Sunlight Sensor Test

NOTE: Before testing, check for HVAC DTCs (see HOW TO CHECK FOR DTCS WITH THE HDS ).

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 terminals with the (+) probe on terminal No. 4 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.
  
  Fig 1: Measuring Voltage Between Terminals With (+) Probe On Terminal No. 4 And (-) Probe On Terminal No. 2 With Connector Connected
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the voltage is not as specified, replace the sunlight sensor (see SUNLIGHT SENSOR REPLACEMENT ).