Dodge Durango (DN). Manual - part 278

DIAGNOSIS AND TESTING

INSTRUMENT CLUSTER

If all of the gauges and/or indicator lamps are inop-

erative, perform the Preliminary Diagnosis. If an
individual gauge or Chrysler Collision Detection
(CCD) data bus message-controlled indicator lamp is
inoperative, go directly to the Self-Diagnostic Test. If
an individual hard wired indicator lamp is inopera-
tive, refer to Instrument Cluster - Hard Wired
Lamp Diagnosis in the Diagnosis and Testing sec-
tion of this group for the procedures to diagnosis that
lamp. For complete circuit diagrams, refer to Instru-
ment Cluster in the Contents of Group 8W - Wiring
Diagrams.

NOTE: Certain indicator lamps in this instrument
cluster are programmable. This feature allows those
indicator lamps to be activated or deactivated with
a DRBIII

scan tool through the instrument cluster

electronic circuitry for compatibility with certain
optional equipment. If the problem being diagnosed
involves improper illumination of the cruise-on indi-
cator lamp, the overdrive-off indicator lamp, the
transmission oil temperature warning lamp, or the
upshift indicator lamp, use a DRBIII

scan tool to

be certain that the instrument cluster has been pro-
grammed with the proper vehicle equipment option
settings.

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,

REFER

GROUP

PASSIVE

RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING

WHEEL,

STEERING

COLUMN,

INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

PRELIMINARY DIAGNOSIS

(1) If the indicator lamps operate, but none of the

gauges operate, go to Step 2. If all of the gauges and
the CCD data bus message-controlled indicator lamps
are inoperative, go to Step 5.

(2) Check the fused B(+) fuse in the junction block.

If OK, go to Step 3. If not OK, repair the shorted cir-
cuit or component as required and replace the faulty
fuse.

(3) Check for battery voltage at the fused B(+) fuse

in the junction block. If OK, go to Step 4. If not OK,
repair the open fused B(+) circuit to the battery as
required.

(4) Disconnect and isolate the battery negative

cable. Remove the instrument cluster. Connect the

battery negative cable. Check for battery voltage at
the fused B(+) circuit cavity of the instrument cluster
wire harness connector A. If OK, refer to Instru-
ment Cluster - Self-Diagnostic Test in the Diag-
nosis and Testing section of this group. If not OK,
repair the open fused B(+) circuit to the fuse in the
junction block as required.

(5) Check the fused ignition switch output (run/

start) fuse in the junction block. If OK, go to Step 6.
If not OK, repair the shorted circuit or component as
required and replace the faulty fuse.

(6) Turn the ignition switch to the On position and

check for battery voltage at the fused ignition switch
output (run/start) fuse in the junction block. If OK,
go to Step 7. If not OK, repair the open fused ignition
switch output (run/start) circuit to the ignition switch
as required.

(7) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Install the instrument cluster. Connect the battery
negative cable. Turn the ignition switch to the On
position. Set the park brake. The red brake warning
lamp should light. If OK, go to Step 8. If not OK, go
to Step 9.

(8) Turn the ignition switch to the Off position.

Turn on the park lamps and adjust the panel lamps
dimmer thumbwheel on the headlamp switch to the
full bright position. The cluster illumination lamps
should light. If OK, go to Step 10. If not OK, repair
the open power ground circuit from the instrument
cluster wire harness connector A to ground as
required.

(9) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Remove the instrument cluster. Connect the battery
negative cable. Turn the ignition switch to the On
position. Check for battery voltage at the fused igni-
tion switch output (run/start) circuit cavity of the
instrument cluster wire harness connector A. If OK,
refer to Instrument Cluster - Self-Diagnostic Test
in the Diagnosis and Testing section of this group. If
not OK, repair the open fused ignition switch output
(run/start) circuit to the fuse in the junction block as
required.

(10) Disconnect and isolate the battery negative

cable. Remove the instrument cluster. Check for con-
tinuity between the logic ground circuit cavity of the
instrument cluster wire harness connector A and a
good ground. There should be continuity. If OK, refer
to Instrument Cluster - Self-Diagnostic Test in
the Diagnosis and Testing section of this group. If not
OK, repair the open logic ground circuit to ground as
required.

