2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Rear Window Defogger Signal Check

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK REAR WINDOW DEFOGGER SWITCH LAMP 

    A/C and AV switch self-diagnosis is executed. Refer to A/C AND AV SWITCH SELF-DIAGNOSIS FUNCTION .

    1. Does rear window defogger switch light? 

    OK or NG

    1. OK : GO TO 2.
    2. NG : Replace A/C and AV switch.
  2. CHECK AV COMMUNICATION LINE 

    AV communication line check is executed. Refer to AV COMMUNICATION LINE CHECK .

    1. Is rear window defogger displayed on the display? 

    OK or NG

    1. OK : GO TO 3.
    2. NG : Replace display control unit.
  3. CHECK CAN COMMUNICATION LINE 

    CAN communication line check is executed. Refer to CAN COMMUNICATION LINE CHECK .

    OK or NG

    1. OK : Check the condition of the harness and the connector.
    2. NG : In addition, it is necessary to check CAN communication line. Refer to CAN COMMUNICATION LINE CHECK .
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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.