THEFT DETERRENT SYSTEM Security Indicator Light Circuit

DESCRIPTION

Even when the theft deterrent system is in the disarmed state, the security indicator blinks due to a signal output from the immobiliser system. The security indicator blinks continuously due to a continuous signal received from the immobiliser system while in the armed state.

The main body ECU RH causes the security indicator to light up or blink only during the arming preparation state and alarm sounding state.

WIRING DIAGRAM

A01639OE01

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Select the item below in the Active Test and then check that the indicator operates.

      Body
      Tester Display Test Part Control Range Diagnostic Note
      Security Indicator Security indicator ON/OFF -
      OK
      The security indicator light turns on or off correctly when operating through the tester..

    NG

    INSPECT SECURITY INDICATOR Click here

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  2. INSPECT SECURITY INDICATOR


    1. A016390E02

      w/ Navigation System:


      1. Remove the multi-display assembly Click here.

      2. Apply battery voltage to the terminals of the multi-display and check the lighting condition of the security indicator.

        Standard
        Measurement Condition Specified Condition

        Battery positive (+) → Terminal J50-19 (SEUC)

        Battery negative (-) → Terminal J50-10 (GND1)

        		 Lights up

        Note


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

        • Voltage of more than 12 V will damage the security indicator.

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

    2. A0161O4E02

      w/o Navigation System:


      1. Remove the integration control and panel assembly Click here.

      2. Apply battery voltage to the terminals of the center cluster integration switch and check the lighting condition of the security indicator.

        Standard
        Measurement Condition Specified Condition

        Battery positive (+) → Terminal J54-9 (SEUC)

        Battery negative (-) → Terminal J54-8 (E)

        		 Lights up

        Note


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

        • Voltage of more than 12 V will damage the security indicator.

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

        Result
        Result Proceed to
        NG (w/ Navigation System) A
        NG (w/o Navigation System) B
        OK C

    A

    REPLACE MULTI-DISPLAY ASSEMBLY Click here

    B

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    C

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - MULTI-DISPLAY OR INTEGRATION CONTROL)


    1. A01623EE01

      w/ Navigation System:


      1. Disconnect the J74 main body ECU RH connector and J50 multi-display assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J74-24 (IND) - J50-19 (SEUC) Always Below 1 Ω
        J74-24 (IND) - Body ground Always 10 kΩ or higher
    2. A0161NZE01

      w/o Navigation System:


      1. Disconnect the J74 main body ECU RH connector and J54 integration control and panel assembly connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J74-24 (IND) - J54-9 (SEUC) Always Below 1 Ω
        J74-24 (IND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY OR INTEGRATION CONTROL AND PANEL - BODY GROUND)


    1. A015Z70E01

      w/ Navigation System:


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J50-10 (GND1) - Body ground Always Below 1 Ω
    2. A015ZLIE03

      w/o Navigation System:


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

        Standard Resistance
        Tester Connection Condition Specified Condition
        J54-8 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)