DTC B1227 or DTC indicator C: | An Open in the Outside Air Temperature Sensor Circuit |
1. | Clear the DTC with the HDS. |
2. | Turn the ignition switch OFF, and then ON (II). |
3. | Do the self-diagnostic with the HDS or climate control unit. |
4. | Check for DTCs. Is DTC B1227 or C indicated? YES - Go to 5. NO - Intermittent failure, check for loose wires or poor connections on the outside air temperature sensor circuit.n |
5. | Turn the ignition switch OFF. |
6. | Remove the outside air temperature sensor and test it. Is the outside air temperature sensor OK? YES - Go to 7. NO - Replace the outside air temperature sensor.n |
7. | Disconnect the climate control unit 32P connector. |
8. | Check for continuity between the climate control unit 32P connector terminal No. 25 and the outside air temperature sensor 2P connector terminal No. 1.
Is there continuity? YES - Go to 9. NO - Repair open in the wire between the climate control unit and the outside air temperature sensor.n |
9. | Check for continuity between the climate control unit 32P connector terminal No. 19 and the outside air temperature sensor 2P connector terminal No. 2.
Is there continuity? YES - Check for loose wires or poor connections at the climate control unit 32P connector and at the outside air 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 outside air temperature sensor.n |