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Ignition Switch Illumination: Inspection

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK IGNITION SWITCH ILLUMINATION  .
    1. Turn the ignition switch to ON.
    2. Check the lighting condition of the ignition switch illumination.

    Does the ignition switch illumination blink?

    Yes  : Check the function setting of body integrated unit. Ref. to BODY CONTROL (DIAGNOSTICS)>REGISTRATION BODY INTEGRATED UNIT

    No  : Go to  2.

  2. CHECK IGNITION SWITCH ILLUMINATION OPERATION  .
    1. Turn the ignition switch to OFF.
    2. Open and close the driver's side door.

    When door is opened/closed, does the ignition switch illumination switch between ON ←→ OFF?

    Yes  : Ignition switch illumination is normal.

    No  : Go to  3.

  3. CHECK CURRENT DATA  .

    Using Subaru Select Monitor, display data of [Driver's door SW input] in [Data Monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR

    Does the display change to [ON] ←→ [OFF], when the door is opened/closed?

    Yes  : Go to  4.

    No  : Check the door switch circuit. Ref. to SECURITY AND LOCKS>DOOR LOCK CONTROL SYSTEM>INSPECTION>CHECK DOOR SWITCH

  4. CHECK CURRENT DATA  .

    Using Subaru Select Monitor, display data of [key illumination lamp o/p] in [Data Monitor] of [Body Control]. Ref. to COMMON (DIAGNOSTICS)>DATA MONITOR

    Does the display change to [ON] ←→ [OFF], when the door is opened/closed?

    Yes  : Check the ignition switch illumination circuit, and repair or replace the harness.

    No  : Check the body integrated unit and replace it if defective.

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