2003 Acura MDX BaseFACTORY OEM SERVICE PROCEDURE

Sunlight Sensor Test

WARNING: This page is about a different car, the 2009 Acura MDX, 2008 Acura MDX, and 2007 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the sunlight sensor from the dashboard (see SUNLIGHT SENSOR REPLACEMENT  ).
  2. Connect the sunlight sensor 5P connector.
  3. Turn the ignition switch to ON (II). Measure the voltage between the terminals with the (+) probe on the No. 4 terminal and the (-) probe on the 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 And (-) Probe On No. 2 Terminal With Connector
      G05487691Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. If the voltage is not as specified, replace the sunlight sensor (see SUNLIGHT SENSOR REPLACEMENT  ).
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.