Sunlight Sensor Test

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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:
- 3.56 V with no sunlight or the sensor covered up
- Less than 3.56 V with the sunlight on sensor (depending on sunlight intensity)
  
  Fig 1: Measuring Voltage Between Sunlight Sensor Connector Terminals No. 2 And No. 4
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the voltage is not as specified, replace the sunlight sensor (see SUNLIGHT SENSOR REPLACEMENT ).