| DTC indicator A: | An Open in the In-car Temperature Sensor Circuit |
| 1. | Clear the DTC by turning the ignition switch OFF, and then ON (II). |
| 2. | Operate the climate control system in several modes. |
| 3. | Check for DTCs using the self-diagnostic. Is DTC A indicated? YES - Go to 4. NO - Intermittent failure, check for loose wires or poor connections on the in-car temperature sensor circuit.n |
| 4. | Turn the ignition switch OFF. |
| 5. | Remove the in-car temperature sensor and test it. Does the in-car temperature sensor test OK? YES - Go to 6. NO - Replace the in-car temperature sensor.n |
| 6. | Disconnect climate control unit 28P connector. |
| 7. | Check for continuity between the No. 28 terminal of climate control unit 28P 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. 18 terminal of climate control unit 28P 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 climate control unit 28P 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 |