B1230

DTC B1230 or DTC indicator F: A Short in the Sunlight Sensor Circuit

1. Clear the DTC.
2. Turn the ignition switch OFF, and then ON.
3. Operate the climate control system in several modes.
4. Check the DTCs.

Is DTC B1230 or F indicated?

YES - Go to step 5.

NO - Intermittent failure.

5. Disconnect the sunlight sensor 2P connector.
6. Disconnect audio-HVAC display panel connector A (22P).




7. Check for continuity between the No. 13 terminal of audio-HVAC display panel connector A (22P) and body ground.

Is there continuity?

YES - Repair short to body ground in the wire between the climate control unit and the sunlight sensor.

NO - Go to step 8.

8. Reconnect the sunlight sensor 2P connector.
9. Reconnect audio-HVAC display panel connector A (22P).
10. Test the sunlight sensor.

Is the sunlight sensor OK?

YES - Substitute a known-good audio-HVAC display panel, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display panel.

NO - Replace the sunlight sensor.