Symptom:
PCI BUS LOOPBACK FAILURE
When Monitored and Set Condition:
PCI BUS LOOPBACK FAILURE
When Monitored: Ignition On - Continuously
Set Condition: When the CAB detects PCI Bus messages have been missing for 5 seconds
and has failed the self test.
POSSIBLE CAUSES
INTERMITTENT DTC
DAMAGED CAB/CAB HARNESS CONNECTOR
FUSED RUN RELAY OUTPUT CIRCUIT OPEN
ABS VALVE FUSED B(+) CIRCUIT OPEN
ABS PUMP FUSED B(+) CIRCUIT OPEN
CAB - GROUND CIRCUIT OPEN
CAB - INTERNAL FAULT
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read DTCs.
With the DRBIIIt, erase DTCs.
Turn the ignition off.
Turn the ignition on.
With the DRBIIIt, read DTCs.
Does the DRBIIIt display PCI BUS LOOPBACK FAILURE?
All
Yes → Go To 2
No → Go To 7
2 Turn the ignition off.
Disconnect the CAB harness connector.
Inspect the CAB/CAB harness connector for damage.
Is there any broken, bent, pushed out, corroded or spread terminals?
All
Yes → Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No → Go To 3
30
BRAKES (CAB)
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