AUTOMATIC HIGH BEAM SYSTEM Automatic High Beam Switch Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) detects automatic high beam main switch (No. 2 combination switch assembly) signals. The automatic high beam system can be turned on and off by operating the integration control and panel assembly (automatic high beam switch).

WIRING DIAGRAM

B004QSJE17
*1 AHBI
*2 Automatic High Beam Main Switch (No. 2 Combination Switch Assembly)
*3 Main Body ECU (Multiplex Network Body ECU)

CAUTION / NOTICE / HINT

Note

Before replacing the main body ECU (multiplex network body ECU), refer to refer to Service Bulletin.

PROCEDURE


  1. READ VALUE USING GTS


    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 Data List according to 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 Automatic high beam main switch (No. 2 combination switch assembly) signal ON or OFF

      ON: Automatic high beam main switch (No. 2 combination switch assembly) pressed

      OFF: Automatic high beam main switch (No. 2 combination switch assembly) not pressed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      Auto High Beam Main Switch
      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 AUTOMATIC HIGH BEAM SWITCH (NO. 2 COMBINATION SWITCH ASSEMBLY)


    1. Remove the automatic high beam main switch (No. 2 combination switch assembly).

      Click here

    2. Inspect the automatic high beam main switch (No. 2 combination switch assembly).

      Click here

      OK
      Automatic high beam main switch (No. 2 combination switch assembly) is normal.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE AUTOMATIC HIGH BEAM MAIN SWITCH (NO. 2 COMBINATION SWITCH ASSEMBLY) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (NO. 2 COMBINATION SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)


    1. Disconnect the F17 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F49-9 (+B) - F17-17 (AHBI) Always Below 1 Ω
      F49-9 (+B) or F17-17 (AHBI) - Body ground Always 10 kΩ or higher
      F49-8 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR