ENTRY AND START SYSTEM (for Start Function) Engine Switch Indicator Circuit

DESCRIPTION

The engine switch condition (power source mode) or system malfunctions can be checked by observing the status of the engine switch indicator light.

Engine Switch Indicator Light Condition
Power Source Mode/Condition Indicator Light Condition
Brake Pedal Released Brake Pedal Depressed, Shift Lever in P
Off Off Illuminates (green)
On (ACC), on (IG) Illuminates (amber) Illuminates (green)
Engine running Off Off
Steering lock not unlocked Flashes (green) for 30 seconds Flashes (green) for 30 seconds
System malfunction Flashes (amber) for 15 seconds Flashes (amber) for 15 seconds
Stop light switch malfunction with shift lever in P Flashes (green) for 15 seconds Flashes (green) for 15 seconds

WIRING DIAGRAM

A01EO1NE04

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ENGINE SWITCH

    A01ERZSE07

    1. Disconnect the E18 engine switch connector.

    2. Apply battery voltage to the terminals of the engine switch, and check the illumination condition of the engine switch indicator light.

      Note


      • If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator light will not illuminate.

      • If the voltage is too low, the indicator light will not illuminate.

      OK
      Measurement Condition Condition Specified Condition
      Battery terminal (+) → Terminal 11 (SWIL) - Battery terminal (-) → Terminal 5 (GND) Battery voltage is applied to the terminals Illuminates
      Battery terminal (+) → Terminal 12 (INDS) - Battery terminal (-) → Terminal 5 (GND)
      Battery terminal (+) → Terminal 13 (INDW) - Battery terminal (-) → Terminal 5 (GND)
      Result
      Result Proceed to
      OK A
      NG (for 3UR-FE) B
      NG (for 1UR-FE) C

    B

    REPLACE ENGINE SWITCH Click here

    C

    REPLACE ENGINE SWITCH Click here

    A

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

    A01EPINE07

    1. Disconnect the E1 main body 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
      E1-25 (SWIL) - E18-11 (SWIL) Always Below 1 Ω
      E1-15 (INDS) - E18-12 (INDS) Always Below 1 Ω
      E1-14 (INDW) - E18-13 (INDW) Always Below 1 Ω
      E18-5 (GND) - Body ground Always Below 1 Ω
      E1-25 (SWIL) or E18-11 (SWIL) - Body ground Always 10 kΩ or higher
      E1-15 (INDS) or E18-12 (INDS) - Body ground Always 10 kΩ or higher
      E1-14 (INDW) or E18-13 (INDW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)