LIGHTING SYSTEM, Diagnostic DTC:B2416, B241A

DTC Code DTC Name
B2416 Height Control Sensor Malfunction
B241A Rear Height Control Sensor

DESCRIPTION

The headlight leveling ECU receives signals indicating the height of the vehicle from the height control sensor.

DTC Code DTC Detection Condition Trouble Area
B2416

Either condition is met:


  • Malfunction in the height control sensor.

  • Open or short in the height control sensor circuit.

  • Rear height control sensor sub-assembly

  • Harness or connector

  • Headlight leveling ECU assembly
B241A

WIRING DIAGRAM

A01ITL9E01

INSPECTION PROCEDURE

Tech Tips

After replacing the headlight leveling ECU, initialization of the ECU is necessary Click here.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Using the intelligent tester, read the Data List Click here.

      HL Auto Leveling
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Height Sens Pw Supply Val Rear height control sensor power supply value / 0 to 5 V Approximately 5.0 V -
      Rr Height Sens Signal Val Rear height control sensor signal value / 0 to 5 V Approximately 2.5 V (When vehicle level) The value becomes larger when the front of the vehicle tilts up.
      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    A

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


    1. A01IQQUE07
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Headlight Leveling ECU Assembly)
      *2

      Front view of wire harness connector

      (to Rear Height Control Sensor Sub-assembly)

      Disconnect the A49 headlight leveling ECU connector.

    2. Disconnect the P1 height control sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A49-12 (SBR) - P1-3 (SHB) Always Below 1 Ω
      A49-19 (SHRL) - P1-2 (SHRR) Always Below 1 Ω
      A49-21 (SGR) - P1-1 (SHG) Always Below 1 Ω
      A49-12 (SBR) - Body ground Always 10 kΩ or higher
      A49-19 (SHRL) - Body ground Always 10 kΩ or higher
      A49-21 (SGR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HEADLIGHT LEVELING ECU ASSEMBLY


    1. A01IPB0E04
      Text in Illustration
      *1

      Component with harness connected

      (Headlight Leveling ECU Assembly)

      Reconnect the A49 headlight leveling ECU connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A49-12 (SBR) - A49-21 (SGR) Ignition switch ON 4.75 to 5.25 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    A

  4. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY


    1. Remove the height control sensor Click here.

      A01IUG5E05
      Text in Illustration
      *1 Min. Low *2 Normal
      *3 Max. High *4 45°
      *5

      Component without harness connected

      (Rear Height Control Sensor Sub-assembly)

      		 - -

    2. Connect 3 dry cell batteries (1.5 V) in series.

    3. Connect the positive (+) lead from the batteries to terminal 3, and the negative (-) lead from the batteries to terminal 1.

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      2 (SHRR) - 1 (SHG) Max. high Approximately 4.5 V
      Normal Approximately 2.5 V
      Min. low Approximately 0.5 V
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    C

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY Click here

    A

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here