AFS (ADAPTIVE FRONT-LIGHTING SYSTEM), Diagnostic DTC:B241A

DTC Code DTC Name
B241A Rear Height Control Sensor

DESCRIPTION

The AFS ECU (headlight swivel ECU assembly) receives signals indicating the height of the vehicle from the rear height control sensor sub-assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B241A

Rear Height Control Sensor

  • Malfunction in rear height control sensor sub-assembly

  • Open or short in rear height control sensor sub-assembly circuit

  • Rear height control sensor sub-assembly

  • Harness or connector

  • AFS ECU (headlight swivel ECU assembly)

WIRING DIAGRAM

E256783E03

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).

    Click here

  • If any of the following are performed, it is necessary to initialize the AFS ECU (headlight swivel ECU assembly).

    Click here

    • Replacement of the rear height control sensor sub-assembly

    • Removal/installation of the rear height control sensor sub-assembly

    • Work that changes the vehicle height such as replacement of suspension components

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs.

      Click here

      Body Electrical > AFS > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > AFS > Trouble Codes

      OK

      DTC B241A is not output.

    Result

    Proceed to

    OK

    NG
    OK

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    NG

  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

      Rr Height Sens Signal Val

      Rear height control sensor signal value

      0.00 to 5.00 V

      0.50 to 4.50 V

      Value changes according to vehicle height

      Body Electrical > AFS > Data List

      Tester Display

      Rr Height Sens Signal Val

      OK

      Normal condition listed above is displayed.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY)

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

    2. Disconnect the M1 rear height control sensor sub-assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A93-19 (SHRL) - M1-2 (SHRR)

      Always

      Below 1 Ω

      A93-19 (SHRL) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

    1. Remove the rear height control sensor sub-assembly.

      Click here

    2. Inspect the rear height control sensor sub-assembly.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    Click here

    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

    Click here