LIGHTING SYSTEM(w/ Automatic Headlight Beam Level Control System), Diagnostic DTC:B2452

DTC Code DTC Name
B2452 Abnormal Height Sensor Data at Initialization

DESCRIPTION

The headlight ECU sub-assembly LH stores this DTC if the value from the rear height control sensor sub-assembly LH is out of range when performing initialization of the headlight ECU sub-assembly LH, such as when the vehicle is not level or jacked up.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B2452 Abnormal Height Sensor Data at Initialization

    Detection condition:

  • The ignition switch is ON.


    Malfunction status:

  • Abnormal rear height control sensor sub-assembly value detected during initialization


    Malfunction duration:

  • -

  • Vehicle condition when initializing

  • Rear height control sensor sub-assembly LH

  • Harness or connector

  • Headlight ECU sub-assembly LH

 Headlight ECU sub-assembly LH

WIRING DIAGRAM

B00714ME03
*a Rear Height Control Sensor Sub-assembly LH
*b Headlight ECU Sub-assembly LH

CAUTION / NOTICE / HINT

Note


  • If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

    Click here

  • If any of the following are performed, it is necessary to initialize the headlight ECU sub-assembly LH.

    Click here


    • Replacement of the rear height control sensor sub-assembly LH

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

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

PROCEDURE


  1. INITIALIZATION HEADLIGHT ECU SUB-ASSEMBLY LH


    1. Perform initialization of the headlight ECU sub-assembly LH.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  2. CLEAR DTC


    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 / Trouble Codes.

    5. Clear the DTCs.


      Body Electrical > HL AutoLeveling > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK FOR DTC


    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 / Trouble Codes.

    5. Check for DTCs.


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTC B2452 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (INITIALIZATION WAS NOT COMPLETED)

    NG

  4. CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH


    1. Check the installation condition of the rear height control sensor sub-assembly LH.

      OK
      Rear height control sensor sub-assembly LH is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    INSTALL PARTS CORRECTLY Click here

    OK

  5. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here

    OK

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


    1. Disconnect the A10 headlight ECU sub-assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U1-3 (SHB) - A10-16 (SBR) Always Below 1 Ω
      U1-2 (SHRR) - A10-17 (SHRL) Always Below 1 Ω
      U1-1 (SHG) - A10-15 (SGR) Always Below 1 Ω
      U1-3 (SHB) or A10-16 (SBR) - Body ground Always 10 kΩ or higher
      U1-2 (SHRR) or A10-17 (SHRL) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR