Mode Control Actuator

INSPECTION
1. Ignition "OFF"
2. Disconnect the connector of mode control actuator.
3. Verify that the mode control actuator operates to the defrost mode when connecting 12 V to the terminal 3 and grounding terminal 4.




4. Verify that the mode control actuator operates to the vent mode when connecting in the reverse.




5. Check the voltage between terminals 3 and 4.
6. If the measured voltage is not specification, substitute with a known-good mode control actuator and check for proper operation.
7. If the problem is corrected, replace the mode control actuator.