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.
Is there continuity?
YES -
Repair a short in the wires between the climate control unit and the outside air temperature sensor.?
NO -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:
Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
E and Auto
DTC Troubleshooting: B1229 (E and AUTO)
DTC B1229 or DTC indicator E and AUTO:
