AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM(for Sedan), Diagnostic DTC:B241A

DTC Code DTC Name
B241A Rear Height Control Sensor

DESCRIPTION

The headlight leveling 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

  • Headlight leveling ECU assembly

WIRING DIAGRAM

E256783E36

CAUTION / NOTICE / HINT

Note:

If either of the following is performed, initialization of the headlight leveling ECU assembly is necessary.

Click here

  • Replacement of the headlight leveling ECU assembly.

  • Replacement or removal/installation of the rear height control sensor sub-assembly or 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 > HL AutoLeveling > Clear DTCs

    2. Check for DTCs.

      Click here

      Body Electrical > HL AutoLeveling > 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 / 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

      Rr Height Sens Signal Val

      Rear height control sensor sub-assembly signal

      0.00 to 5.00 V

      Approx. 2.50 V (When vehicle is level)

      Value changes according to vehicle height

      Body Electrical > HL AutoLeveling > Data List

      Tester Display

      Rr Height Sens Signal Val

      OK

      Normal conditions listed above are displayed.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY

    Click here

    NG

  3. 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
    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY

    Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY)

    1. Disconnect the A182 headlight leveling ECU assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A182-19 (SHRL) - M1-2 (SHRR)

      Always

      Below 1 Ω

      A182-19 (SHRL) or M1-2 (SHRR) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE HEADLAMP LEVELING ECU ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR