Fault code 1038: Diagnosis/troubleshooting

NOTE: Visual inspection: In the next troubleshooting section, please check first that the affected pins on the rear convenience system control unit plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and proper contact. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.

NOTE: Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.

NOTE: Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and provided, if necessary. On the vehicle electrical system, the voltage to the fuse (input side) must be guaranteed.

NOTE:

Thermal-protection deactivation is a calculated value. This is calculated on the basis of the operating time and load.
The status of the counter can be monitored using the Porsche System Tester 2 No. 9588 in the menu 'Actual values/Thermal protection for power windows'.

WORK INSTRUCTION CHART

Work instruction			Display OK	If not OK
1	Check thermal protection	Wait at least 30 seconds (without locking/unlocking or securing the doors)	Status of the fault changes to sporadic Go to step 2	Go to step 3
2	The vehicle was locked/unlocked or secured too often		→ End
3	Replace rear convenience system control unit		→ End