Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001KY89
Model Year Start: 2020 Model: Camry HV Prod Date Range: [09/2019 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): B241A; Rear Height Control Sensor; 2020 - 2024 MY Camry HV [09/2019 -        ]

DTC

B241A

Rear Height Control Sensor

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

Detection condition:

  • The power switch is on (IG).

Malfunction status:

  • Abnormal vehicle height continuously detected

Malfunction duration:

  • 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 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION

  • If any of the following are performed, it is necessary to initialize the headlight ECU sub-assembly LH.

    Click here 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): INITIALIZATION

    • 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

(a) Connect the Techstream to the DLC3.

(b) Turn the power 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 power 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 2020 MY Camry HV [09/2019 - 10/2020]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2021 MY Camry HV [10/2020 - 08/2021]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2022 - 2024 MY Camry HV [08/2021 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

NG

3.

INSPECT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH

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

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; LIGHTING (EXT): HEIGHT CONTROL SENSOR: REMOVAL

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

Click here 2018 - 2024 MY Camry HV [07/2017 -        ]; LIGHTING (EXT): HEIGHT CONTROL SENSOR: INSPECTION

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 A79 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

U1-3 (SHB) - A79-16 (SBR)

Always

Below 1 Ω

U1-2 (SHRR) - A79-17 (SHRL)

Always

Below 1 Ω

U1-1 (SHG) - A79-15 (SGR)

Always

Below 1 Ω

U1-3 (SHB) or A79-16 (SBR) - Body ground

Always

10 kΩ or higher

U1-2 (SHRR) or A79-17 (SHRL) - Body ground

Always

10 kΩ or higher
OK

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH 2018 - 2020 MY Camry HV [07/2017 - 10/2020]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL 2021 - 2024 MY Camry HV [10/2020 -        ]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR