Code C: Sunlight Sensor
WARNING: This page is about a different car, the 1999 Acura 3.0CL and 1999 Acura 2.3CL. However, it is still accessible from the selected car via links, so may be relevant.
- Remove stereo unit and disconnect climate control unit 20-pin connector. Remove sunlight sensor and disconnect connector. Check for continuity between ground and terminal No. 13 (White/Red wire) of climate control unit 20-pin connector. See Figure .
- If continuity exists, repair shorted White/Red wire between climate control unit and sunlight sensor. If continuity does not exist, check for continuity in White/Red wire between climate control unit and sunlight sensor. If continuity does not exist, repair open White/Red wire between climate control unit and sunlight sensor.
- If continuity exists, check for continuity in Yellow/Green wire between climate control unit connector and sunlight sensor connector. If continuity does not exist, repair open Yellow/Green wire between climate control unit and sunlight sensor. If continuity exists, reconnect sunlight sensor connector.
- Test sunlight sensor. See SUNLIGHT SENSOR under TESTING. If sunlight sensor is okay, check for loose wires or poor connections at climate control unit 20-pin connector and sunlight 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.