AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B2452

DTC Code DTC Name
B2452 Height Control Sensor Data Out of Range When Initializing

DESCRIPTION

This DTC is output when the sensor value acquired from the rear height control sensor sub-assembly LH is out of range during initialization of the headlight ECU sub-assembly LH. For example, when the vehicle is tilted or jacked up.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2452 Height Control Sensor Data Out of Range When Initializing

    Detection condition:

  • Engine switch on (IG)


    Malfunction status:

  • The vehicle height sensor value is out of range during initialization.


    Malfunction duration:

  • -

  • Vehicle condition when initializing

  • Rear height control sensor sub-assembly LH

  • Harness or connector

  • Headlight ECU sub-assembly LH

 -

WIRING DIAGRAM

B0059G5E12
*a Rear Height Control Sensor Sub-assembly LH
*b Headlight ECU Sub-assembly LH

CAUTION / NOTICE / HINT

Note


  • After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

    Click here

  • After the rear height control sensor sub-assembly LH is replaced or removed and installed, initialization is necessary.

    Click here

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. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      1. for Triple Beam Headlight:


        Body Electrical > AFS > Clear DTCs

      2. for Single Beam Headlight:


        Body Electrical > HL AutoLeveling > Clear DTCs

    2. Turn the engine switch on (IG) and wait for at least 10 seconds.

    3. Check for DTCs.

      Click here


      1. for Triple Beam Headlight:


        Body Electrical > AFS > Trouble Codes

      2. for Single Beam Headlight:


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

    OK

    END (NORMAL AFTER VEHICLE INFORMATION REGISTERED)

    NG

  3. CHECK REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH


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

      OK
      Rear height control sensor sub-assembly LH installation condition is normal.
      Result
      Proceed to
      OK
      NG

    NG

    INSTALL PARTS CORRECTLY Click here

    OK

  4. 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

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


    1. Disconnect the A19 headlight ECU sub-assembly LH connector.

    2. Disconnect the R1 rear height control sensor sub-assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A19-16 (SBR) - R1-3 (SHB) Always Below 1 Ω
      A19-17 (SHRL) - R1-2 (SHRR) Always Below 1 Ω
      A19-15 (SGR) - R1-1 (SHG) Always Below 1 Ω
      A19-16 (SBR) - Body ground Always 10 kΩ or higher
      A19-17 (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