Operation CHARM: Car repair manuals for everyone.

Internal CAB Fault

Tests 48 Through 53:




Test 54:






Symptom
Internal Cab Fault

When Monitored:
1. Ignition turned on for at least 3.4 seconds.
2. ABS power relay closed.
3. Valve command for a particular solenoid not present.

Set Condition:
4. Low feedback voltage from low side of solenoid.
5. Criteria 1-4 satisfied for over 20 consecutive controller checks spaced 5 milliseconds apart.

Possible Causes
- ABS pump fuse defect
- CAB connector observable defect
- CAB defective
- CAB ground circuit open
- FUSED B(+) circuit observable defect
- FUSED B(+) circuit open