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 16 (A/C-HEATER SYSTEM)TESTINGHEATER VALVE CONTROL SOLENOID
1998 Acura 3.5RL Special Edition
Heater Valve Control Solenoid
1998 Acura 3.5RL Special EditionSECTION Heater Valve Control Solenoid
WARNING: This page is about a different car, the 1998 Acura 2.5TL. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect heater valve control solenoid connector. Check for continuity between heater valve control solenoid terminals. If continuity exists, go to next step. If continuity does not exist, replace heater valve control solenoid.
- Disconnect vacuum hose No. 2 from intake manifold. See Fig 1 . Connect vacuum pump to vacuum hose No. 2. Connect battery voltage to heater valve control solenoid terminal No. 2 and ground terminal No. 1.
- Check that heater valve rod is pulled toward diaphragm when vacuum is applied, and that rod returns to original position when power is disconnected. If heater valve rod does not operate as indicated, replace heater valve control solenoid.
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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.