8E - 6

INSTRUMENT PANEL SYSTEMS

SELF-DIAGNOSTIC TEST

The instrument cluster self-diagnostic test will put

the instrument cluster into its self-diagnostic mode.
In this mode the instrument cluster can perform a
self-diagnostic test that will confirm that the instru-
ment cluster circuitry, the gauges, and the CCD data
bus message-controlled indicator lamps are capable
of operating as designed.

However, there may still be a problem with the

CCD data bus, the Powertrain Control Module
(PCM), the Transmission Control Module (TCM), the
Airbag Control Module (ACM), the Controller Anti-
lock Brake (CAB), or the inputs to one of these elec-
tronic control modules. Use a DRBIII

t scan tool and

the proper Diagnostic Procedures manual for testing
of these components.

(1) Begin the test with the ignition switch in the

Off position.

(2) Depress the trip odometer reset button.
(3) While holding the trip odometer reset button

depressed, turn the ignition switch to the On posi-
tion, but do not start the engine.

(4) Keep the trip odometer reset button depressed

for about ten seconds, until CHEC appears in the
odometer display, then release the odometer reset
button.

(5) A series of three-digit numeric failure messages

may appear in the odometer display, depending upon
the failure mode. If a failure message appears, see
the Instrument Cluster Failure Message chart for the
description and proper correction. If no failure mes-
sage appears, the self-diagnostic test will proceed as
described in Step 6.

INSTRUMENT CLUSTER FAILURE MESSAGE

Message

Description

Correction

110

A failure has been identified in the cluster
CPU, RAM, or EEPROM.

1. Replace the faulty cluster.

900

The CCD data bus is not operational.

1. Check the CCD data bus connections at the
cluster.
2. Check the cluster fuses.
3. Check the CCD data bus bias.
4. Check the CCD data bus voltage.
5. Check the CCD data bus terminations.

920

The cluster is not receiving a vehicle speed
message from the PCM.

1. Check the PCM software level and reflash if
required.
2. Use a DRBIII

scan tool to verify that the

vehicle speed message is being sent by the
PCM.

921

The cluster is not receiving a distance pulse
message from the PCM.

1. Check the PCM software level and reflash if
required.
2. Use a DRBIII

scan tool to verify that the

distance pulse message is being sent by the
PCM.

940

The cluster is not receiving an airbag lamp-on
message from the ACM.

1. Check the CCD data bus connections at the
ACM.
2. Check the ACM fuse.

950

The cluster is not receiving an ABS lamp-on
message from the CAB.

1. Check the CCD data bus connections at the
CAB.
2. Check the CAB fuse.

960

The cluster is not receiving a PRND21
message from the TCM.

1. Check the CCD data bus connections at the
TCM.
2. Check the TCM fuse.

999

An error has been discovered.

1. Record the failure message.
2. Depress the trip odometer reset button to
continue the Self-Diagnostic Test.

INSTRUMENT PANEL SYSTEMS

8E - 7

DIAGNOSIS AND TESTING (Continued)

(6) The instrument cluster will begin the odometer

walking segment test. This test will require the oper-
ator to visually inspect each odometer segment as it
is displayed to determine a pass or fail condition.
First, all of the segments will be illuminated at once;
then, each individual segment of the odometer dis-
play will be illuminated in sequence. If any segment
in the display fails to illuminate, repeat the test to
confirm the failure. If the failure is confirmed,
replace the faulty instrument cluster. Following the
odometer walking segment test, the self-diagnostic
test will automatically proceed as described in Step
7.

(7) The instrument cluster will perform a bulb

check of each indicator lamp that the instrument
cluster circuitry controls. If an individual amber indi-
cator lamp does not illuminate during this test, the
instrument cluster should be removed. However,
check that the incandescent lamp bulb is not faulty
and that the bulb holder is properly installed on the
instrument cluster electronic circuit board before con-
sidering instrument cluster replacement. If the bulb
and bulb holder check OK, replace the faulty instru-
ment cluster. Each of the red indicators are illumi-
nated by a Light Emitting Diode (LED). If an LED
fails to illuminate during this test, the instrument
cluster must be replaced. Following the bulb check
test, the self-diagnostic test will automatically pro-
ceed as described in Step 8.

