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U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes CAN C BUS CIRCUIT SHORTED CAN C BUS CIRCUIT OPEN ANTI-LOCK BRAKE (ABS) MODULE POWERTRAIN CONTROL MODULE (PCM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Theory of Operation The ABS Module sends vehicle speed information over the CAN C Bus circuit to the PCM. Diagnostic Test 1. ACTIVE DTC NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The With a scan tool, select View DTCs. Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. DTC U0001-CAN C BUS IS ACTIVE IN THE PCM With a scan tool, select View DTCs. Is the DTC U0001-CAN C BUS Active in the PCM? Yes >> Refer to the Diagnostic Procedure for the U0001-CAN C BUS. No >> Go To 3 PM ENGINE ELECTRICAL DIAGNOSTICS - GPEC 9 - 907 |