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




Work instructions 1 and 2




Work instructions 3 to 7