System Pre Check

Connector:

DESCRIPTION
Code 4 is generated by the module's detection of a resistance falling below 18K ohms (short) or above 26K ohms (open) in Circuit 535 (LB/R). This can indicate an open or short in the reset switch circuit, or a hydraulic leak into dump section of the valve.

Possible Contributing Base Brake Component/Vehicle Wiring Concerns
- Terminal backout in the module harness connector at Pin 6
- Terminal backout in the RABS valve harness connector at Pins 2 or 3
- Bulkhead connector (between engine compartment and instrument panel) terminal backout or loose connection
- Module or RABS valve connectors not fully mated with component
- Intermittent open or open circuit in Circuits 535 (LB/R), or 274 (BK/W)
- Intermittent short or short circuit in Circuit 535 (LB/R)
- Defective anti-lock brake control module