Go to step 9.
9. Check for continuity between climate control unit connector A (40P) terminals No. 5 and No. 8.
Is there continuity?
YES -
Repair a short in the wires between the climate control unit and the in-car 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.?
B1227
DTC Troubleshooting: B1227 (C and AUTO)
DTC B1227 or DTC indicator C and AUTO:
An Open in the Outside Air Temperature Sensor Circuit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1227 or C and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the outside air temperature sensor circuit.?
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 outside air temperature sensor 2P connector
