Sunlight Sensor Test

NOTE: Before testing, check for HVAC DTCs. (see GENERAL TROUBLESHOOTING INFORMATION )

Remove the sunlight sensor from the dashboard (see SUNLIGHT SENSOR REPLACEMENT ).
Connect the sunlight sensor 5P connector.
Turn the ignition switch to ON (II). Measure the voltage between the terminals with the (+) probe on No. 4 terminal and the (-) probe on No. 2 terminal 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.
Fig 1: Measuring Voltage Between Terminals With (+) Probe On No. 4 Terminal & (-) Probe On No. 2 Terminal
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the voltage is not as specified, replace the sunlight sensor (see SUNLIGHT SENSOR REPLACEMENT ).