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

A015ZY0E01

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. A0160RKE10
      Text in Illustration
      *1

      Component without harness connected

      (Multi-display Assembly)

      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 J138-10 (SEUC)

      Battery negative (-) → Terminal J138-13 (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.


    NG

    REPLACE MULTI-DISPLAY ASSEMBLY Click here

    OK

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


    1. Disconnect the J74 main body ECU RH connector and J138 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) - J138-10 (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. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      J138-13 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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