4-door DTC 1: An Open in the In-car Temperature Sensor Circuit Remove the in-car temperature sensor (see page 21-149). Measure the resistance between the No. 1 and No. 2 terminals of the in-car temperature sensor. *Check for change in resistance by heating or cooling the sensor with a hair drier. IN-CAR TEMPERATURE SENSOR *Is the resistance within the specifications shown on the graph? YES -Go to step 3. NO - Replace the in-car temperature sensor. Disconnect climate control unit connector B (22P).

Check for continuity between the No. 9 terminal of climate control unit connector B (22P) and the No. 1 terminal of the in-car temperature sensor 2P connector. CLIMATE CONTROL UNIT CONNECTOR B (22P) Wire side of female terminals IN-CAR TEMPERATURE SENSOR 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Go to step 5. NO -Repair open in the wire between the climate control unit and the in-car temperature sensor. Disconnect climate control unit connector A (14P). Check for continuity between the No. 2 terminal of climate control unit connector A (14P) and the No. 2 terminal of the in-car temperature sensor 2P connector. CLIMATE CONTROL UNIT CONNECTOR A (14P) Wire side of female terminals IN-CAR TEMPERATURE SENSOR 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (14P) and B (22P) and at the in-car temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit. NO -Repair open in the wire between the climate control unit and the in-car temperature sensor.