AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(for Sedan) Headlight Leveling ECU Power Source Circuit

DTC Code DTC Name
Headlight Leveling ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

E223770E31

CAUTION / NOTICE / HINT

Note:

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

  • Make sure to perform vehicle information synchronization and initialization after replacing the headlight leveling 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 / HL AutoLeveling / Data List.

    5. Read the Data List according to 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 (POWER SOURCE - HEADLIGHT LEVELING ECU ASSEMBLY)

    1. Disconnect the A182 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

      A182-1 (IG) - Body ground

      Ignition switch off

      Below 1 V

      A182-1 (IG) - Body ground

      Ignition switch ON

      11 to 14 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

      A182-9 (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