Jeep Wrangler TJ. Manual — part 35
Symptom:
PCM MESSAGE NOT REC’D BY MIC
When Monitored and Set Condition:
PCM MESSAGE NOT REC’D BY MIC
When Monitored:
With the ignition in the Run/Start position, Instrument Cluster in
power-up state.
Set Condition:
The Instrument Cluster detects loss of communication with Powertrain
Control Module (PCM). .
POSSIBLE CAUSES
PCM MESSAGE NOT REC’D BY MIC
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure the Instrument Cluster communicates on the PCI Bus.
With the DRBIII
t, select Body, Electro/Mech Cluster, then read DTCs.
Does the DRBIII
t display NO RESPONSE FROM PCM (PCI)?
All
Yes
→ Refer to the COMMUNICATION category and perform the ap-
propriate symptom.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
137
INSTRUMENT CLUSTER
Symptom:
SKIM MESSAGE NOT REC’D BY MIC
When Monitored and Set Condition:
SKIM MESSAGE NOT REC’D BY MIC
When Monitored:
With the ignition in the Run/Start position, Instrument Cluster in
power-up state.
Set Condition:
The Instrument Cluster detects loss of communication with the Sentry
Key Immobilizer Module (SKIM). .
POSSIBLE CAUSES
SKIM MESSAGE NOT RECEIVED
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure the Instrument Cluster communicates on the PCI Bus.
With the DRBIII
t, select Body, Electro/Mech Cluster, then read DTCs.
Does the DRBIII
t display SKIM Message Not Rec’d by MIC?
All
Yes
→ Refer to the COMMUNICATION category and perform the ap-
propriate symptom.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
138
INSTRUMENT CLUSTER
Symptom:
*
(NO BUS( IN VF DISPLAY
POSSIBLE CAUSES
PCI BUS MESSAGES NOT REC’D BY MIC
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, select J1850 Module Scan.
Does the DRBIII
t display MIC in the J1850 Module Scan?
All
Yes
→ Replace the Instrument Cluster in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to the COMMUNICATION category and perform the appro-
priate symptom.
Perform BODY VERIFICATION TEST - VER 1.
139
INSTRUMENT CLUSTER
Symptom:
*
(NO FUSE( IN VF DISPLAY
POSSIBLE CAUSES
FUSED B(+) CIRCUIT SHORT TO GROUND
FUSED B(+) CIRCUIT OPEN
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Inspect the #24 fuse in the Power Distribution Center.
If the fuse is open, replace with proper rated fuse.
Turn the ignition on for one minute.
Turn the ignition off.
Inspect the #24 fuse in the Power Distribution Center.
Is the fuse open?
All
Yes
→ Repair the Fused B(+) circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Check connectors - Clean/repair as necessary.
Measure the voltage between the Fused B(+) circuit and ground.
Is the voltage above 10.5 volts?
All
Yes
→ Replace and configure the Instrument Cluster in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
140
INSTRUMENT CLUSTER
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