Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSHONDA2006RIDGELINE RTLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 11 (HEATING/AIR CONDITIONING)FRONT AIR MIX CONTROL MOTOR TEST

2006 Honda Ridgeline RTL

Front Air Mix Control Motor Test

2006 Honda Ridgeline RTLSECTION Front Air Mix Control Motor Test

WARNING: This page is about a different car, the 2008 Honda Pilot, 2007 Honda Pilot, and 2006 Honda Pilot. However, it is still accessible from the selected car via links, so may be relevant.

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.
Connect battery power to the No. 1 terminal of the air mix control motor, and ground the No. 2 terminal; 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.
If the air mix control motor does 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.
- If the linkage or door sticks or binds, repair them as needed.
- If the air mix control motor runs smoothly, go to step 4.
  
  Fig 1: Identifying Air Mix Control Motor Terminals
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the resistance between the No. 5 and No. 7 terminals. It should be between 4.2 to 7.8 k Ω.
Reconnect the air mix control motor 7P 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 0.7 V

Max Hot - about 4.2 V
If either the resistance or voltage readings are not as specified, replace the air mix control motor.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.