Fault Code 4266

Fault Code 4266

Return pump fault

Diagnostic conditions
- Return pump voltage and motor relay voltage actual values are evaluated and display implausible values
- Open circuit in circuit to control module terminal 1

Possible cause of fault
- Return pump motor locked up/runs too easily
- Wire/ plug connection faulty
- PSM hydraulic unit faulty

Affected terminals
Terminal 1

Diagnosis/troubleshooting

Diagnosis/troubleshooting: