THEFT DETERRENT SYSTEM Ignition Switch Circuit

DESCRIPTION

When the ignition switch is turned ON, voltage is applied to terminal IG of the theft warning ECU.

WIRING DIAGRAM

A01J72YE02

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (ECU-IG & GAUGE)


    1. Remove the ECU-IG & GAUGE fuse from the instrument panel junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. INSPECT IGNITION SWITCH ASSEMBLY

    A01J65GE01

    1. Disconnect the I8 switch connector

    2. Measure the resistance of the ignition switch.

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      1 (IG1) - 4 (AM1) OFF, ACC 10 kΩ or higher
      1 (IG1) - 4 (AM1) ON, START Below 1 Ω

    NG

    REPLACE IGNITION SWITCH ASSEMBLY

    OK

  3. CHECK WIRE HARNESS (THEFT WARNING ECU - BATTERY AND BODY GROUND)

    A01J6VLE03

    1. Disconnect the T16 ECU connector.

    2. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      T16-18 (IG) - Body ground Ignition switch OFF Below 1 V
      T16-18 (IG) - Body ground Ignition switch ON 10 to 14 V

    3. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      T16-1 (E) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE