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)
HEADLAMP SWITCH
REMOVAL
(1) Remove instrument cluster bezel (Fig. 14).
(2) Remove screws holding the headlamp switch
bezel to cluster bezel.
(3) Disconnect the wire connectors from the head-
lamp switch and wire connector from the power mir-
ror switch.
(4) Remove headlamp switch bezel from cluster
bezel.
INSTALLATION
For installation, reverse the above procedures.
HEADLAMP SWITCH LAMP(S)
REMOVAL
(1) Remove instrument cluster bezel.
(2) Disconnect wire connectors.
(3) Remove headlamp switch bezel from instru-
ment cluster bezel.
(4) Rotate bulb socket counterclockwise one quar-
ter turn (Fig. 15).
(5) Pull bulb socket from headlamp switch.
INSTALLATION
For installation, reverse the above procedures.
HVAC CONTROL LAMP
REMOVAL
(1) Remove radio bezel and HVAC Control (Fig.
16).
(2) Remove rear cover from HVAC control.
(3) Rotate bulb socket counterclockwise one quar-
ter turn.
(4) Pull bulb socket from HVAC.
INSTALLATION
For installation, reverse the above procedures.
INSTRUMENT CLUSTER BACK PANEL
REMOVAL
(1) Remove instrument cluster.
(2) Remove screws holding back panel to instru-
ment cluster (Fig. 17).
(3) Remove back panel.
INSTALLATION
For installation, reverse the above procedures.
INSTRUMENT CLUSTER BEZEL
REMOVAL
(1) Remove steering column cover.
(2) Remove over steering column bezel (Fig. 18).
(3) Remove left end cover.
(4) Remove screw at left end of cluster bezel and
headlamp switch.
Fig. 14 Headlamp Switch
Fig. 15 Headlamp Switch Lamp
Fig. 16 HVAC Control Lamps
8E - 18 INSTRUMENT PANEL AND SYSTEMSNS/GS
REMOVAL AND INSTALLATION (Continued)
(5) Remove screws holding cluster bezel to instru-
ment panel from each side of steering column.
(6) Disconnect clip holding cluster bezel to instru-
ment panel from above right vent louver.
(7) Separate cluster bezel from instrument panel.
(8) Disconnect wire connectors from back of the
bezel.
INSTALLATION
(1) Connect wire connectors into back of the bezel.
(2) Place cluster bezel in position on instrument
panel. Use care not to place hands on louvers.
(3) Connect clips to hold cluster bezel to instru-
ment panel. Use care not to add pressure on the A/C
louvers to seat the cluster bezel clips.
(4) Install screws to hold cluster bezel to instru-
ment panel on each side of steering column.
(5) Install screw at left end of cluster bezel and
headlamp switch.
(6) Install left end cover.
(7) Install over steering column bezel.
(8) Install lower steering column cover.
INSTRUMENT CLUSTER LENS
REMOVAL
(1) Remove instrument cluster.
(2) Remove screws holding lens to instrument clus-
ter (Fig. 19).
(3) Remove lens from cluster.
INSTALLATION
For installation, reverse the above procedures.
INSTRUMENT CLUSTER PRINTED CIRCUIT BOARD
REMOVAL
(1) Remove the instrument cluster.
(2) Remove the instrument cluster back panel.
(3) Disconnect the electronic cluster wire connector
from the printed circuit board (Fig. 20).
(4) Remove the screws holding wire connector
insulator to the instrument cluster shell and the
printed circuit board.
Fig. 17 Instrument Cluster Back Panel
Fig. 18 Instrument Cluster Bezel
Fig. 19 Instrument Cluster Lens
Fig. 20 Instrument Cluster Printed Circuit Board
NS/GSINSTRUMENT PANEL AND SYSTEMS 8E - 19
REMOVAL AND INSTALLATION (Continued)
INSTALLATION
(1) Place message center in position on top cover.
(2) Install screws to hold message center to instru-
ment panel top cover.
(3) Connect wire connector into back of message
center.
(4) Install instrument panel top cover.
(5) Install A-pillar trim.
OVER STEERING COLUMN BEZEL
REMOVAL
(1) Remove the lower steering column cover.
(2) Remove the screws holding over steering col-
umn bezel to the cluster bezel (Fig. 45).
(3) Remove over steering column bezel from vehi-
cle.
(4) Disconnect the clips holding over column bezel
to the cluster bezel.
(5) If equipped with traction control switch, discon-
nect the wire pigtail connector from the traction con-
trol switch.
(6) Remove the over steering column bezel.
INSTALLATION
(1) Place the over steering column bezel in position
and engage clips to the cluster bezel. If equipped
with traction control switch connect the wire pigtail
before engaging clips.
(2) Install the screws to hold the over steering col-
umn bezel to the cluster bezel.
(3) Install the lower column cover.
POWER MIRROR SWITCH
REMOVAL
(1) Remove instrument cluster bezel (Fig. 46).
(2) Disconnect wire connector from back of power
mirror switch.
(3) Disengage lock tabs above and below the mir-
ror switch.
(4) Pull power mirror switch from headlamp
switch bezel.
(5) Remove power mirror switch.
INSTALLATION
For installation, reverse the above procedures.
POWER MIRROR SWITCH LAMP
REMOVAL
(1) Remove instrument cluster bezel (Fig. 47).
(2) Rotate bulb socket counterclockwise one quar-
ter turn.
(3) Pull bulb socket from back of power mirror
switch.
Fig. 45 Over Steering Column Bezel
Fig. 46 Power Mirror Switch
Fig. 47 Power Mirror Switch Lamp
8E - 28 INSTRUMENT PANEL AND SYSTEMSNS/GS
REMOVAL AND INSTALLATION (Continued)
take advantage of low current switching require-
ments in the vehicle. It is plugged into the Junction
Block at positions 4 (Fig. 1) where all wiring associ-
ated with its operation is terminated. The Junction
Block is adjacent to and left of the steering column of
the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Systems.
The combination flasher may be operated in its
hazard warning mode either with or without the igni-
tion circuit being active. However, in order to operate
in the turn signal mode, the ignition circuit must be
completed to the module.
While the combination flasher is idle, there is no
current drawn through the module. The device does
not become active until a signal ground circuit is
supplied to either of the turn signal inputs or the
hazard warning input.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each drawing a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground drawing a max-
imum of 600 mA. through the multi-function switch.
COMBINATION FLASHER / DAYTIME RUNNING
LAMPS (DRL) MODULE
The Combination Flasher/DRL is a module provid-
ing turn signal, hazard warning, and daytime run-
ning light functions, and has been designed with
internal relays to take advantage of low current
switching requirements in the vehicle. It is plugged
into the junction block at positions 3 AND 4 (Fig. 2)
where all wiring associated with its operation is ter-
minated. The Junction Block is adjacent to and left of
the steering column of the vehicle.
To gain access to the device, remove the lower
steering column cover and knee blocker, refer to
Group 8E, Instrument Panel and Gauges.
The combination flasher/DRL may be operated in
its hazard warning mode either with or without the
ignition circuit being active. However, in order to
operate in the turn signal mode or the DRL mode,
the ignition circuit must be completed to the module.
While the combination flasher portion is idle, there
is no current drawn through the module. The devicedoes not become active in the turn signal or hazard
warning modes until a signal ground circuit is sup-
plied to either of the turn signal inputs or the hazard
warning input. With the ignition OFF, there is no
current drawn through the module.
While the ignition is ON, the front turn signal fil-
aments are illuminated steadily thus providing the
DRL function. The DRL function may be inhibited by
applying a signal ground input from either the park
brake circuit or the headlamp relay activation circuit.
Typical flash rate for the flasher is 90 flashes per
minute.
When a lamp is burnt out for a given side of the
vehicle or a wire is open to a lamp, the flash rate will
increase to 180 flashes per minute when in the turn
signal mode. When in the hazard warning signal
mode the flash rate remains at 90 flashes per
minute.
Turn signal inputs that actuate the flasher are low
current grounds, each could draw a maximum of 300
mA., and are provided to the flasher through the
Junction Block from the multi-function switch that is
mounted to the steering column. The hazard warning
signal input is a low current ground that could draw
a maximum of 600 mA. through the multi-function
switch.
DIAGNOSIS AND TESTING
TURN SIGNAL MULTI-FUNCTION SWITCH
To test turn signal, headlamp beam select and opti-
cal horn portion of the multi-function switch:
(1) Remove the multi-function switch, refer to
removal procedures.
(2) Using an ohmmeter check continuity reading
between multi-function switch pins. Refer to (Fig. 3)
for proper pin numbers and Turn Signal Multi-Func-
tion Switch Test chart.
