AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) AFS ECU Power Source Circuit

DTC Code DTC Name
AFS ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

E261804E02

CAUTION / NOTICE / HINT

Note:

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

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

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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 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

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    NG

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

    1. Disconnect the A93 AFS ECU (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 AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

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    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR