Differential

U0155-NO CLUSTER BUS MESSAGE

For a complete wiring diagram refer to Diagrams/Electrical. Electrical Diagrams


- 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 Communications for diagnostic procedures and 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. Verification Tests



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 Communications for diagnostic procedures and for further possible causes.
- Perform the POWERTRAIN VERIFICATION TEST. Verification Tests



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. Verification Tests

No

- Refer to the Instrument Category and perform the appropriate symptom.
- Perform the POWERTRAIN VERIFICATION TEST. Verification Tests