LIGHTING SYSTEM Engine Switch Illumination Circuit

DESCRIPTION

The engine switch illumination is controlled by the main body ECU. The operation and condition of this control are described below (Light control switch is OFF).

Operation Condition
Fade in

When any of the following conditions is met, the engine switch illumination fades in.


  • The key enters any actuation area around the doors when the engine switch is off and all the doors are closed.

  • Any door is opened.

  • Any door is unlocked when the engine switch is off and all the doors are closed.

  • The engine switch is turned from on (ACC) to off when all the doors are closed.
Fade out immediately

When either of the following conditions is met, the engine switch illumination fades out.


  • The engine switch is turned from off to on (ACC) or on (IG) when all the doors are closed.

  • All the doors are locked when the engine switch is off.
Illuminate for approximately 15 seconds, and then fade out All the doors are closed when the engine switch is off.

WIRING DIAGRAM

A0158V8E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ENGINE SWITCH

    A0158ETE35

    1. Remove the engine switch Click here.

    2. Apply battery voltage to the engine switch.

    3. Check that the illumination comes on.

      OK
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal 11 (SWIL)

      Battery negative (-) → Terminal 5 (GND)

      		 Engine switch illumination comes on

    NG

    REPLACE ENGINE SWITCH Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)


    1. A01570VE01

      Disconnect the E1 ECU connector.

    2. Disconnect the E18 engine switch connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E1-11 (SWIL) - E1-25 (SWIL) Always Below 1 Ω
      E18-5 (GND) - Body ground
      E1-11 (SWIL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU