| DTC B1228 or DTC indicator D: | A Short 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 B1228 or D indicated? YES - Go to 5. NO - Intermittent failure.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 body ground and the climate control unit 32P connector terminals No. 19 and No. 25 individually.
Is there continuity? YES - Repair short to body ground in the wires between the climate control unit and the outside air temperature sensor.n NO - Go to 9. |
| 9. | Check for continuity between the climate control unit 32P connector terminals No. 19 and No. 25.
Is there continuity? YES - Repair short in the wires between the climate control unit and the outside air temperature sensor.n NO - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.n |