AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM Headlight Leveling ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

A011MM8E12
*a from IG1 NO. 3 Relay
*b ECU-IG NO. 1
*c Headlight Leveling ECU Assembly

CAUTION / NOTICE / HINT

Note

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

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 / HL AutoLeveling / Data List.

    5. Read the display on the GTS.


      Body Electrical > HL AutoLeveling > 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 > HL AutoLeveling > 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 (AUXILIARY BATTERY - HEADLIGHT LEVELING ECU ASSEMBLY)


    1. A011MIPC03
      *a

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

      Disconnect the A65 headlight leveling ECU assembly connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A65-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      A65-1 (IG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A65-9 (E1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR