AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B241A

DTC Code DTC Name
B241A Rear Height Control Sensor

DESCRIPTION

This DTC is stored when the headlight control computer assembly LH detects a malfunction in the rear height control sensor sub-assembly LH power source circuit or rear height control sensor sub-assembly LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area
B241A Rear Height Control Sensor

  • Malfunction in rear height control sensor sub-assembly LH

  • Open or short in rear height control sensor sub-assembly LH circuit

  • Rear height control sensor sub-assembly LH

  • Headlight control computer assembly LH

  • Harness or connector
DTC Detection Conditions:
Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition - - -
Malfunction Status Malfunction in rear height control sensor sub-assembly LH ○ -
Open or short in rear height control sensor sub-assembly LH power source circuit - ○
Detection Time - -
Number of Trips 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

B002ED4E56
*a Rear Height Control Sensor Sub-assembly LH
*b Headlight Control Computer Assembly LH

CAUTION / NOTICE / HINT

Note


  • Before performing this inspection, check that the rear height control sensor sub-assembly LH is installed correctly.

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

    Click here

  • If any of the following are performed, it is necessary to initialize the headlight control computer 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. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > AFS > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Turn the engine switch on (IG).

    2. Clear the DTCs.

      Click here


      Body Electrical > AFS > Trouble Codes
      OK
      DTC B241A are not output.
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  3. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / AFS / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > AFS > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Height Sens Pw Supply Val Height control sensor power supply value 0.00 to 6.25 V 4.61 to 5.00 V -
      Rr Height Sens Signal Val Rear height control sensor signal value 0.00 to 5.00 V 0.50 to 4.50 V Value changes according to vehicle height

      Body Electrical > AFS > Data List
      Tester Display
      Height Sens Pw Supply Val
      Rr Height Sens Signal Val
      OK
      Normal condition listed above is displayed.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY LH Click here

    NG

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


    1. Disconnect the A29 headlight control computer assembly LH connector.

    2. Disconnect the k1 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
      A29-16 (SBR) - k1-3 Always Below 1 Ω
      A29-17 (SHRL) - k1-2 Always Below 1 Ω
      A29-15 (SGR) - k1-1 Always Below 1 Ω
      A29-16 (SBR) - Body ground Always 10 kΩ or higher
      A29-17 (SHRL) - Body ground Always 10 kΩ or higher
      A29-15 (SGR) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    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

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

    OK

    REPLACE HEADLIGHT CONTROL COMPUTER ASSEMBLY LH Click here

    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH Click here