AUTOMATIC HIGH BEAM SYSTEM Automatic High Beam Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects combination switch assembly (automatic high beam main switch) signals.

The automatic high beam system can be turned on and off by operating the combination switch assembly (automatic high beam main switch).

WIRING DIAGRAM

B002IQ6E10

CAUTION / NOTICE / HINT

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS (AUTO HIGH BEAM MAIN SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the display on the GTS.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Auto High Beam Main Switch Combination switch assembly (automatic high beam main switch) signal ON or OFF

      ON: Combination switch assembly (automatic high beam main switch) pressed

      OFF: Combination switch assembly (automatic high beam main switch) not pressed

      		 -
      OK
      Normal conditions listed above are displayed.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. INSPECT COMBINATION SWITCH ASSEMBLY


    1. Remove the combination switch assembly.

      Click here

    2. Inspect the combination switch assembly.

      Click here

      OK
      Combination switch assembly is normal.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE COMBINATION SWITCH ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)


    1. Disconnect the I33 combination switch assembly connector.

    2. Disconnect the I47 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      I33-1 (+B) - I47-23 (AHBI) Always Below 1 Ω
      I33-1 (+B) - Body ground Always 10 kΩ or higher
      I33-10 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for LHD: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here
    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) for RHD;: REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR