Code A: In-Car Temperature Sensor
WARNING: This page is about a different car, the 1998 Acura 3.5RL. 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.
- Remove in-car temperature sensor. See IN-CAR TEMPERATURE SENSOR R & I . Measure resistance across sensor connector terminals. See IN-CAR TEMPERATURE SENSOR RESISTANCE table under TESTING. If resistance is not as specified, replace sensor.
- If resistance is within specifications, remove climate control unit and disconnect 8-pin and 20-pin connectors. Check for continuity between ground and terminal No. 6 (Brown/Black wire) of climate control unit 20-pin connector. See Figure . If continuity exists, repair shorted Brown/Black wire between climate control unit and in-car temperature sensor.
- If continuity does not exist, check for continuity in Brown/Black wire between climate control unit 20-pin connector and in-car temperature sensor. If continuity does not exist, repair open Brown/Black wire between climate control unit and in-car temperature sensor.
- If continuity does exist, check for continuity in Pink/Blue wire between climate control unit 8-pin connector and in-car temperature sensor. If continuity does not exist, repair open Pink/Blue wire between climate control unit and in-car temperature sensor.
- If continuity does exist, check for loose wires or poor connections at climate control unit 8-pin and 20-pin connectors and in-car 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.