PCI Bus Loopback

Symptom:
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.

Test 1-3:

Test 4-6:

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