|
|
Symptom: PCI BUS LOOPBACK When Monitored and Set Condition: PCI BUS LOOPBACK When Monitored: Ignition On - Continuously Set Condition: When the ABM detects PCI Bus messages have been missing for 5 seconds and has failed the self test. POSSIBLE CAUSES INTERMITTENT DTC DAMAGED ABM/ABM HARNESS CONNECTOR FUSED RUN RELAY OUTPUT CIRCUIT OPEN ABS VALVE FUSED B(+) CIRCUIT OPEN ABM - GROUND CIRCUIT OPEN ABM - INTERNAL FAULT TEST ACTION APPLICABILITY 1 Turn the ignition on. t, read DTCs. With the DRBIII t, erase DTCs. Turn the ignition off. t, read DTCs. Does the DRBIII t display PCI BUS LOOPBACK? All Yes → Go To 2 No → Go To 6 2 Turn the ignition off. All Yes → Repair as necessary. Perform ABS VERIFICATION TEST - VER 1. No → Go To 3 3 Turn the ignition off. All Yes → Go To 4 No → Repair the Fused Run Relay Output circuit for an open. Perform ABS VERIFICATION TEST - VER 1. 61 BRAKES (25E) |