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• When Monitored: • Set Condition: Possible Causes (D72) CAN C DIAGNOSTIC (+) CIRCUIT SHORTED TO VOLTAGE (D71) CAN C DIAGNOSTIC (-) CIRCUIT SHORTED TO VOLTAGE FRONT CONTROL MODULE Diagnostic Test 1. CHECK THE STATUS OF THE ERROR MESSAGE NOTE: Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be dis- NOTE: Ensure the scan tool is updated to the latest software. Disconnect the scan tool from the DLC. Cycle the ignition from on to off 3 times. Turn the ignition on. Does the scan tool display this same error message? Yes >> Go To 2 No >> The conditions that caused this error message to set are not present at this time. Using the wiring dia- gram/schematic as a guide, inspect the wiring and connectors. 2. CAN C DIAGNOSTIC CIRCUITS SHORTED TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Disconnect the scan tool from the DLC. Turn the ignition on. Measure the voltage of the CAN C Diagnostic circuits. Is the voltage above 6.0 volts for either circuit? Yes >> Repair the CAN C Diagnostic circuits for a short to voltage. Perform BODY VERIFICATION TEST – VER 1. (Refer to No >> Inspect the wiring and connectors for damage or shorted circuits. If ok, replace the Front Control Module in accor- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8E - 130 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS LX |