Fault Code 4460

Fault Code 4460

Pressure sensor

Diagnostic conditions
- Pressure sensor actual value is evaluated and displays an implausible value

Possible cause of fault
- Short circuit to ground/B+ or open circuit
- Plug connection on stop light switch faulty
- Incorrect adjustment of the stop light switch
- Wiring/plug connection between pressure sensor and control module faulty
- Pressure sensor faulty

NOTE: A malfunction of the stop light switch can cause this fault The stop light switch must have switched before a brake pressure is recognised. When the brake pedal is actuated, the stop fight switch and the brake lights are triggered. The brake pressure on the pressure sensor is 0 bar.

Affected terminals
PSM 5.3: Terminals 67, 68 and 69
PSM 5.7: Terminals 25, 26 and 42

Diagnosis/troubleshooting PSM 5.3
Pressure sensor PSM 5.3







The pressure sensor is located on the booster pump on the PSM 5.3.

Work Instruction 1 - 5:

Work Instruction 6 - 8:

Diagnosis/troubleshooting PSM 5.7
Pressure sensor PSM 5.7







The pressure sensor is on the hydraulic unit on the PSM 5.7.

Work Instruction 1 - 2:

Work Instruction 3 - 6:

Work Instruction 7 - 8: