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U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM For a complete wiring diagram Refer to Section 8W • When Monitored: • Set Condition: Possible Causes INTERMITTENT DTC CAN BUS OPEN OR SHORTED CONDITION TRANSMISSION CONTROL MODULE (TCM) ENGINE CONTROL MODULE (ECM) Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC NOTE: Diagnose all CAN B and C communication DTCs before continuing. With a scan tool, view DTCs. Is the status Active for this DTC? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 2. COMMUNICATION DTCS PRESENT IN THE TRANSMISSION CONTROL MODULE (TCM) With a scan tool check for DTCs in the Transmission Control Module (TCM). Are there any CAN bus DTCs active in the Transmission Control Module (TCM) at this time? Yes >> Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for addi- tional vehicle communication diagnostic procedures. Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL No >> Replace and program the Engine Control Module (ECM) in accordance with the Service Information. Perform the ECM Verification Test Ver. 1. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) 9 - 1844 ENGINE ELECTRICAL DIAGNOSTICS - DIESEL LX |