Fault Code 4480

Fault code 4480

Booster pump

Booster pump Carrera 2
The booster pump is located at the front right in the 911 Carrera 2.






Booster pump Carrera 4
The booster pump in the 911 Carrera 4 is located next to the hydraulic unit.






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

Possible cause of fault
- Short circuit to ground/B+ or open circuit
- 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
PSM 5.3 Terminals 22, 24 and 51
PSM 5.7: Terminals 2, 3 and 4

Diagnosis/troubleshooting PSM 5.3









Diagnosis/troubleshooting PSM 5.7