks momentarily
²All segments of the VFD will light for one sec-
ond
²Blanks momentarily
²Returns to the last mode setting selected before
the ignition was last switched OFF.
NSOVERHEAD CONSOLE 8V - 1
Component Page
Fuel Tank Module...................8W-30, 45
Fuel Temperature Sensor.................8W-30
Fuel Timing Solenoid....................8W-30
Fuses (JB)............................8W-12
Fuses (PDC)...........................8W-10
Fusible Link.....................8W-20, 21, 63
Fusible Link A0........................8W-30
Fusible Link A11.......................8W-10
Fusible Link A54.......................8W-10
Grounds..............................8W-15
Generator.............................8W-20
Glove Box Lamp........................8W-44
Glow Plug Lamp.....................8W-30, 46
Glow Plugs............................8W-30
Glow Plug Relay........................8W-30
Headlamps............................8W-50
Headlamp Dimmer Switch..........8W-10, 46, 50
Headlamp Leveling Motors...............8W-50
Headlamp Switch.......................8W-50
Headlamp Washer......................8W-53
High Beam Indicator....................8W-46
High Beam Relay....................8W-10, 50
Headlamps............................8W-50
Horns................................8W-41
Hood Ajar Switch....................8W-39, 44
Horn Relay.........................8W-39, 41
Horn Switch.....................8W-10, 39, 41
HVAC Control.........................8W-42
Idle Air Control Motor...................8W-30
Ignition Coil Pack.......................8W-30
Ignition Switch.........................8W-10
Instrument Cluster.....................8W-40
Intake Air Temperature Sensor............8W-30
Intake Air Temperature/Manifold Absolute
Pressure Sensor.....................8W-30
Interior Lamps On Switch................8W-44
Junction Block.........................8W-12
Key-In Halo Lamp......................8W-44
Knock Sensor..........................8W-30
Lamp Assemblies.......................8W-51
License Lamp..........................8W-51
Liftgate Ajar Indicator Lamp..............8W-40
Liftgate Ajar Switch...............8W-39, 40, 44
Liftgate Arm/Disarm Switch............8W-39, 61
Liftgate Flood Lamps....................8W-44
Liftgate Lock Motor.....................8W-61
Low Beam Relay.....................8W-10, 50
Low Coolant Level Switch................8W-45
Low Fuel Warning Indicator Lamp..........8W-40
Low Oil Pressure Lamp..................8W-46
Low Washer Fluid Level Indicator Lamp.....8W-40
Low Washer Fluid Switch.................8W-53
Low/Reverse Pressure Switch..............8W-31
Low/Reverse Solenoid....................8W-31Component Page
Manifold Absolute Pressure Sensor.........8W-30
Memory Power Seat Switch...............8W-63
Seat Sensors...........................8W-63
Memory Seat/Mirror Module...........8W-62, 63
Memory Set Switch..................8W-62, 63
Message Center........................8W-46
Mid Reading Lamps.....................8W-44
Mode Door Actuator.....................8W-42
Name Brand Speaker Relay...............8W-47
Needle Movement Sensor.................8W-30
Odometer.............................8W-40
Output Shaft Speed Sensor...............8W-31
Overdrive Pressure Switch................8W-31
Overdrive Solenoid......................8W-31
Overhead Console.......................8W-49
Park Brake Switch...................8W-46, 50
Park Lamp Relay.........8W-10, 12, 44, 50, 51, 54
Park/Turn Signal Lamps.................8W-50
Airbag Squibs..........................8W-43
Power Distribution Center................8W-10
Power Folding Mirror Switch..............8W-62
Power Mirror Fold Relay.................8W-62
Power Mirror Switch....................8W-62
Power Mirror Unfold Relay...............8W-62
Power Seat Circuit Breaker............8W-62, 63
Powertrain Control Module...............8W-30
PTCs (JB).............................8W-12
Radiator Fan Disconnect.................8W-42
Radiator Fan Relays.....................8W-42
Radio................................8W-47
Radio Choke...........................8W-47
Reading Lamps........................8W-44
Rear A/C Heater Unit....................8W-42
Rear Blower Control Switches.............8W-42
Rear Cigar Lighter/Power Outlet...........8W-41
Rear Defogger On Indicator...............8W-42
Rear Dome Lamp.......................8W-44
Rear Fog Lamp.........................8W-51
Rear Fog Lamp Indicator.................8W-51
Rear Washer Motor.....................8W-53
Rear Washer Switch..................8W-42, 53
Rear Window Defogger...................8W-48
Rear Window Defogger Relay..............8W-48
Rear Window Defogger Switch..........8W-42, 48
Rear Wiper Delay On Indicator.........8W-42, 53
Rear Wiper Delay Switch..............8W-42, 53
Rear Wiper Motor.......................8W-53
Rear Wiper On Indicator..............8W-42, 53
Rear Wiper On Switch................8W-42, 53
Recirculate Mode Indicator................8W-42
