AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B241A

DTC Code DTC Name
B241A Rear Height Control Sensor

DESCRIPTION

The headlight ECU sub-assembly LH receives vehicle height signals from the suspension control ECU. The headlight ECU sub-assembly LH outputs DTC B241A.

DTC Code DTC Detection Condition Trouble Area
B241A Malfunction in suspension control ECU

  • Active height control suspension

  • Headlight ECU sub-assembly LH

WIRING DIAGRAM

B0018NNE04
*1 Headlight ECU Sub-assembly
*2 Suspension Control ECU
*3 CAN Communication Line

CAUTION / NOTICE / HINT

Note


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

  • First perform the communication function inspections in How to Proceed with Troubleshooting to confirm that there are no CAN communication malfunctions before troubleshooting this DTC Click here.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Check for DTCs Click here.

      OK
      DTC B241A is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. CHECK DTC (ACTIVE HEIGHT CONTROL SUSPENSION)


    1. Turn the engine switch on (IG).

    2. Check for DTCs Click here.

      OK
      Active height control suspension DTCs are not output.

    OK

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

    NG

    GO TO ACTIVE HEIGHT CONTROL SUSPENSION Click here