Diagnosis/troubleshooting
Work Instruction 1
NOTE: Erase the fault memory before troubleshooting and perform a test drive.
Fault Code 4802
Fault Code 4802
Undervoltage
Internal control unit function test
NOTE: Once the vehicle voltage is within the permissible voltage range again, the PSM system is switched back on and the indicator lights go out.
Diagnostic conditions
- Vehicle speed is greater than 6 km/h
Possible cause of fault
- Vehicle voltage less than 9.4 V or greater than 17.4 V (control unit voltage supply, rate-of-turn sensor and steering angle sensor)
- Faulty connection to PSM control unit
- PSM control unit faulty
Affected pins
Pin 1, pin 5, pin 2, pin 6 and pin 23
Diagnosis/troubleshooting