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Mode Control Motor Test

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the 7P connector from the mode control motor.
    NOTE: Incorrectly applying power and ground to the mode control motor will damage it. Follow the instructions carefully.
  2. Connect battery power to the No. 2 terminal of the mode control motor, and ground the No. 1 terminal; the mode control motor should run smoothly. Vent side. If it doesn't, reverse the connections; the mode control motor should run smoothly, Defrost side. When the mode control motor stops running, disconnect battery power immediately.
    Fig 1: Mode Control Motors
    G05492678Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. If the mode control motor did not run in step  2, remove it, then check the mode control linkage and doors for smooth movement.
    • If the linkage and doors move smoothly, replace the mode control motor.
    • If the linkage or doors stick or bind, repair them as needed.
    • If the mode control runs smoothly, go to step 4.
  4. Use a digital multimeter with an output of 1 mA or less at the 20 kΩ range. With the mode control motor running as in step  2, check for continuity between the No. 3,4,5, and 6 terminals and the No. 7 terminal individually. There should be continuity for a moment at each terminal as the motor moves past the switch's terminal.
  5. If there is no continuity for a moment at each terminal, replace the mode control motor (see MODE CONTROL MOTOR REPLACEMENT  ).
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