Dodge Ram. Manual — part 111
Symptom:
*ALL GAUGES INOPERATIVE
POSSIBLE CAUSES
NO RESPONSE - PCI BUS
PCI BUS - POWERTRAIN CONTROL MODULE
PCI BUS - INSTRUMENT CLUSTER
FUSED IGNITION SWITCH OUTPUT CIRCUIT (UNLOCK/RUN) SHORT TO GROUND
INSTRUMENT CLUSTER GROUND CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT SHORT TO GROUND
FUSED IGNITION SWITCH OUTPUT (UNLOCK/RUN) CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
NOTE: Diagnose and repair any MIC, PCM (ECM if diesel equipped), or
Communication DTCs before proceeding with this test.
Turn the ignition on.
With the DRBIII
t, select System Monitors, then J1850 Module Scan.
Does the DRBIII
t display MIC PRESENT on the BUS?
All
Yes
→ Go To 2
No
→ Refer to the COMMUNICATION category and perform the appro-
priate symptom.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, select Body, MIC, SYSTEM TESTS, PCM Monitor.
Does the DRBIII
t display PCM INACTIVE on the BUS?
All
Yes
→ Refer to the COMMUNICATION category and perform the ap-
propriate symptom.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, select Body, MIC, MODULE DISPLAY.
Does the DRBIII
t display NO RESPONSE from MIC?
All
Yes
→ Refer to the COMMUNICATION category and perform the ap-
propriate symptom.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
441
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Inspect the #20 Fuse in the PDC.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
Inspect the #20 Fuse in the PDC.
Is the fuse open?
All
Yes
→ Repair the Fused Ignition Switch Output (Unlock/Run) circuit for
a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off.
Remove and inspect the #29 Fuse in the PDC.
If the fuse is open, replace with the proper rated fuse.
Turn the ignition on for 1 minute.
Turn the ignition off.
Remove and inspect the #29 Fuse in the PDC.
Is the fuse open?
All
Yes
→ Repair the Fused Ignition Switch Output (Run/Start) circuit for a
short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Turn the ignition on.
Measure the voltage between the Fused Ignition Switch Output (Unlock/Run) circuit
and ground.
Is the voltage below 10.5 volts?
All
Yes
→ Repair the Fused Ignition Switch Output (Unlock/Run) circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 7
7
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Turn the ignition on.
Measure the voltage between the Fused Ignition Switch Output (Run/Start) circuit
and ground.
Is the voltage below 10.5 volts?
All
Yes
→ Repair the Fused Ignition Switch Output (Run/Start) circuit for
an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 8
442
INSTRUMENT CLUSTER
*ALL GAUGES INOPERATIVE —
Continued
TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance between ground and the Instrument Cluster Ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace and configure the Instrument Cluster in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Instrument Cluster Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
443
INSTRUMENT CLUSTER
*ALL GAUGES INOPERATIVE —
Continued
Symptom:
*ANY PCI INDICATOR INOPERATIVE
POSSIBLE CAUSES
INDICATOR MESSAGE NOT RECEIVED
NO RESPONSE - INSTRUMENT CLUSTER
NO RESPONSE - PCI BUS
NO RESPONSE - PCI BUS - POWERTRAIN CONTROL MODULE
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, select System Monitors, then J1850 Module Scan.
Does the DRBIII
t display MIC PRESENT on the BUS?
All
Yes
→ Go To 2
No
→ Refer to the COMMUNICATION category and perform the appro-
priate symptom.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, select MIC, then MODULE DISPLAY.
Does the DRBIII
t display NO RESPONSE from MIC?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE INSTRUMENT CLUSTER.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, select Body, MIC, MONITORS, PCI BUS MONITORS.
Does the DRBIII
t display PCM INACTIVE on the BUS?
All
Yes
→ Refer to the symptom list for problems related to *NO RE-
SPONSE FROM THE POWERTRAIN CONTROL MODULE.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
NOTE: Diagnose and repair any PCM or BCM DTCs before proceeding with
this test.
Perform the Instrument Cluster Self Test.
Depress and hold the Trip Odometer button while turning the ignition from the off to
the on position.
Observe the indicator in question.
Did the indicator illuminate?
All
Yes
→ Refer to the appropriate Service Information category to diagnose
the related system.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace and configure the Instrument Cluster in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
444
INSTRUMENT CLUSTER
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