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 MANUALSACURA19983.5RL SPECIAL EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 15 (A/C-HEATER SYSTEM)SELF-DIAGNOSTICSCODE E: AIR MIX CONTROL MOTOR
1998 Acura 3.5RL Special Edition
Code E: Air Mix Control Motor
1998 Acura 3.5RL Special EditionSECTION Code E: Air Mix Control Motor
WARNING: This page is about a different car, the 1998 Acura 3.0CL and 1998 Acura 2.3CL. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect air mix control motor 5-pin connector. Test air mix control motor. See AIR MIX CONTROL MOTOR TESTING . If air mix control motor is okay, go to step 3). If air mix control motor is not okay, remove air mix control motor. See AIR MIX CONTROL MOTOR R & I .
- Check air mix control motor linkage and doors for smooth operation. If doors and linkage operate smoothly, replace air mix control motor. If doors and linkage DO NOT operate smoothly, repair air mix control motor doors and linkage.
- Remove stereo unit. Disconnect climate control unit 12-pin and 20-pin connectors. Individually check for continuity between ground and terminal No. 3 and 4 (Red/White and Red/Yellow wires) of 12-pin connector, and between ground and terminal No. 2, 12, 17 (Gray, Yellow/Green and Pink/Black wires) of 20-pin connector. See Figure .
- If continuity exists, repair shorted wire(s) between climate control unit and air mix control motor. If continuity does not exist, individually check 12-pin connector terminal No. 3 and 4 (Red/White and Red/Yellow wires), and 20-pin connector terminal No. 2, 12, and 17 (Gray, Yellow/Green and Pink/Black wires) for voltage. See Figure .
- If voltage exists, repair short to power in wire(s) between climate control unit and air mix control motor. If short to power exists, climate control unit must be replaced. If voltage does not exist, check all wires for continuity between air mix control motor 5-pin connector and climate control unit connectors. If continuity does not exist in all wires, repair open in wire(s) between climate control unit and air mix control motor.
- If continuity exists, check for loose wires or poor connections at climate control unit 12-pin and 20-pin connectors, and air mix control motor 5-pin connector. If connections are okay, substitute known-good climate control unit and recheck. If symptom does not exist with known-good climate control unit, replace original climate control unit.
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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.