Fault Code 4480

Fault Code 4480

Booster pump

Diagnostic conditions
- Booster pump actual value is evaluated and displays an implausible value

Possible cause of fault
- Short circuit to ground/voltage or open circuit in circuit to control module terminals 2, 3 and 4
- Booster pump motor locked up/faulty
- Wiring/ plug connection faulty

NOTE: Do not jumper the pump; it must not run dry under any circumstances:

Affected terminals
Terminals 2, 3 and 4

Diagnosis/troubleshooting

Diagnosis/troubleshooting (Part 1):

Diagnosis/troubleshooting (Part 2):