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.

The headlight ECU sub-assembly LH outputs DTC B2452.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2452 Height Control Sensor Data Out of Range When Initializing The vehicle height sensor value is out of range during initialization

  • Vehicle condition when initializing

  • Rear height control sensor sub-assembly LH

  • Headlight ECU sub-assembly LH

  • Harness or connector

WIRING DIAGRAM

B006MPYE86
*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


      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


      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. 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

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


    1. Disconnect the A28 headlight ECU sub-assembly LH connector.

    2. Disconnect the L4 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
      A28-16 (SBR) - L4-3 (SHB) Always Below 1 Ω
      A28-17 (SHRL) - L4-2 (SHRL) Always Below 1 Ω
      A28-15 (SGR) - L4-1 (SHG) Always Below 1 Ω
      A28-16 (SBR) - Body ground Always 10 kΩ or higher
      A28-17 (SHRL) - Body ground Always 10 kΩ or higher
      A28-15 (SGR) - 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