AFS (ADAPTIVE FRONT-LIGHTING SYSTEM) Back-up Light Circuit

DTC Code DTC Name
Back-up Light Circuit

DESCRIPTION

The AFS ECU (headlight swivel ECU assembly) detects the state of the back-up light.

WIRING DIAGRAM

E259635E01

CAUTION / NOTICE / HINT

Note:

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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Tip:

The following procedure is for vehicles equipped with a manual transaxle or multi-mode manual transaxle.

PROCEDURE

  1. CHECK OPERATION (BACK-UP LIGHT)

    1. Check the operation of the back-up light.

      OK

      The back-up light operates normally.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO LIGHTING SYSTEM (PROBLEM SYMPTOMS TABLE)

    Click hereClick here

    OK

  2. 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

      Traveling Direction

      Traveling Direction

      Not Fwd or Fwd

      Fwd: Shift lever not in R or N*1

      Not Fwd: Shift lever in R or N*1

      -

      • *1: for Multi-mode Manual Transaxle

      Body Electrical > AFS > Data List

      Tester Display

      Traveling Direction

      OK

      Normal condition listed above is displayed.

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    NG

  3. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY))

    1. for Multi-mode Manual Transaxle

      1. Disconnect the A102 back-up light switch assembly connector.

      2. Disconnect the A93 AFS ECU (headlight swivel ECU assembly) connector.

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

    2. for Manual Transaxle

      1. Disconnect the B38 back-up light switch assembly connector.

      2. Disconnect the A93 AFS ECU (headlight swivel ECU assembly) connector.

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

    Standard Resistance

    Tester Connection

    Condition

    Specified Condition

    A93-6 (RSW) - A102-1 (RL)

    Always

    Below 1 Ω

    A93-6 (RSW) - Body ground

    Always

    10 kΩ or higher

    Standard Resistance

    Tester Connection

    Condition

    Specified Condition

    A93-6 (RSW) - B38-1

    Always

    Below 1 Ω

    A93-6 (RSW) - Body ground

    Always

    10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR