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INSTRUMENT PANEL AND GAUGES
8E - 1
INSTRUMENT PANEL AND GAUGES
CONTENTS
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GRAPHIC DISPLAY MODULE ..............
INSTRUMENT CLUSTER DIAGNOSIS .........
INSTRUMENT CLUSTER GENERAL
INFORMATION .........................
INSTRUMENT CLUSTER SERVICE
PROCEDURES .........................
INSTRUMENT PANEL SERVICE
PROCEDURES ........................
VEHICLE INFORMATION CENTER (VIC) ......
INSTRUMENT CLUSTER GENERAL INFORMATION
With the ignition switch in the RUN or START
position, voltage applied to the instrument cluster is
limited by the gauges fuse. The voltage applied to the
instrument cluster is applied to all the gauges and
indicators through the instrument cluster printed cir-
cuit.
With the ignition switch in the OFF position, volt-
age is not applied to the instrument cluster and the
gauges do not indicate any vehicle condition.
TACHOMETER
The tachometer displays the engine speed, (RPM).
With the engine running, the tachometer receives an
engine speed signal from the PCM pin 43 (calibration
values shown in Specifications chart).
FUEL GAUGE
The fuel gauge pointer position is controlled by a
magnetic field created by electrical current flow
through the coils within the gauge. A change in the
amount of current flow will change the magnetic field
which changes the pointer position. The fuel level
sender is a variable resistor that changes electrical
resistance depending on the level of fuel in the tank.
As the resistance changes, the current changes and
the pointer moves to a new position (calibration val-
ues shown in Specifications chart).
VOLTMETER
The voltmeter measures the output of the generator
when the engine is running. When the engine is not
running the voltmeter measures battery voltage.
OIL PRESSURE GAUGE
The oil pressure gauge pointer position is controlled
by a magnetic field created by electrical current flow
through the coils within the gauge. A change in the
amount of current flow will change the magnetic field
which changes the pointer position. The oil pressure
sender is a variable resistor that changes resistance
with a change in oil pressure (calibration values
shown in Specifications chart).
LOW FUEL WARNING
The low fuel warning indicator glows when the fuel
tank holds approximately 4 gallons. A low fuel warn-
ing module controls when the indicator will light.
When the module senses 66.5 ohms or less from the
fuel level sender for 10 continuous seconds, the indi-
cator will light. The indicator will remain on until the
module senses 63.5 ohms or more from the fuel
sender for 20 continuous seconds.
COOLANT TEMPERATURE GAUGE
The coolant temperature gauge pointer position is
controlled by a magnetic field. This field is created by
electrical current flowing through the coils within the
gauge. A change in the amount of current flow will
change the magnetic field which changes the pointer
position. The coolant temperature sensor is a ther-
mistor that provides a different electrical resistance
for different temperatures of the coolant. As the resis-
tance changes, the current changes and the pointer
moves to a new position (calibration values shown in
Specifications chart).
UPSHIFT INDICATOR
Vehicles equipped with manual transmissions have
an optional Up-Shift indicator lamp. The lamp is
controlled by the PCM. The lamp illuminates to indi-
cate when the driver should shift to the next highest
gear for best fuel economy. The engine controller will
turn the lamp OFF after 3 to 5 seconds if the shift of
gears is not performed. The shift light will remain off
until the vehicle stops accelerating and is brought
back to the range of shift light operation or shifted
into fifth gear.
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The indicator lamp is normally illuminated when
the ignition switch is turned ON and it is turned OFF
when the engine is started up. The lamp will be
illuminated during engine operation according to en-
gine speed and load.
SECURITY LAMP
The Security Lamp illuminates when the Security
system has been properly armed. The lamp will flash
for 15 seconds, indicating that arming is in progress.
Note that this 15 second arming will start after the
Illuminated Entry has timed out (courtesy lamps
out). Refer to Group 8Q - Vehicle Theft Security Sys-
tem.
BRAKE INDICATOR
The brake indicator warns the driver that the park-
ing brake is on or that the pressure in the brake
system is unequal.
Voltage is applied through the brake indicator bulb
to three switches. A path to ground for the current is
available if:
²
The brake warning switch is closed (with unequal
brake system pressures), or
²
CHECK ANTI-LOCK LAMP
This light monitors the Anti-Lock Brake System.
This light will come on when the ignition key is
turned to the ON position and may stay on for as long
as thirty seconds. If the Anti-Lock light remains on or
comes on during driving, it indicates that the Anti-
Lock portion of the brake system is not functioning.
Refer to Group 5 - Brakes for further information.
The ignition switch is in START (to test the bulb),
The park brake switch is closed (with the park
brake on).
