DTC Troubleshooting: 1
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 a change in resistance by heating or cooling the sensor with a hair drier.
 IN-CAR TEMPERATURE SENSOR-1014 0 3210 5020 6830 8640 °C 104 °FTEMPERATURERESISTANCE kW121110987654321 *Is the resistance within the specifications shown on the graph? YES - Go to 3. NO - Replace the in-car temperature sensor.n |
| 3. | Disconnect climate control unit connectors A (12P) and B (16P). |
| 4. | Check for continuity between the No. 11 terminal of climate control unit connector A (12P) and the No. 2 terminal of the in-car temperature sensor 2P connector.
 LT BLULT BLUIN-CAR TEMPERATURE SENSOR 2P CONNECTORWire side of female terminalsWire side of female terminalsCLIMATE CONTROL UNIT CONNECTOR A (12P)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. 5 terminal of climate control unit connector B (16P) and the No. 1 terminal of the in-car temperature sensor 2P connector.
 LT GRNLT GRNIN-CAR TEMPERATURE SENSOR 2P CONNECTORWire side of female terminalsWire side of female terminalsCLIMATE CONTROL UNIT CONNECTOR B (16P)Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (12P) and B (16P) 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 |