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U0025-CAN B BUS (-) CIRCUIT LOW (CONTINUED) For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes (D54) CAN B BUS (-) CIRCUIT SHORTED TO GROUND OR TO (D54) CAN B BUS (-) CIRCUIT 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 GROUND Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Measure the resistance between ground and the (D54) CAN B Bus (-) Is resistance below 1000.0 ohms? Yes >> Go To 3 No >> Go To 4 8E - 54 ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS WK |