Fig. 2 Junction Block Terminal Pins
8J - 2 TURN SIGNAL AND FLASHERSNS
DESCRIPTION AND OPERATION (Continued)
JUNCTION BLOCK TERMINAL CALL-OUT WITH DRL
CAV. CKT. WIRE
GAUGECOLOR FUNCTION
1 L09 18 BLK/WT BATTERY INTPUT MAIN FEED
2 L61 18 LG LEFT FRONT T/S OUTPUT TO LAMP
3 L60 18 TN RIGHT FRONT T/S OUTPUT TO LAMP
4 L63 18 DG/RD LEFT REAR T/S OUTPUT TO LAMP
5 L62 18 BR/RD RIGHT REAR T/S OUTPUT TO LAMP
6 A22D 20 BK/OR IGNITION INPUT SENSE ONLY
7 L305 22 LB/WT LEFT T/S SWITCH INPUT SENSE ONLY
8 L302 22 LB/YL RIGHT T/S SWITCH INPUT SENSE ONLY
9 L91 22 DB/PK HAZARD SWITCH INPUT SENSE ONLY
10 G09 22 GY/BK PARK BRAKE SWITCH INPUT SENSE ONLY
11 Z01 14 BK GROUND MAIN GRD.
12 L93 22 RD/YL HEADLAMP RELAY SWITCH
INPUTSENSE ONLY
NSTURN SIGNAL AND FLASHERS 8J - 5
DIAGNOSIS AND TESTING (Continued)
CONDITION POSSIBLE CAUSES CORRECTION
TURN SIGNAL AND HAZARD
WARNING FLASHERS
FUNCTION PROPERLY BUT
DAYTIME RUNNING LIGHTS
(DRL) DO NOT COME ON WHILE
DRIVING
(The brake lamp in the message
center remains illuminated under
the circumstances noted to the
right in step #3.0 through 3.5
unless the lamp is burned out.)
(Headlamps, either low or high
beam, remain illuminated under
the circumstances noted to the
right in step #4.0 through 4.3 even
though the headlamp switch is
OFF.)1. FAULTY GROUND FEED TO
JUNCTION BLOCK FROM
GROUND STUD CONNECTOR
THROUGH I/P HARNESS.
2. FAULTY GROUND FEED
THROUGH JUNCTION BLOCK TO
CAVITY #11 IN POSITION #3 OF
THE JUNCTION BLOCK.
3.0. FAULTY PARK BRAKE
SWITCH.
3.1. PARK BRAKE INPUT CIRCUIT
FALSELY GROUNDED. COULD BE
THE G09 CIRCUIT WHICH IS A
(20) GA. GY/BK WIRE BETWEEN
THE MESSAGE CENTER AND THE
JUNCTION BLOCK,
3.2. OR BETWEEN THE PARK
BRAKE SWITCH AND THE
JUNCTION BLOCK,
3.3. OR BETWEEN THE BRAKE
PRESSURE SWITCH AND THE
JUNCTION BLOCK,
3.4. OR BETWEEN THE IGNITION
SWITCH AND THE JUNCTION
BLOCK,
3.5. OR A SHORTED IGNITION
SWITCH (CONTACT SHOULD
ONLY BE MADE WHEN IN START
POSITION).
4.0. L93 CIRCUIT FALSELY
GROUNDED BETWEEN JUNCTION
BLOCK AND MULTI-FUNCTION
SWITCH.
4.1. L307 CIRCUIT FALSELY
GROUNDED BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. HEADLAMP SWITCH
SHORTED.
4.3. HEADLAMP CONTROL
OUTPUT FALSELY GROUNDED BY
BODY CONTROL MODULE.1. REPLACE GROUND CIRCUIT TO
JUNCTION BLOCK.
2. REPLACE JUNCTION BLOCK.
3.0. REPLACE THE PARK BRAKE
SWITCH.
3.1-3.4. REPAIR THE G09 CIRCUIT
TO ELIMINATE THE FALSE
GROUND SOURCE.
3.5. REPLACE IGNITION SWITCH.
4.0. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
JUNCTION BLOCK AND MULTI-
FUNCTION SWITCH.
4.1. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. REPLACE SHORTED
HEADLAMP SWITCH.
4.3. REPLACE BODY CONTROL
MODULE.
8J - 10 TURN SIGNAL AND FLASHERSNS
DIAGNOSIS AND TESTING (Continued)