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6. ENGINE CONTROL MODULE (DIESEL)— INTERNAL SHORT Turn the ignition off. Disconnect the Engine Control Module C2 harness connector. Turn the ignition on. With the scan tool, record and erase FCM DTC’s. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTC’s. Does the scan tool display U0001–CAN C BUS as active? Yes >> Go To 7 No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Engine Control Module in accordance with the service information. Perform the ECM VERIFICATION TEST. 7. STEERING CONTROL MODULE — INTERNAL SHORT Turn the ignition off. Disconnect the Steering Control Module harness connector. Turn the ignition on. With the scan tool, record and erase FCM DTC’s. Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read active FCM DTC’s. Does the scan tool display U1106–CAN C SIGNAL MISSING as active? Yes >> Go To 8 No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace and program the Steer- ing Control Module in accordance with the service information. Perform BODY VERIFICATION TEST – VER 1. (Refer to BODY VERIFICATION TEST – VER 1). 8. (D65) CAN C BUS (+) CIRCUIT SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Turn the ignition on. Measure the voltage between the (D65) CAN C Bus (+) circuit and Is there any voltage present? Yes >> Repair the (D65) CAN C Bus (+) circuit for a short to volt- age. Perform BODY VERIFICATION TEST – VER 1. (Refer to No >> Go To 9 8E - 114 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS LX |