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U0155-NO CLUSTER BUS MESSAGE For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes BUS CIRCUIT OPEN OR SHORTED INSTRUMENT CLUSTER PCM Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding (Refer to 9 - ENGINE - 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). Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 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 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diag- nostic procedures and for further possible causes. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 1006 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |