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.?
B1229
DTC Troubleshooting: B1229 (E and AUTO)
DTC B1229 or DTC indicator E and AUTO:
An Open in the Sunlight 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 B1229 or E and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the sunlight sensor circuit.?
5. Turn the ignition switch to LOCK (0).
6. Disconnect the sunlight sensor 5P connector.
7. Disconnect climate control unit connector A (40P).
8. Check for continuity between climate control unit connector A (40P) terminal No. 29 and sunlight sensor 5P connector terminal No. 4.
Is there continuity?
YES -
Go to step 9.
NO -
Repair an open in the wire between the climate control unit and the sunlight sensor.?
9. Check for continuity between climate control unit connector A (40P) terminal No. 8 and sunlight sensor 5P connector terminal No. 2.
