THEFT DETERRENT SYSTEM Ignition Switch Circuit

DESCRIPTION

The body ECU determines the ignition switch position (LOCK, ACC, ON) based on signals from the IG or ACC circuit.

WIRING DIAGRAM

B003J8AE03

CAUTION / NOTICE / HINT

Note


  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • w/ Automatic Light Control System:

    If the body ECU has been replaced, it is necessary to initialize the body ECU.

    Click here

  • w/ Door Control Battery:

    As the door control battery is installed between the vehicle battery and body ECU, first perform the inspections to confirm that there are no malfunctions in the power source circuit for the body ECU before performing this troubleshooting procedure.

PROCEDURE


  1. INSPECT IGNITION OR STARTER SWITCH ASSEMBLY


    1. Remove the ignition or starter switch assembly.


    2. Inspect the ignition or starter switch assembly.


      Result
      Proceed to
      OK
      NG (for 2TR-FE)
      NG (for 1GR-FE)
      NG (for 1GD-FTV)
      NG (for 2GD-FTV)
      NG (for 1KD-FTV)
      NG (for 2KD-FTV)
      NG (for 5L-E)

    NG (for 2TR-FE)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 1GR-FE)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 1GD-FTV)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 2GD-FTV)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 1KD-FTV)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 2KD-FTV)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    NG (for 5L-E)

    REPLACE IGNITION OR STARTER SWITCH ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (BATTERY - IGNITION OR STARTER SWITCH ASSEMBLY)


    1. Disconnect the ignition or starter switch assembly connector.

    2. B003M3HC04
      *a

      Front view of wire harness connector

      (to Ignition or Starter Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G135-5 (AM1) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (BODY ECU - IGNITION OR STARTER SWITCH ASSEMBLY AND BODY GROUND)


    1. Remove the body ECU.


    2. Connect the 2D, 2E and 2J instrument panel junction block assembly connectors.

    3. Disconnect the G135 ignition or starter switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G135-8 (IG1) - A-7 (IG) Always Below 1 Ω
      G135-8 (IG1) - Body ground Always 10 kΩ or higher
      A-1 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BODY ECU for LHD: Click here for RHD: Click here

    NG

  4. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - IGNITION OR STARTER SWITCH ASSEMBLY AND BODY GROUND)


    1. Disconnect the 2D, 2E and 2J instrument panel junction block assembly connectors.

    2. Disconnect the G135 ignition or starter switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G135-8 (IG1) - 2E-1 Always Below 1 Ω
      2D-7 - 2D-5 Always Below 1 Ω
      G135-8 (IG1) - Body ground Always 10 kΩ or higher
      2D-7 - Body ground Always 10 kΩ or higher
      2J-5 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY for LHD: Click here for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR