Testing - Rear Door Fans

Action
1. Check the fan's output signal on pin 38 or 39 on the ACC control module. Manually vary speed using the buttons for fan control.

2. If the output signal is correct, unplug the ACC control module's 39 pin connector and check the resistance in the rear door fan motor windings. Reading should be <80 Ohm. If resistance is correct, refit connectors and restart the system in order to check if the fault is still present.

3. If motor resistance is incorrect, check the cable between the motor connector and the ACC control module's 39 pin connector, and if the resistance is correct, try with a new motor.

4. If the output signal from the fan is incorrect, carefully check the 39 pin connector and then try with a new ACC control module.