Signal implausible

1. Check outside air / recirculation valve for smooth operation.

2. Pull off connectors A, B, C and D on the heating/air cond. control.

3. Pull off connector on the outside air / recirculation valve drive motor.

4. Connect ohmmeter to connector D 13 and drive motor connector pin 1.

Connect ohmmeter to connector D 5 and drive motor connector Connect ohmmeter to connector B 17 and drive motor connector Connect ohmmeter to connector C 8 and drive motor connector Connect ohmmeter to connector A 12 and drive motor connector

5. Check wire from connector D 13 to drive motor pin 1 for short to B+ and short to ground.

6. Check wire from connector D 5 to drive motor pin 2 for short to plus

Test point 10

Motor, outside air / recirculation valve

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