DTC    B241A    Rear Height Control Sensor

for Preparation Click here


DESCRIPTION

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
  1. Malfunction in rear height control sensor sub-assembly
  2. Open or short in rear height control sensor sub-assembly circuit
  1. Rear height control sensor sub-assembly
  2. Harness or connector
  3. Headlight leveling ECU assembly

WIRING DIAGRAM


E223762E01


INSPECTION PROCEDURE

NOTICE:
If either of the following work has been performed, initialization of the headlight leveling ECU assembly is necessary (Click here).
  1. Replacement of the headlight leveling ECU assembly.
  2. Replacement or removal/installation of the rear height control sensor sub-assembly or work that changes the vehicle height such as replacement of suspension components.

1.CHECK FOR DTC

  1. Clear the DTCs (Click here).

  1. Check for DTCs (Click here).

    OK:
    DTC B241A is not output.



NG
Go to step 2
OK

USE SIMULATION METHOD TO CHECK (Click here)  

2.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Read the display on the intelligent tester.

    HL Auto Leveling 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Height Sens Pw Supply Val
    		Height control sensor power supply value/0 to 6.25 V
    		Approx. 5 V
    		-
    Rr Height Sens Signal Val
    		Rear height control sensor signal value/0 to 5 V
    		Approx. 2.5 V (When vehicle is level)
    		Value changes according to vehicle height

    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


3.INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY


    E223780E01

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

  1. Remove the rear height control sensor sub-assembly (Click here).

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

  1. 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)
    		4.05 V
    0° (Normal)
    		2.25 V
    -45° (Low)
    		0.45 V

    Text in Illustration 
    *a
    		Component without harness connected
    (Rear Height Control Sensor Sub-assembly)



NG
REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY (Click here)
OK


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

  1. Disconnect the A46 headlight leveling ECU assembly connector.

  1. Disconnect the R2 rear height control sensor sub-assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A46-19 (SHRL) - R2-2 (SHRR)
    		Always
    		Below 1 Ω
    A46-19 (SHRL) - Body ground
    		Always
    		10 kΩ or higher

    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

REPAIR OR REPLACE HARNESS OR CONNECTOR