Fault Code 4231

Fault Code 4231

PSM 5.7: Hydraulic unit faulty; PSM 5.3: ABS inlet valve, front right

Diagnostic conditions
- Ignition switched on
- Front right inlet valve voltage actual value is evaluated internally and shows implausible value (valve circuit or driver output malfunction)
- PSM 5.3 Short circuit to ground or open circuit

Possible cause of fault
- PSM hydraulic unit faulty
- PSM 5.3 Wire/plug connection faulty

Affected terminals
PSM 5.7: -
PSM 5.3 26

Diagnosis/troubleshooting PSM 5.7

Work Instruction 1:

Diagnosis/troubleshooting PSM 5.3

Work Instruction 1 - 4: