Rear Mode Control Motor Test

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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

Disconnect the 7P connector from the rear mode control motor.
NOTE: Incorrectly applying power and ground to the rear mode control motor will damage it. Follow the instructions carefully.
Connect battery power to terminal No. 1 of the rear mode control motor, and ground terminals No. 5 and No. 7; the rear mode control motor should run smoothly. To avoid damaging the rear mode control motor, do not reverse power and ground. Disconnect terminals No. 5 or No. 7 from ground; the rear mode control motor should stop at Vent (when the terminal No. 5 is disconnected) or Heat (when the terminal No. 7 is disconnected). Don't cycle the rear mode control motor for a long time.

Fig 1: Identifying Rear Mode Control Motor Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the rear mode control motor did not run in step 2, remove it, then check the rear mode control linkage and door for smooth movement.
- If the linkage and door move smoothly, replace the rear mode control motor (see REAR MODE CONTROL MOTOR REPLACEMENT ).
- If the linkage or door stick or bind, repair them as needed.