AIR BAG
This red light monitors the Air Bag system. This
light will come on when the ignition key is turned to
the ON position and should light for 6 to 8 seconds. If
the Air Bag light remains on or comes on during
driving, it indicates that the Air Bag system is not
functioning.
If air bag warning lamp either fails to light, or
goes on and stays on, there is a system malfunc-
tion. Refer to the Passive Restraint Diagnostic
Test Manual to diagnose the problem.
MALFUNCTION INDICATOR (CHECK ENGINE LAMP)
The Check Engine Lamp illuminates at the bottom
of the instrument cluster each time the ignition key is
turned on. It will stay on for 3 seconds as a bulb test.
If the PCM receives an incorrect signal or no signal
from certain sensors or emission related systems the
lamp is turned on (pin 32 of PCM). This is a warning
that the PCM has recorded a system or sensor mal-
function. In some cases when a diagnostic trouble
code is declared the PCM will go into a limp-in mode
in an attempt to keep the system operating. It signals
an immediate need for service.
The lamp can also be used to display diagnostic
trouble codes. Cycle the ignition switch on, off, on, off,
on within 5 seconds. This will allow any trouble codes
stored in the control module memory to be displayed
in a series of flashes representing digits.
HAZARD FLASHER INDICATOR (CANADA)
Illuminates when the hazard switch on top of the
steering column is depressed.
MASTER LIGHTING INDICATOR (CANADA)
Illuminates when the headlamps are turned ON.
or
²
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INSTRUMENT PANEL AND GAUGES
8E - 3
INSTRUMENT CLUSTER DIAGNOSIS
If the entire cluster is inoperative check fuse
22 in the fuse panel. Replace as required.
SPEEDOMETER/OIL PRESSURE GAUGE/AIR BAG
LAMP
UPSHIFT INDICATOR
MALFUNCTION INDICATOR (CHECK ENGINE)
BRAKE INDICATOR
CHECK ANTI-LOCK (ABS)
If all these are inoperative check for an open in the
IGN line to cluster connector terminal C12.
If C12 has ignition voltage continue with the diag-
nostics of the appropriate item.
SPEEDOMETER
(1) Raise the vehicle.
(2) Disconnect the vehicle speed sensor connector.
(3) Connect a voltmeter between the black wire pin
of the connector and ground.
(4) Turn the ignition key to the RUN position.
(5) Check for approximately 5 volts. If OK, perform
vehicle speed sensor test. Refer to the appropriate
Vehicle Diagnostics Test Procedures Manual. If not
OK, continue with step 6.
(6) Turn ignition key to OFF position.
(7) Check continuity between distance (speed) sen-
sor connector and cluster connector terminal C7. If
OK, replace speedometer. If not OK, repair open cir-
cuit.
Fig. 2 Oil Pressure Sending Unit—4.0L
(3) Touch Oil Pressure Sender connector to ground.
Needle goes to Low.
(4) If OK, replace sender. If not, check for an open
to gauge (instrument cluster connector terminal C9).
Repair open as required. If no open is found, replace
gauge.
AIR BAG LAMP
(1) Turn ignition switch to RUN.
(2) Ground instrument cluster connector pin C11.
Lamp should light. If not, replace bulb. If OK, con-
tinue with step 3.
(3) Turn key to OFF. Disconnect and isolate the
battery negative (ground) cable. Check for continuity
between connector pin C11 and pin 3 of the air bag
diagnostic module connector. If OK, replace ASDM
(refer to Group 8M- Restraint Systems).
OIL PRESSURE GAUGE INOPERATIVE
(1) Turn ignition switch to RUN.
(2) Disconnect Oil Pressure Sender connector.
Needle goes to High. If not, go to step 2.
UPSHIFT INDICATOR
(1) Turn ignition switch to RUN.
(2) Ground instrument cluster connector pin C8.
Lamp should light. If not, replace bulb. If OK, con-
tinue with step 3.
(3) Turn Key to OFF. Check for continuity between
connector pin C8 and pin 54 of the PCM. If OK,
replace PCM. If not, repair open.
MALFUNCTION INDICATOR (CHECK ENGINE)
(1) Turn ignition switch to RUN.
(2) Jumper cluster connector terminal C5 to
ground. Lamp should light. If bulb is OK, check for
open circuit between C5 and powertrain control mod-
ule pin 32. If OK, replace PCM.
Fig. 1 Oil Pressure Sending Unit—5.2L
BRAKE INDICATOR
Jumper cluster connector terminal C4 to ground.
Lamp should light. If bulb is OK, check for continuity
to brake pressure warning switch and park brake
switch.
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CHECK ANTI-LOCK (ABS)
(1) Turn ignition switch to RUN.
