THEFT DETERRENT SYSTEM (w/ Smart Entry and Start System) Security Indicator Light Circuit

DESCRIPTION

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

The certification ECU (smart key ECU assembly) causes the security indicator light to come on or blink only during the arming preparation and alarm sounding states.

WIRING DIAGRAM

A017C20E06

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 intelligent tester main switch on.

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

      Entry&Start:
      Tester Display Test Part Control Range Diagnostic Note
      Security Indicator Security indicator light ON / OFF -
      OK
      The security indicator light blinks or goes off correctly when operating it through the intelligent tester.

    NG

    CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - CERTIFICATION ECU) Click here

    OK

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

  2. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - CERTIFICATION ECU)


    1. A017DMRE03

      Disconnect the D36 ECU connector.

    2. Disconnect the E13 connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D36-2 (IND) - E13-2 (LP) Always Below 1 Ω
      D36-2 (IND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (SECURITY INDICATOR LIGHT - BODY GROUND)


    1. A017C4QE09

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E13-5 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT SECURITY INDICATOR LIGHT


    1. A017DWCE04

      Reconnect the E13 connector with the D36 ECU connector still disconnected.

    2. Apply battery voltage from the wire harness back side between the specified terminals of the indicator, and check the lighting condition of the security indicator light.

      Standard
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal E13-2 (IND+)

      Battery negative (-) → Terminal E13-5 (E)

      		 Security indicator light comes on

      Note


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

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

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


    NG

    REPLACE SECURITY INDICATOR LIGHT Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)