Transfer Box
Fault code 2042Activation of transfer box servo motor
Diagnostic conditions
- Ignition on
- Internal transfer box control unit function test
- Engine running
- Selector lever position 'P'
- Engage longitudinal lock/gear reduction
Possible causes of fault
- 'Open circuit': open circuit between leads (servo motor does not function)
- 'Open circuit': control unit faulty (servo motor does not function)
- 'Open circuit': open circuit in servo motor winding (servo motor does not function)
Affected pins
Transfer box control unit plug:
- Pin 15 'servo motor (A)', to pin Al of 'servo motor plug A'
- Pin 16 'servo motor (B)', to pin A4 of 'servo motor plug B'
Diagnosis/troubleshooting
NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' of the transfer box control unit plug connection and the 'pins' of the plug connections on the servo motor are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.
NOTE:Control unit replacement: Before replacing the 'transfer box control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'transfer box control unit' should be detected and remedied.
