Transfer Box
Fault code 2046Gear reduction LED (in control module)
Diagnostic conditions
- Ignition on
- Internal transfer box control module function test
If short circuit to B+:
Engage gear reduction.
If short circuit to ground:
Do not engage gear reduction.
Possible causes of fault
'Gear reduction LED' is activated by transfer box control unit on the ground side.
- 'Short circuit to B+': gear reduction LED does not light
- 'Short circuit to ground': gear reduction LED permanently lit
Affected pins
Transfer box control module plug:
- Pin 4 'gear reduction LED', to gear reduction LED (in running gear control module) 'pin 13'
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. After the test drive, read out the fault memory with the 9588 Porsche System Tester II again. Additional causes of faults that could damage the 'transfer box control unit' should be detected and remedied.
