LIGHTING SYSTEM Taillight Circuit

DESCRIPTION

The main body ECU receives a light control switch information signal from the headlight dimmer switch, and illuminates the taillights.

WIRING DIAGRAM

A0158IAE03
A0158JEE02

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (TAILLIGHT RELAY)


    1. Operate the intelligent tester according to the steps on the display and select "Active Test".

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Taillight Relay Taillight ON or OFF -
      OK
      Taillight turns on/turns off.

    NG

    INSPECT FUSE (TAIL FUSE) Click here

    OK

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

  2. INSPECT FUSE (TAIL FUSE)


    1. Remove the TAIL fuse from the main body ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      TAIL fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY)


    1. A015DGJE01

      Disconnect the 2A ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      2A-1 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK VEHICLE TYPE


    1. Check the vehicle type.

      Result
      Result Proceed to
      for Double Swing Out Type A
      except Double Swing Out Type B

    B

    CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - MAIN BODY ECU AND BODY GROUND) Click here

    A

  5. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the 2C ECU connector.

      A015D8UE03

    2. for LH:


      1. Disconnect the n1 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - n1-5 (TL) Always Below 1 Ω
        n1-4 (E) - Body ground
        n1-5 (TL) - Body ground Always 10 kΩ or higher

    3. for RH:


      1. Disconnect the Y1 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - Y1-5 (TL) Always Below 1 Ω
        Y1-6 (E) - Body ground
        Y1-5 (TL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU

  6. CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the 2C ECU connector.

      A0157HEE03

    2. for LH:


      1. Disconnect the K4 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - K4-6 (TL) Always Below 1 Ω
        K4-3 (E) - Body ground
        K4-6 (TL) - Body ground Always 10 kΩ or higher

    3. for RH:


      1. Disconnect the L3 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - L3-6 (TL) Always Below 1 Ω
        L3-3 (E) - Body ground
        L3-6 (TL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR LIGHT - MAIN BODY ECU AND BODY GROUND)


    1. Disconnect the 2C ECU connector.

      A015BGPE02

    2. for LH:


      1. Disconnect the S11 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - S11-3 Always Below 1 Ω
        S11-1 - Body ground
        S11-3 - Body ground Always 10 kΩ or higher

    3. for RH:


      1. Disconnect the S12 light connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        2C-22 - S12-3 Always Below 1 Ω
        S12-1 - Body ground
        S12-3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU