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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 15 (A/C-HEATER SYSTEM)TROUBLE SHOOTINGRECIRCULATION CONTROL MOTOR DOES NOT OPERATE DOORS
1998 Acura 3.5RL Special Edition
RECIRCULATION Control Motor Does Not Operate Doors
1998 Acura 3.5RL Special EditionSECTION RECIRCULATION Control Motor Does Not Operate Doors
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.
- Check fuse No. 8 (7.5-amp) in underdash fuse/relay block. If fuse is blown, replace fuse. If necessary, repair short to ground. If fuse is okay, disconnect recirculation control motor 4-pin connector. Turn ignition on. Check for voltage between ground and Black/Yellow wire terminal of recirculation control motor 4-pin connector. If battery voltage does not exist, repair open wire between fuse No. 8 and recirculation control motor.
- If battery voltage exists, turn ignition off. Test recirculation control motor. See RECIRCULATION CONTROL MOTOR TESTING . If motor is okay, go to step 4). If motor is not okay, remove recirculation control motor. See RECIRCULATION CONTROL MOTOR .
- Check recirculation control linkage and doors for smooth operation. If linkage and doors are okay, replace recirculation control motor. If linkage and doors are not okay, repair control linkage and doors.
- Remove stereo unit and disconnect climate control unit 20-pin connector. Individually check for continuity between ground and terminal No. 4 (Green/Red wire) and No. 3 (Green/White wire) of climate control unit 20-pin connector. See Figure . If continuity exists, repair shorted wire(s) between recirculation control motor and climate control unit.
- If continuity does not exist, individually check for voltage between ground and terminals No. 4 (Green/Red wire) and No. 3 (Green/White wire) of the climate control unit 20-pin connector. See Figure . If voltage exists, repair short to power in wire(s) between recirculation control motor and climate control unit. If short to blower exists, climate control unit must be replaced.
- If voltage does not exist, check for continuity in Green/White wire and Red/Green wire between recirculation control motor 4-pin connector and climate control unit 20-pin connector. If continuity does not exist, repair open in wire(s) between recirculation control motor and climate control unit.
- If continuity exists, check for loose wires or poor connections at climate control unit 20-pin connector and recirculation control motor 4-pin connector. If connections are okay, substitute known-good climate control unit and recheck. If symptom does not exist after substituting 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.