Fault Code 12

1. Disconnect the 21-way connector at the control module.
2. Check for continuity between terminal 20 and ground.
- If there is continuity, repair the wiring and retest.
- If there is no continuity, go to step 3.

Fault Code 11:

3. Measure the resistance between terminals 20 and 7. Compare the measured value to the chart.
- If the measured value is incorrect, replace the in-car temperature sensor.