Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Honda >> 2012 >> Ridgeline RTL >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating/Air Conditioning >> Air Mix Control Motor Test

Air Mix Control Motor Test

NOTE: Before testing, check for HVAC DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Disconnect the 7P connector from the air mix control motor.
    NOTE: Incorrectly applying power and ground to the air mix control motor will damage it. Follow the instructions carefully.
  2. Connect battery power to terminal No. 1 of the air mix control motor, and ground terminal No. 2; the air mix control motor should run, and stop at Max Cool. If it doesn't, reverse the connections; the air mix control motor should run, and stop at Max Hot. When the air mix control motor stops running, disconnect battery power immediately.
    Fig 1: Identifying Air Mix Control Motor Connector Terminal
    G05968435Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. If the air mix control motor did not run in step 2, remove it, then check the air mix control linkage and door for smooth movement.
    • If the linkage and door move smoothly, replace the air mix control motor (see AIR MIX CONTROL MOTOR TEST ).
    • If the linkage or door sticks or binds, repair them as needed.
    • If the air mix control motor runs smoothly, Go to step 4.
  4. Measure the resistance between terminal No. 5 and No. 7 of the air mix control motor. It should be between 4.2 and 7.8 kΩ.
  5. Reconnect the air mix control motor 7P connector, then turn the ignition switch ON (II).
  6. Using the backprobe set, measure the voltage between terminals No. 3 and No. 5.

    Max Cool: About 0.5 V 

    Max Hot: About 4.5 V 

  7. If either the resistance or the voltage readings are not as specified, replace the air mix control motor (see AIR MIX CONTROL MOTOR TEST ).
scientia non olet · About Mike's Workshop Manuals