Transfer Box

Fault code 0532

Voltage supply

Diagnostic conditions
- Ignition on
- Internal transfer box control module function test

Possible causes of fault
- 'Below lower limit', battery discharged or faulty
- 'Lower limit value not reached', fuse faulty
- 'Below lower limit', line short circuit to ground or open circuit
- 'Below lower limit', alternator faulty
- 'Below lower limit', transfer box control unit faulty
- 'Above upper limit', alternator faulty
- 'Above upper limit', transfer box control unit faulty

Affected pins
Transfer box control module plug:
- Pin 46 'terminal 30', from fuse carrier at right of dashboard 'fuse 57'
- Pin 47 'ground', from ground pin 'MB26'

Diagnosis/troubleshooting

NOTE:
Visual inspection: In the next troubleshooting section, please check first that the affected 'pin' of the transfer box control unit plug connection and the 'pin' of the plug connections 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.

Before carrying out the work instruction, check fuse '57', voltage supply terminal 30 for the transfer box control unit, in the fuse carrier to the right of the dashboard and replace if necessary. After replacing the fuse, determine and remedy the cause of the fault in accordance with the work instruction below.