Recirculate Mode Switch.................8W-42
Recirculation Door Actuator...............8W-42
Remote Keyless Entry Module.............8W-61
Repeater Lamps.....................8W-51, 52
8W - 02 - 2 8W - 02 COMPONENT INDEXNS/GS
Component Page
Seat Belt Indicator Lamp.................8W-40
Seat Belt Switch........................8W-40
Sentry Key Immobilizer Module............8W-39
Service Engine Soon Lamp.............8W-30, 46
Sliding Door Contacts....................8W-61
Sliding Door Lock Motors.................8W-61
Speed Control Switches...............8W-30, 33
Speedometer...........................8W-40
Stop Lamp Switch...................8W-33, 51
Stop/Turn Signal Relays..................8W-54
Tachometer............................8W-40
Tail/Stop Lamp.........................8W-51
Tail/Turn Signal Lamp................8W-51, 52
Throttle Position Sensor..................8W-30
Traction Control Switch..................8W-35
Trailer Tow Connector...................8W-54
Transmission Control Module..............8W-31
Transmission Control Relay............8W-10, 31
Transmission Control Solenoids............8W-31
Transmission Range Sensor...............8W-31
Trip Odometer.........................8W-40Component Page
Turbine Speed Sensor....................8W-31
Turbo Boost Pressure Sensor..............8W-30
Turn Indicators......................8W-46, 52
Turn Signal/Hazard Switch............8W-46, 52
Underdrive Solenoid.....................8W-31
Universal Garage Door Opener............8W-49
Vacuum Solenoid.......................8W-33
Vehicle Speed Control Servo...............8W-33
Vehicle Speed Sensor....................8W-30
Vent Motors...........................8W-60
Vent Solenoids.........................8W-33
Visor/Vanity Mirror Lamps................8W-44
Voltage Regulator.......................8W-20
Volts Indicator Lamp....................8W-40
VTSS Lamp........................8W-39, 46
Washer Module.........................8W-53
Wheel Speed Sensors....................8W-35
Wiper High/Low Relay...................8W-53
Wiper Module..........................8W-53
Wiper On Relay........................8W-53
NS/GS8W - 02 COMPONENT INDEX 8W - 02 - 3
8W-40 INSTRUMENT CLUSTER
Component Page
A/C Heater Control....................8W-40-4
AW4B13............................8W-40-2
Body Control
Module........8W-40-2, 3, 4, 5, 6, 7, 8, 9, 10, 11
BS05........................8W-40-5, 6, 8, 10
BS06........................8W-40-5, 6, 8, 10
BS30...............................8W-40-7
BS40...............................8W-40-7
Clockspring......................8W-40-10, 11
Cluster Illumination Lamps.............8W-40-4
Cruise Indicator Lamp..............8W-40-10, 11
Data Link Connector...................8W-40-9
Door Ajar Indicator Lamp...............8W-40-3
Driver Door Ajar Switch................8W-40-3
Electronic PRNDL Indicator.............8W-40-5
Engine Coolant Temperature Gauge.....8W-40-8, 9
Engine Coolant Temperature Sensor.....8W-40-8, 9
Engine Speed Sensor...................8W-40-7
ES13........................8W-40-5, 6, 8, 10
ES14........................8W-40-5, 6, 8, 10
ES30...............................8W-40-7
Fuel Gauge..........................8W-40-2
Fuel Tank Module.....................8W-40-2
Fuse 2 (JB)..............8W-40-2, 3, 4, 5, 6, 8, 10
Fuse 28 (PDC)........................8W-40-2
G200...............................8W-40-2
G300...............................8W-40-4
G301...............................8W-40-7
G302...............................8W-40-3
G400...............................8W-40-3Component Page
Ignition Switch.....................8W-40-2, 4
Instrument Cluster............8W-40-2, 3, 4, 5, 6,
7, 8, 9, 10, 11
Junction Block...........8W-40-2, 3, 4, 5, 6, 8, 10
Left Rear Door Ajar Switch..............8W-40-3
Left Speed Control Switch...........8W-40-10, 11
Liftgate Ajar Indicator Lamp.............8W-40-3
Liftgate Ajar Switch...................8W-40-3
Low Fuel Warning Indicator Lamp........8W-40-2
Low Washer Fluid Level
Indicator Lamp.................8W-40-10, 11
Low Washer Fluid Switch...........8W-40-10, 11
Memory Seat/Mirror Module.............8W-40-2
Odometer............................8W-40-5
Passenger Door Ajar Switch.............8W-40-3
Power Distribution Center..............8W-40-2
Powertrain Control
Module..............8W-40-5, 6, 7, 8, 9, 10, 11
PS01............8W-40-2, 3, 4, 5, 6, 7, 8, 9, 10, 11
PS02............8W-40-2, 3, 4, 5, 6, 7, 8, 9, 10, 11
Right Rear Door Ajar Switch.............8W-40-3
Right Speed Control Switch..........8W-40-10, 11
Seat Belt Indicator Lamp...............8W-40-4
Seat Belt Switch......................8W-40-4
Speedometer.......................8W-40-6, 7
Tachometer........................8W-40-6, 7
Transmission Control Module..........8W-40-5, 6
Trip Odometer........................8W-40-5
Vehicle Speed Sensor.................8W-40-6, 7
Voltage Indicator Lamp...............8W-40-8, 9
NS/GS8W - 40 INSTRUMENT CLUSTER 8W - 40 - 1