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Code C: Sunlight Sensor

  1. 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 .
  2. 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.
  3. 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.
  4. Test sunlight sensor. See SUNLIGHT SENSOR 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.
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