A3 Quattro V6-3.2L (BUB) (2008)
‹› By pressing fresh/recirculating air button - F -, Heater Control Module (J65) changes the voltage supply to Fresh/Recirculating Air Door Motor
(V154) (B+ and GND are interchanged).
‹› Depending on the version of the Heater Control Module (J65), Plus is applied continuously or only for a certain period of time after pressing the
fresh/recirculating air button. If this time has elapsed, the motor is only still actuated over a certain duty cycle for control modules on which the
Plus is applied only for a certain period of time (lamp in Voltage Tester (V.A.G 1527 B) only still blinks on briefly).
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"Ground (GND)" is applied at terminal "10" continuously or for a short time and "Plus" is applied at terminal " 9" continuously or for a short time.
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Fresh/Recirculating Air Door Motor (V154) and thus the fresh/recirculating air door moves into "fresh air mode" position (recirculating air intake
opening - C - is closed).
‹› In vehicles with right-hand steering, connections on motor are interchanged with each other. Wiring diagrams, Troubleshooting & Component
locations.
If no malfunction is detected during this test:
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Check fresh/recirculating air door for freedom of movement.
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Replace the Fresh/Recirculating Air Door Motor ( V154). Refer to=> [ Fresh/Recirculating Air Door Motor ] See: Air Door/Air Door Actuator /
Motor/Service and Repair/Fresh/Recirculating Air Door Motor.
Not OK?
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Check the wire connection between the Heater Control Module (J65) and the fresh/recirculating air door motor (V154) for an open circuit or a
short circuit.
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Check the voltage supply and the ground connection on the Heater Control Module (J65).