3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1228 or D and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure.?
5. Turn the ignition switch to LOCK (0).
6. Remove the outside air temperature sensor See: Heating and Air Conditioning/Ambient Temperature Sensor / Switch HVAC/Service and
Repair, and test it See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Outside Air
Temperature Sensor Test.
Is the outside air temperature sensor OK?
YES -
With the outside air temperature sensor disconnected, go to step 7.
NO -
Replace the outside air temperature sensor See: Heating and Air Conditioning/Ambient Temperature Sensor / Switch HVAC/Service and Repair.?
7. Disconnect climate control unit connector A (40P).
8. Check for continuity between climate control unit connector A (40P) terminal No. 28 and body ground.
Is there continuity?
YES -
Repair a short to body ground in the wire between the climate control unit and the outside air temperature sensor.?
NO -
Go to step 9.
9. Check for continuity between climate control unit connector A (40P) terminals No. 8 and No. 28.
