LIGHTING SYSTEM, Diagnostic DTC:B241A

DTC Code DTC Name
B241A Rear Height Control Sensor

DESCRIPTION

w/o Intelligent Parking Assist System:

The headlight leveling ECU assembly receives signals indicating the height of the vehicle from the rear height control sensor sub-assembly.

DTC No. DTC Detecting Condition Trouble Area
B241A

  • Malfunction in rear height control sensor sub-assembly

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

  • Rear height control sensor sub-assembly

  • Harness or connector

  • Headlight leveling ECU assembly

w/ Intelligent Parking Assist System:

The headlight leveling ECU assembly receives signals regarding the height of the vehicle from the rear height control sensor sub-assembly via the parking assist ECU.

DTC No. DTC Detecting Condition Trouble Area
B241A

  • Malfunction in rear height control sensor sub-assembly

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

  • Intelligent parking assist system

  • Rear height control sensor sub-assembly

  • Harness or connector

  • Parking assist ECU

  • Headlight leveling ECU assembly

WIRING DIAGRAM

A005E93E02

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs Click here.

    2. Check for DTCs Click here.

      OK
      DTC B241A is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

  2. CHECK VEHICLE CONDITION


    1. Check the vehicle condition.

      Result
      Result Proceed to
      w/o Intelligent Parking Assist System A
      w/ Intelligent Parking Assist System B

    B

    CHECK FOR DTC (INTELLIGENT PARKING ASSIST SYSTEM) Click here

    A

  3. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL Auto Leveling / Data List.

    5. Read the display on the GTS.

      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 6.25 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 the vehicle is level) Value is changed according to vehicle height
      OK
      Normal conditions listed above are displayed.

    OK

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    NG

  4. INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY


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

      A005BPPE01

    2. Remove the rear height control sensor sub-assembly Click here.

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

    4. Measure the voltage between terminals 2 (SHRR) and 1 (SHG) while slowly moving the link up and down.

      Standard Voltage
      Tester Connection Condition Specified Condition
      2 (SHRR) - 1 (SHG) +45° (High) 3.6 to 4.4 V
      0° (Normal) 2.0 to 2.4 V
      -35° (Low) 0.8 to 1.0 V
      Text in Illustration
      *a

      Component without harness connected

      (Rear Height Control Sensor Sub-assembly)
      *b Low
      *c Standard position
      *d High

    NG

    REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY - HEIGHT CONTROL SENSOR)


    1. Disconnect the A48 headlight leveling ECU assembly connector.

    2. Disconnect the S25 rear height control sensor sub-assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A48-19 (SHRL) - S25-2 (SHRR) Always Below 1 Ω
      A48-19 (SHRL) - Body ground Always 10 kΩ or higher

    OK

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. CHECK FOR DTC (INTELLIGENT PARKING ASSIST SYSTEM)


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC "C1628 Height Control Sensor Circuit Malfunction" is not output. OK
      DTC "C1628 Height Control Sensor Circuit Malfunction" output. NG

    NG

    GO TO INTELLIGENT PARKING ASSIST SYSTEM Click here

    OK

  7. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / HL Auto Leveling / Data List.

    5. Read the display on the GTS.

      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 6.25 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 the vehicle is level) Value is changed according to vehicle height
      OK
      Normal conditions listed above are displayed.

    OK

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here

    NG

  8. CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - HEADLIGHT LEVELING ECU ASSEMBLY)


    1. Disconnect the A48 headlight leveling ECU assembly connector.

    2. Disconnect the L65 parking assist ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A48-19 (SHRL) - L65-8 (HO1) Always Below 1 Ω
      A48-19 (SHRL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK PARKING ASSIST ECU


    1. Replace the parking assist ECU with a new or known good one Click here.

    2. Check for DTCs Click here.

      OK
      DTC B241A is not output.

    OK

    END (PARKING ASSIST ECU WAS DEFECTIVE)

    NG

    REPLACE HEADLIGHT LEVELING ECU ASSEMBLY Click here