AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(except Sedan) ECU Power Source Circuit

DESCRIPTION

This circuit detects the state of the ignition switch, and sends it to the headlight swivel ECU assembly.

WIRING DIAGRAM

A01TAGWE04
*1 from IG1 NO. 1 Relay
*2 ECU-IG NO. 1
*3 ECU-IG NO. 3
*4 Headlight Swivel ECU Assembly

CAUTION / NOTICE / HINT

Note


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

  • If the headlight swivel ECU assembly has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight swivel ECU assembly.

    Click here

PROCEDURE


  1. READ VALUE 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 / AFS / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > AFS > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      +B IG power supply voltage value 0.00 to 19.75 V 11.00 to 14.00 V -

      Body Electrical > AFS > Data List
      Tester Display
      +B
      OK
      Normal condition listed above is displayed.
      Result
      Proceed to
      OK
      NG

    OK

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

    NG

  2. CHECK HARNESS AND CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. Disconnect the A93 headlight swivel ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A93-14 (IGS) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A93-15 (IG) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A93-22 (E1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR