LIGHTING SYSTEM Headlight Solenoid Circuit

DESCRIPTION

When the main body ECU receives a high beam turn on signal, the main body ECU activates the bi-function by controlling the BI-XENON relay. The bi-function increases the upper illumination area of the discharge bulb (low beam) by moving a shade using a solenoid built into the headlight unit.

WIRING DIAGRAM

A01EJ8SE02

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. CHECK OPERATION (LOW BEAM HEADLIGHTS)


    1. Check the operation of the low beam headlights.

      OK
      Low beam headlights operate normally.

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  2. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Check that the high beam headlights illuminate.

      Main Body
      Tester Display Test Part Control Range Diagnostic Note
      Head Light Hi High beam headlight relay ON/OFF -
      OK
      High beam headlights illuminate.

    NG

    INSPECT BI-XENON RELAY (BI-XENON) Click here

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

  3. INSPECT BI-XENON RELAY (BI-XENON)


    1. A01EKB7E01

      Remove the BI-XENON relay from the power distributor (engine room junction block assembly).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 - 5 Battery voltage applied to terminals 1 and 2 Below 1 Ω
      3 - 5 Battery voltage not applied between terminals 10 kΩ or higher

    NG

    REPLACE BI-XENON RELAY

    OK

  4. CHECK HARNESS AND CONNECTOR (BATTERY - BI-XENON RELAY)


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

      Standard Voltage
      Tester Connection Condition Specified Condition
      Relay terminal 2 - Body ground Always 11 to 14 V
      Relay terminal 5 - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - HEADLIGHT ASSEMBLY)


    1. Disconnect the A53 headlight assembly LH connector.

    2. Disconnect the A52 headlight assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay terminal 3 - A53-4 Always Below 1 Ω
      Relay terminal 3 - A52-4 Always Below 1 Ω
      Relay terminal 3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (BI-XENON RELAY - DRIVER SIDE JUNCTION BLOCK)


    1. Disconnect the 2C main body ECU (driver side junction block assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Relay terminal 1 - 2C-23 Always Below 1 Ω
      2C-23 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) Click here