B1230

DTC B1230 or TS Sensor short is indicated.:
Short in the Sunlight Sansor Circuit

1. Clear the DTC with the HDS.
2. Operate the climate control system in several modes.
3. Check for DTCs using the HDS or self-diagnostic.

Is DTC B1230 or TS sensor short indicated?

YES - Go to step 4.

NO - Intermittent failure.

4. Turn the ignition switch OFF.
5. Disconnect the sunlight sensor 5P connector.
6. Disconnect the climate control unit 40P connector.




7. Check for continuity between the No. 18 terminal of the climate control unit 40P connector 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. Check for continuity between the No. 18 terminal and the No. 33 terminal of the climate control unit 40P connector.

Is there continuity?

YES - Repair short in the wires between the climate control unit and the sunlight sensor.

NO - Go to step 9.

9. Reconnect the sunlight sensor 5P connector.
10. Reconnect the climate control unit 40P connector.
11. Test the sunlight sensor.

Is the sunlight sensor OK?

YES - Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit.

NO - Replace the sunlight sensor.