LIGHTING SYSTEM Headlight Solenoid Circuit

DESCRIPTION

This Bi-function is activated by the front controller. The front controller receives a HI beam turn ON signal from the main body ECU RH and activates the headlight solenoid built into the headlight unit to slide the shade down.

When the LO beam headlight is switched on, the upper illumination area of the discharge bulb is blocked by the shade and only the lower illumination area is used. When the HI beam is turned on, the headlight solenoid slides the shade down to allow use of the upper illumination area, thus increasing the illumination area and improving visibility when the HI beam is on.

A0161C7E01

WIRING DIAGRAM

A0161UBE01

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 on.

    4. Enter the following menus: Body / Body No. 5 / Active Test.

    5. Check the operation.

      Body No. 5 (Front Controller)
      Tester Display Test Part Control Range Diagnostic Note
      Light Head (High) Headlight (high) operation ON/OFF -
      OK
      Headlight (HI) comes on.

    NG

    CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - FRONT CONTROLLER) Click here

    OK

    REPLACE HEADLIGHT ASSEMBLY Click here

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - FRONT CONTROLLER)


    1. A015YZEE19

      Disconnect the B2 or B12 headlight assembly connector.

    2. Turn the light control switch to HEAD position.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      B2-4 (B) - Body ground Light control switch in HEAD 11 to 14 V
      B12-4 (B) - Body ground Light control switch in HEAD 11 to 14 V

    NG

    CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY - BODY GROUND)


    1. A015YZEE20

      Disconnect the B2 or B12 headlight assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B2-3 (E) - Body ground Always Below 1 Ω
      B12-3 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE HEADLIGHT ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (FRONT CONTROLLER - HEADLIGHT ASSEMBLY)


    1. A015ZDYE05

      Disconnect the 2G front controller connector.

    2. Disconnect the B2 or B12 headlight assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2G-4 - B2-4 (B) Always Below 1 Ω
      2G-4 - B12-4 (B) Always Below 1 Ω
      2G-4 or B2-4 (B) - Body ground Always 10 kΩ or higher
      2G-4 or B12-4 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT CONTROLLER (MULTIPLEX NETWORK BODY ECU)