B1229
DTC B1229: An Open in the Sunlight Sensor Circuit1. Clear the DTC.
2. Turn the ignition switch OFF, and then ON.
3. Operate the climate control system is several modes.
4. Check the DTCs.
Is DTC E or B1229 indicated?
YES - Go to step 5.
NO - Intermittent failure, check for loose wires or poor connections on the sunlight sensor circuit.
5. Test the sunlight sensor.
Is the sunlight sensor OK?
YES - Go to step 6.
NO - Replace the sunlight sensor.
6. Disconnect the sunlight sensor 2P connector.
7. Disconnect audio-HVAC display panel connector A (22P).
8. Check for continuity between the No.13 terminal of audio-HVAC display panel connector A (22P) and the No.1 terminal of the sunlight sensor 2P connector.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the audio-HVAC display panel and the sunlight sensor.
9. Check for continuity between the No.15 terminal of audio-HVAC display panel connector A (22P) and the No.2 terminal of the sunlight sensor 2P connector.
Is there continuity?
YES - Check for loose wires or poor connections at audio-HVAC display panel connector A (22P) and at the sunlight sensor 2P connector. If the connections are good, substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.
NO - Repair open in the wire between the audio-HVAC display panel and the sunlight sensor.