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U0100-LOST COMMUNICATION WITH ECM/PCM (CONTINUED) 3. VERIFY THAT THE ECM/PCM IS ACTIVE ON THE BUS Turn the ignition on. With the scan tool, select Network Diagnostics. Verify that the ECM/PCM is active on the bus. Is the ECM/PCM active on the bus? Yes >> Go To 4 No >> Refer to the Table of Contents located in this section for a no response test procedure. Perform BODY VERIFICATION TEST – VER 1. 4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS With the scan tool, select Network Diagnostics. Is there more than one module with active DTCs “Logged Against” the ECM/PCM? Yes >> Replace/update the ECM/PCM in accordance with the service information. Perform BODY VERIFICATION TEST – VER 1. No >> Replace/update the module that set this DTC in accordance with the service information. Perform BODY VERIFICATION TEST – VER 1. 5 - 374 BRAKES - BRAKE CONTROLLER ELECTRICAL DIAGNOSTICS WK |