Circuit/System Verification
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, cover the sunload sensor assembly with a shop towel or other suitable item. Verify the scan tool Right Sunload Sensor and Left Sunload Sensor parameters are within 3 counts of each other.
- If not within the specified range, refer to Sunload Sensor Circuit Malfunction .
- Remove the shop towel and shine a flashlight on the sunload sensor assembly. Verify the scan tool Right Sunload Sensor and Left Sunload Sensor parameters are within 3 counts of each other.
- If not within the specified range, refer to Sunload Sensor Circuit Malfunction .
- Measure actual outside air temperature using a thermometer. Compare this value to the scan tool Outside Air Temp. Raw parameter. The measured temperature should be within 5 degrees of parameter.
- If not within the specified range, refer to Ambient Air Temperature Sensor Circuit Malfunction .
- Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.
- If not within the specified range, refer to Inside Air Temperature Sensor Circuit Malfunction .
- Measure actual evaporator air temperature using a thermometer. Compare this value to the scan tool A/C Evap. Temperature Sensor parameter. The measured temperature should be within 5 degrees of the parameter.
- If not within the specified range, refer to Ambient Air Temperature Sensor Circuit Malfunction .