(8) The instrument cluster will perform a gauge

actuator test. In this test the instrument cluster cir-
cuitry positions each of the gauge needles at three
different calibration points, then returns the gauge
needles to their relaxed positions. If an individual
gauge does not respond properly, or does not respond
at all during the gauge actuator test, the instrument
cluster should be removed. However, check that the
gauge terminal pins are properly inserted through
the spring-clip terminal pin receptacles on the instru-
ment cluster electronic circuit board before consider-
ing instrument cluster replacement. If the gauge
terminal connections are OK, replace the faulty
instrument cluster.

(9) The self-diagnostic test is now completed. The

instrument cluster will automatically exit the self-di-
agnostic mode and return to normal operation at the
completion of the test, if the ignition switch is turned
to the Off position during the test, or if a vehicle
speed message indicating that the vehicle is moving
is received from the PCM on the CCD data bus dur-
ing the test.

(10) Go back to Step 1 to repeat the test, if

required.

HARD WIRED LAMP DIAGNOSIS

Each of the lamps found in this section depends

upon a hard wired circuit input to the instrument
cluster for proper operation. The following procedures
will help to diagnose conditions that may cause an
inoperative hard wired lamp circuit condition.

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,

REFER

GROUP

PASSIVE

RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING

WHEEL,

STEERING

COLUMN,

INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

BRAKE WARNING LAMP

The diagnosis found here addresses an inoperative

brake warning lamp condition. If the brake warning
lamp stays on with the ignition switch in the On
position and the park brake released, or comes on
while driving, refer to Rear Wheel Antilock for
vehicles equipped with a rear wheel anti-lock brake
system, or refer to Antilock Brakes for vehicles
equipped with a four wheel anti-lock brake system in
the Diagnosis and Testing section of Group 5 -
Brakes for further diagnosis. If no brake system
problem is found, the following procedure will help
locate a faulty park brake switch or park brake
switch sense circuit. For complete circuit diagrams,
refer to Instrument Cluster in the Contents of
Group 8W - Wiring Diagrams.

(1) Check the fused ignition switch output (run/

start) fuse in the junction block. If OK, go to Step 2.
If not OK, repair the shorted circuit or component as
required and replace the faulty fuse.

(2) Turn the ignition switch to the On position.

Check for battery voltage at the fused ignition switch
output (run/start) fuse in the junction block. If OK,
go to Step 3. If not OK, repair the open fused ignition
switch output (run/start) circuit to the ignition switch
as required.

(3) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Disconnect the wire harness connector at the park
brake switch. With the park brake released, check for
continuity between the park brake switch terminal
and a good ground. There should be no continuity. If
OK, go to Step 4. If not OK, adjust or replace the
faulty park brake switch.

(4) Remove the instrument cluster. With the park

brake switch wire harness connector still discon-
nected, check for continuity between the park brake
switch sense circuit cavity of the park brake switch
wire harness connector and a good ground. There

8E - 8

INSTRUMENT PANEL SYSTEMS

DIAGNOSIS AND TESTING (Continued)

should be no continuity. If OK, go to Step 5. If not
OK, repair the shorted park brake switch sense cir-
cuit as required.

(5) Check for continuity between the park brake

switch sense circuit cavities of the instrument cluster
wire harness connector A and the park brake switch
wire harness connector. There should be continuity. If
OK, refer to Instrument Cluster - Preliminary
Diagnosis in the Diagnosis and Testing section of
this group for further testing of the brake warning
lamp and the instrument cluster circuitry. If not OK,
repair the open park brake switch sense circuit as
required.

