AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM 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.

WIRING DIAGRAM

E227418E04

CAUTION / NOTICE / HINT

Note:

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

Tip:

After replacing the headlight leveling ECU, initialization of the ECU is necessary.

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PROCEDURE

  1. READ VALUE USING GTS (IGNITION POWER SUPPLY)

    1. Using the GTS, read the Data List.

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      Body Electrical > HL AutoLeveling > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      +B

      Ignition power supply voltage value

      0 to 19.75 V

      11 to 14 V

      -

      Body Electrical > HL AutoLeveling > Data List

      Tester Display

      +B

      OK

      The display is as specified in the normal condition column.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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    NG

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

    1. E136327C01

      *a

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)

      Disconnect the headlight leveling ECU connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A67-1 (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

      A67-9 (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