(2) Jumper instrument cluster connector terminal
C3 to ground. Lamp should light. If bulb is OK, check
for continuity between C3 and pin 53 of the ABS
module. Refer to Group 5 - Brakes.
LOW FUEL WARNING INOPERATIVE
(1) Perform Fuel Gauge test.
The Fuel Gauge
and Low Fuel use the same line. If one is not
working properly the other must also be incor-
rect.
(2) If the Low Fuel is still inoperative, replace bulb.
To replace the Low Fuel Module, replace the
Tachometer.
VOLTMETER/TACHOMETER/FUEL GAUGE/LOW
FUEL INOPERATIVE
If all these are inoperative check for an open in the
B+ line to cluster connector terminal D4.
If D4 has battery voltage continue with the diagnos-
tics of the appropriate item.
COOLANT TEMPERATURE GAUGE INOPERATIVE
(1) Check for an open in the B+ line to cluster
connector terminal D9. If D9 has battery voltage con-
tinue with the next step. If D9 has no voltage repair
as required.
(2) Turn ignition switch to RUN.
(3) Disconnect Coolant Temperature Sender con-
nector. Needle goes to Low. If not, go to step 3.
(4) Touch Coolant Temperature Sender connector to
ground. Needle goes to High. If OK, replace sender. If
not, check for an open between sender and gauge. If
OK, replace gauge.
VOLTMETER
If cluster connector terminal D4 has battery volt-
age, replace meter.
TACHOMETER INOPERATIVE
Tachometer input is from the powertrain control
module (PCM) pin 43 to cluster connector terminal
D5.
(1) Check for continuity between D5 and PCM pin
43.
(2) Use the DRB II Scan Tool to test pin 43.
SECURITY INDICATOR
(1) Jumper cluster connector terminal D16 to
ground. Lamp should light. If OK, test Security
Alarm Module (refer to Group 8Q - Vehicle Theft
Security System). If not, go to step 2.
(2) Measure voltage at cluster connector terminal
D15. Meter should read battery voltage with ignition
OFF. If OK, test Security Alarm Module. If not, re-
place bulb.
FUEL GAUGE
(1) Turn ignition switch to RUN.
(2) Unplug Fuel Gauge sender connector at tank.
Needle should go to E.
(3) Connect a jumper between terminals 1 and 2
(PK/BK and BK/OR wires) on the fuel Gauge Sender
connector. The gauge should move to F. If gauge is
OK, replace sender. If not, go to step 4.
(4) Measure resistance of sender. Meter should
read 105 to 5 ohms. If OK, go to step 5. If not, replace
sender.
(5) Check for an open between sender connector
terminal 1 and cluster connector terminal D6. If OK,
replace gauge. If not, repair open to gauge.
If there
is an open in the line to D6 the Low Fuel will be
illuminated.
SEAT BELT INDICATOR
Jumper instrument cluster connector terminal C14
to 12 volts. Lamp should light. If not, replace bulb. If
OK, check wiring for an open to Convenience Center.
Refer to Group 8U - Chime/Buzzer Warning Systems.
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INSTRUMENT PANEL AND GAUGES
8E - 5
INSTRUMENT CLUSTER SERVICE PROCEDURES
INDEX
page
page
Gauge Replacement—Instrument Cluster
Removed .............................
Instrument Cluster Replacement ...............
Printed Circuit Replacement—Instrument Cluster
Removed .............................
Specifications ..........................
Speedometer Replacement—Instrument Cluster
Removed .............................
Tachometer Replacement—Instrument Cluster
Removed .............................
INSTRUMENT CLUSTER REPLACEMENT
(1) Disconnect negative cable from battery.
(2) Remove ash tray.
(3) Remove 6 screws holding center cluster bezel
Fig. 2 Upper Dash Pad Attaching Screws
Fig. 3 Remove Screws Holding Dash Pad
(10) Open glove box and remove 2 screws holding
dash pad.
(11) Remove dash pad pulling up to unsnap end
clips.
Fig. 1 Remove Center Bezel Retaining Screws
(Fig. 1).
(4) Remove center bezel.
(5) Remove 2 screws holding dash pad.
(6) Gently pry defroster grille out of dash pad.
(7) Unplug sensors (if equipped) and set defroster
grille aside.
(8) Remove 4 screws in defroster duct opening hold-
ing dash pad (Fig. 2).
(9) Remove 3 screws above instrument panel clus-
ter holding dash pad (Fig. 3).
Fig. 4 Instrument Cluster Attaching Screws
(12) Remove 3 screws from the top of the cluster
(Fig. 4).
(13) Lift cluster straight up far enough to allow access to
connector. Unplug connector and remove cluster.
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