Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2017 >> RC 350 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Automatic Headlight Beam Level Control System - Diagnostic Codes & Circuit Tests) >> Automatic Headlight Beam Level Control System >> DTC B2452: Abnormal Height Sensor Data at Initialization [10/2018 - ] >> Procedure

DTC B2452: Abnormal Height Sensor Data at Initialization [10/2018 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2024 Lexus RC 350, 2024 Lexus RC 300, 2023 Lexus RC 350, 2023 Lexus RC 300, and 2022 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream 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

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream 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

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 11/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2019 - 09/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2020 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

    Result: 

    NG 

    See step  3

  3. 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

    Result: 

    NG 

    INSTALL PARTS CORRECTLY. Refer to  INSTALLATION [10/2018 - ] 

    Result: 

    OK 

    See step  4

  4. REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH 
    1. Remove the rear height control sensor sub-assembly LH.

      Refer to REMOVAL [09/2014 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  5

  5. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream 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

    Result: 

    NEXT 

    See step  6

  6. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream 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

    Result: 

    OK 

    END (INITIALIZATION WAS NOT COMPLETED) 

    Result: 

    NG 

    REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2018 - ] 

scientia non olet · About Mike's Workshop Manuals