CLUSTER ILLUMINATION LAMP

The diagnosis found here addresses an inoperative

instrument cluster illumination lamp condition. If
the problem being diagnosed includes inoperative
exterior lighting controlled by the headlamp switch,
that system needs to be repaired first. If the exterior
lamps controlled by the headlamp switch are inoper-
ative, refer to Headlamp Diagnosis in the Diagno-
sis and Testing section of Group 8L - Lamps for
diagnosis. If no exterior lighting system problems are
found, the following procedure will help locate a
short or open in the cluster illumination lamp circuit.
If the problem being diagnosed involves a lack of
dimming control for the odometer/trip odometer Vac-
uum Fluorescent Display (VFD), but all of the other
cluster illumination lamps can be dimmed, repair the
open headlamp switch output circuit input to the
instrument cluster. For complete circuit diagrams,
refer to Instrument Cluster in the Contents of
Group 8W - Wiring Diagrams.

(1) Check the panel lamps dimmer fuse in the

junction block. If OK, go to Step 2. If not OK, repair
the shorted circuit or component as required and
replace the faulty fuse.

(2) Turn the park lamps on with the headlamp

switch. Rotate the panel lamps dimmer thumbwheel
on the headlamp switch upward to just before the
interior lamps detent. Check for battery voltage at
the panel lamps dimmer fuse in the junction block.
Rotate the panel lamps dimmer thumbwheel down-
ward while observing the test voltmeter. The reading
should go from battery voltage to zero volts. If OK,
go to Step 3. If not OK, repair the open panel lamps
dimmer switch signal circuit to the headlamp switch
as required. If the circuit tests OK, refer to Head-
lamp Diagnosis in the Diagnosis and Testing sec-
tion of Group 8L - Lamps to diagnose the headlamp
switch.

(3) Disconnect and isolate the battery negative

cable. Remove the instrument cluster. Turn the head-
lamp switch off. Remove the panel lamps dimmer
fuse from the junction block. Probe the fused panel

lamps dimmer switch signal circuit cavity of the
instrument cluster wire harness connector B. Check
for continuity to a good ground. There should be no
continuity. If OK, go to Step 4. If not OK, repair the
shorted fused panel lamps dimmer switch signal cir-
cuit as required.

(4) Install the panel lamps dimmer fuse in the

junction block. Connect the battery negative cable.
Turn the park lamps on with the headlamp switch.
Rotate the panel lamps dimmer thumbwheel on the
headlamp switch upward to just before the interior
lamps detent. Check for battery voltage at the fused
panel lamps dimmer switch signal circuit cavity of
the instrument cluster wire harness connector B. If
OK, replace the faulty cluster illumination lamp
bulb(s) and bulb holder(s). If not OK, repair the open
fused panel lamps dimmer switch signal circuit as
required.

FOUR-WHEEL DRIVE LOCK INDICATOR LAMP

The diagnosis found here addresses an inoperative

four-wheel drive indicator lamp condition. If the
problem being diagnosed is related to lamp accuracy,
be certain to confirm that the problem is with the
lamp or switch and not with a damaged or inopera-
tive transfer case or transfer case linkage. Refer to
NV231 Diagnosis or NV242 Diagnosis in the Diag-
nosis and Testing section of Group 21 - Transmission
for more information. If no transfer case problem is
found, the following procedure will help locate a
short or open in the indicator lamp circuit. For com-
plete circuit diagrams, refer to Instrument Cluster
in the Contents of Group 8W - Wiring Diagrams.

(1) Check the fused ignition switch output (run/

start) fuse in the junction block. If OK, go to Step 2.
If not OK, repair the shorted circuit or component as
required and replace the faulty fuse.

(2) Turn the ignition switch to the On position.

(3) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Disconnect the transfer case switch wire harness con-
nector. Check for continuity between the ground cir-
cuit cavity of the transfer case switch wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 4. If not OK, repair the open
ground circuit to ground as required.

(4) Connect the battery negative cable. Turn the

ignition switch to the On position. Install a jumper
wire between the four wheel drive lock indicator
lamp driver circuit cavity of the transfer case switch
wire harness connector and a good ground. The four-

INSTRUMENT PANEL SYSTEMS

8E - 9

DIAGNOSIS AND TESTING (Continued)

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