B2413

Air recirculation flap motor, short circuit to ground/BPV.

Conditions
B2412: Control module output pin 2 or 21 shorting to ground.
B2413: Control module output pin 2 or 21 shorting to BPV.

Action
1 Unplug the recirculation motor's 2 pin connector. Measure voltage as follows:
Press the button on the Automatic Climate Control (ACC) control module panel in order to activate the recirculation motor Measure the voltage between pin 2 in the connector and ground.
Then press the button again to switch off the air recirculation feature.
Measure the voltage between pin 1 in the connector and ground.
In both cases, the reading should be about 12 volts.
If the values are correct, change the air recirculation motor.
2 Check the wiring harness for open/short circuits as follows:
- Between pin 21 on the ACC control module and pin 1 in the air recirculation motor connector.
- Between pin 2 on the ACC control module and pin 2 in the air recirculation motor connector.
Localize and remedy the open/short circuit.
3 Proceed to "Action Before Changing A Control Module". Before Changing a Control Module