Driver's Air Mix Control Motor Test

NOTE: Before testing, check for HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).

Disconnect the 5P connector from the driver's air mix control motor.
NOTE: Incorrectly applying power and ground to the driver's air mix control motor will damage it. Follow the instructions carefully.
Connect battery power to the No. 1 terminal of the driver's air mix control motor, and ground the No. 2 terminal; the driver's air mix control motor should run, and stop at Max Hot. If it doesn't, reverse the connections; the driver's air mix control motor should run, and stop at Max Cool. When the driver's air mix control motor stops running, disconnect the battery power immediately.
If the driver's air mix control motor did not run in step 2, remove it, then check the driver's air mix control linkage and door for smooth movement.
- If the linkage and the door move smoothly, replace the driver's air mix control motor.
- If the linkage or the door sticks or binds, repair them as needed.
- If the driver's air mix control motor runs smoothly, go to step 4.
Fig 1: Driver's Air Mix Control Motor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the resistance between the No. 4 and No. 5 terminals. It should be between 4.2 to 7.8 k Ω.
Reconnect the driver's air mix control motor 5P connector, then turn the ignition switch ON (II).
Using the backprobe set, measure the voltage between the No. 3 and No. 5 terminals.
Max Cool-about 1.0 V

Max Hot-about 4.0 V
If either the resistance or voltage readings are not as specified, replace the driver's air mix control motor.