Sunlight Sensor Test

Sunlight Sensor Test

NOTE: Before testing the sensor, check for HVAC DTCs How to Troubleshoot the Climate Control System.

1. Remove the sunlight sensor Service and Repair.

With automatic lighting sensor





Without automatic lighting sensor





2. Turn the ignition switch to ON (II). Measure the voltage between the terminals with the (+) probe on terminal No. 4 (with automatic lighting sensor) or No. 1 (without automatic lighting sensor) and the (-) probe on terminal No. 2 with the connector connected.

NOTE: The voltage readings will not change under the light of a flashlight or a fluorescent lamp. Voltage should be:

- 3.6-3.7 V or more with the sensor out of direct sunlight.
- 3.3-3.5 V or less with the sensor in direct sunlight.

3. If the voltage is not as specified, replace the sunlight sensor Service and Repair.