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U0026-CAN B BUS (-) CIRCUIT HIGH (CONTINUED) For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (D54) CAN B BUS (-) CIRCUIT SHORTED TO VOLTAGE ANY CAN B BUS MODULE FRONT CONTROL MODULE Diagnostic Test 1. TEST FOR INTERMITTENT CONDITION 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 this DTC as active? Yes >> Go To 2 No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche- matic as a guide, inspect the wiring and connectors. 2. CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR A SHORT TO VOLTAGE Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Turn the ignition on. Measure the voltage between the (D54) CAN B Bus (-) circuit and Is voltage above 10.0 volts? Yes >> Go To 3 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 8 8E - 58 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS WK |