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 MANUALSACURA20043.5RLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 54 (AUTOMATIC A/C SYSTEMS)AIR MIX CONTROL MOTOR TEST

2004 Acura 3.5RL

Air Mix Control Motor Test

2004 Acura 3.5RLSECTION Air Mix Control Motor Test

WARNING: This page is about a different car, the 2003 Acura 3.2CL and 2002 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the 5P connector from the air mix control motor.
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 Hot. If it doesn't, reverse the connections; the air mix control motor should run, and stop at Max Cool. If the air mix control motor does not run, 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.
Fig 1: Identifying Air Mix Control Motor Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the resistance between the No.4 and No.5 terminals. It should be between 2.1 k to 3.9 k Ω.
Reconnect the air mix control motor 5P connector, then turn the ignition switch ON (II).
Measure the voltage between the No. 3 and No. 5 terminals at max cool and max hot.
Max Cool - about 1 V

Max Hot - about 4 V
If either the resistance or voltage readings are not as specified, replace the air mix cotrol motor.

RENDER: 1.0x

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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.