Differential

U0155-NO CLUSTER BUS MESSAGE

For a complete wiring diagram Refer to Diagrams/Electrical.


- When Monitored:
Ignition key on and battery voltage greater than 10.4 volts.

- Set Condition:
No messages received from the MIC (Instrument Cluster) for more than 20 seconds. One Trip Fault. Three good trips to turn off the MIL.







Refer to the Communications test for this DTC and/or Manufacturer Code Charts for further possible causes.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding Initial Inspection and Diagnostic Overview .


Diagnostic Test


1. ACTIVE DTC
Ignition on, engine not running.
With the scan tool, erase DTCs.
Cycle the ignition key on and off several times.
With the scan tool, read DTCs.
Does the DTC reset?

Yes


- Go To 2


No


- Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). Intermittent Condition
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test



2. COMMUNICATE WITH CLUSTER
With the scan tool, attempt to communicate with the Instrument cluster.
Can communication be established with the Instrument Cluster?

Yes


- Go To 3


No


- Refer to the Communications test for this DTC and/or Manufacturer Code Charts for further possible causes.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test



3. INSTRUMENT CLUSTER OPERATION
Start the engine
Allow the engine to idle.
Is the correct engine speed display in the instrument cluster (Tach)?

Yes


- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test


No


- Perform the appropriate test.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test