B1227

DTC B1227: An Open in the Outside Air Temperature Sensor Circuit

1. Clear the DTC.
2. Turn the ignition switch OFF, and then ON.
3. Operate the climate control system is several modes.
4. Check the DTCs.

Is DTC C or B1227 indicated?

YES - Go to step 5.

NO - Intermittent failure, check for loose wires or poor connections on the outside air temperature sensor circuit.

5. Remove the outside air temperature sensor and test it.

Does the outside air temperature sensor test OK ?

YES - Go to step 6.

NO - Replace the outside air temperature sensor.

6. Disconnect climate control unit connector A (22P).




7. Check for continuity between the No.12 terminal of audio-HVAC display panel connector A (22P) and the No.1 terminal of the outside air temperature sensor 2P connector.

Is there continuity?

YES - Go to step 8.

NO - Repair open in the wire between the audio-HVAC display panel and the outside air temperature sensor.




8. Check for continuity between the No.15 terminal of audio-HVAC display panel connector A (22P) and the No.2 terminal of the outside air temperature sensor 2P connector

Is there continuity?

YES - Check for loose wires or poor connections at audio-HVAC display panel connector A (22P) and at the outside air temperature sensor 2P connector. If the connections are good, substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.

NO - Repair open in the wire between the audio HVAC display panel and the outside air temperature sensor.