DTC Troubleshooting: 1
| DTC 1: | An Open in the In-car Temperature Sensor Circuit |
| 1. | Remove the in-car temperature sensor. |
| 2. | 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 dryer.
*Is the resistance within the specifications shown on the graph? YES - NO - Replace the in-car temperature sensor.n |
| 3. | Disconnect the climate control unit 36P connector. |
| 4. | Check for continuity between the No. 8 terminal of the climate control unit 36P connector and the No. 1 terminal of the in-car temperature sensor 4P connector.
Is there continuity? YES - Go to 5. NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.n |
| 5. | Check for continuity between the No. 2 terminal of the climate control unit 36P connector and the No. 2 terminal of the in-car temperature sensor 4P connector.
Is there continuity? YES - Check for loose wires or poor connections at the climate control unit 36P connector and at the in-car temperature sensor 4P 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.n NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.n |
| 6. | Disconnect the climate control unit 36P connector. |
| 7. | Check for continuity between the No. 8 terminal of the climate control unit 36P connector and the No. 2 terminal of the in-car temperature sensor 2P connector.
Is there continuity? YES - Go to 8. NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.n |
| 8. | Check for continuity between the No. 2 terminal of the climate control unit 36P connector and the No. 1 terminal of the in-car temperature sensor 2P connector.
Is there continuity? YES - Check for loose wires or poor connections at the climate control unit 36P connector 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.n NO - Repair open in the wire between the climate control unit and the in-car temperature sensor.n |