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P1001-IGNITION KEY OFF TIMER PERFORMANCE - TOO FAST For a complete wiring diagram Refer to Section 8W Possible Causes BODY CONTROL MODULE BODY CONTROL MODULE POWER AND GROUNDS CHECKING FOR OTHER DTCS CHECKING THE ECT OPERATION IGNITION SWITCH INTERMITTENT CONDITION Diagnostic Test 1. CHECK FOR ACTIVE DTC NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may With the scan tool, erase ECM DTCs. Perform several ignition on key cycles turning the ignition off for 10 seconds between cycles. Turn the ignition on. Monitor the scan tool for ECM DTCs. Did this DTC set again? Yes >> Go To 2 No >> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. CHECKING FOR OTHER DTCS Turn the ignition on. Does the scan tool display all FCM and BCM DTC’s. NOTE: Any ECM communication related DTC’s in the FCM or BCM must be diagnosed and corrected before Are there any ECM communication related DTC’s in the FCM or BCM? Yes >> Refer to the Symptom List and repair communication DTC’s before continuing. Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING). No >> Go To 3 9 - 1210 ENGINE DIESEL DIAG KJ |