Front Air Mix Control Motor Test
Front Air Mix Control Motor Test1. Disconnect the 7P connector from the front air mix control motor.
NOTICE: Incorrectly applying power and ground to the front air mix control motor will damage it. Follow the instructions carefully.
2. Connect battery power to the No. 1 terminal of the front air mix control motor, and ground the No. 2 terminal; the front air mix control motor should run, and stop at Max Cool. If it doesn't, reverse the connections; the front air mix control motor should run, and stop at Max Hot.
3. If the front air mix control motor does not run in step 2, remove it, then check the front air mix control linkage and door for smooth movement.
- If the linkage and door move smoothly, replace the front air mix control motor.
- If the linkage or door sticks or binds, repair them as needed.
- If the front air mix control motor runs smoothly, go to step 4.
4. Measure the resistance between the No. 5 and No. 7 terminals. It should be between 4.2 to 7.8 kohms.
5. Reconnect the front air mix control motor 7P connector, then turn the ignition switch ON (II).
6. Using the backprobe set, measure the voltage between the No. 3 and No. 5 terminals.
Max Cool: About 0.7 V
Max Hot: About 4.2 V
7. If either the resistance or voltage readings are not as specified, replace the front air mix control motor.