Lexus ES manuals

Lexus ES: Rear Height Control Sensor (B241A)

DESCRIPTION

The headlight ECU sub-assembly LH determines the vehicle height and performs automatic headlight beam level control based on signals from the rear height control sensor sub-assembly LH via direct line.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B241A

Rear Height Control Sensor

  • The engine switch is on (IG).
  • Abnormal vehicle height continuously detected
  • 10 seconds or more
  • Rear height control sensor sub-assembly LH
  • Harness or connector
  • Headlight ECU sub-assembly LH

AFS

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • If any of the following are performed, it is necessary to initialize the headlight ECU sub-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
  • When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Wait 10 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / AFS / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS > Trouble Codes

OK:

DTC B241A is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

(a) Remove the rear height control sensor sub-assembly LH.

Click here

(b) Inspect the rear height control sensor sub-assembly LH.

Click here

NG

REPLACE REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

OK

4.

CHECK HARNESS AND CONNECTOR (REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY LH)

(a) Disconnect the A78 headlight ECU sub-assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

O3-3 (SHB) - A78-16 (SBR)

Always

Below 1 Ω

O3-2 (SHRR) - A78-17 (SHRL)

Always

Below 1 Ω

O3-1 (SHG) - A78-15 (SGR)

Always

Below 1 Ω

O3-3 (SHB) or A78-16 (SBR) - Body ground

Always

10 kΩ or higher

O3-2 (SHRR) or A78-17 (SHRL) - Body ground

Always

10 kΩ or higher

OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ NEXT:

 Headlight Beam Level Control Motor LH Lost Communication (B2424,B2425)

DESCRIPTION Each headlight ECU sub-assembly and headlight leveling motor communicate via LIN communication. The headlight leveling motor operates according to power supplied and automatic headlight be

 Right Headlight ECU Malfunction (B242C,B242D)

DESCRIPTION The headlight ECU sub-assembly LH or headlight ECU sub-assembly RH stores a DTC if it detects an internal malfunction. for LED Type Turn Signal Light DTC No. Detection Item DTC Dete

 Open in IG Circuit (B242E)

DESCRIPTION The headlight ECU sub-assembly operates using the power source voltage input from the IG terminal and ECUB terminal. The IG terminal power source voltage is supplied by turning the IG1-NO.

SEE MORE:

 AWD Warning does not Come ON

DESCRIPTION Refer to "4WD Warning Remains ON". Click here WIRING DIAGRAM Refer to "4WD Warning Remains ON". Click here CAUTION / NOTICE / HINT Refer to "4WD Warning Remains ON". Click here PROCEDURE 1. CHECK HARNESS AND CONNECTOR (a) Check that there is no looseness at the locking and

 Right Rear Wheel Speed Sensor Circuit Short to Ground or Open (C051214)

DESCRIPTION Refer to DTC C051212 Click here DTC No. Detection Item DTC Detection Condition Trouble Area C051214 Right Rear Wheel Speed Sensor Circuit Short to Ground or Open A short or open circuit is detected in the speed sensor signal circuit for 0.12 seconds or more. Rear

© 2016-2024 Copyright www.lexguide.net