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 D: EVAPORATOR TEMPERATURE SENSOR
1998 Acura 3.5RL Special Edition
Code D: Evaporator Temperature Sensor
1998 Acura 3.5RL Special EditionSECTION Code D: Evaporator Temperature Sensor
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.
CAUTION:
To avoid damage to sensor, use an ohmmeter with a measuring current of one milliamp or less.
- Disconnect evaporator temperature sensor connector. Measure sensor resistance at specified temperatures. Refer to EVAPORATOR TEMPERATURE SENSOR RESISTANCE table under TESTING. If resistance is not as specified, replace sensor.
- If resistance is within specifications, remove stereo unit and disconnect climate control unit 20-pin connector. Check for continuity between ground and terminal No. 18 (Brown wire) of climate control unit 20-pin connector. See Figure . If continuity exists, repair shorted Brown wire between climate control unit and evaporator temperature sensor.
- If continuity does not exist, check for continuity in Brown wire between climate control unit connector and evaporator temperature sensor connector. If continuity does not exist, repair open Brown wire between climate control unit and evaporator temperature sensor.
- If continuity exists, check for continuity in Yellow/Green wire between climate control unit connector and evaporator temperature sensor. If continuity does not exist, repair open Yellow/Green wire between climate control unit and evaporator temperature sensor.
- If continuity exists, check for loose wires or poor connections at climate control unit 20-pin connector and evaporator temperature sensor 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.