Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001KY84
Model Year Start: 2020 Model: Camry HV Prod Date Range: [09/2019 -           ]
Title: LIGHTING (EXT): LIGHTING SYSTEM (w/ AFS): B2424,B2425; Headlight Beam Level Control Motor LH Lost Communication; 2020 - 2024 MY Camry HV [09/2019 -        ]

DTC

B2424

Headlight Beam Level Control Motor LH Lost Communication

DTC

B2425

Headlight Beam Level Control Motor RH Lost Communication

DESCRIPTION

Each headlight ECU sub-assembly and headlight swivel and leveling motor communicate via LIN communication.

The headlight swivel and leveling motor operates according to power supplied and automatic headlight beam level control signals from its respective headlight ECU sub-assembly and sends its operating state to the headlight ECU sub-assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B2424

Headlight Beam Level Control Motor LH Lost Communication

Detection condition:

  • The power switch is on (IG).

Malfunction status:

  • LIN communication error

Malfunction duration:

  • 10 seconds or more
  • Headlight assembly LH
  • Headlight assembly RH
  • Harness or connector
  • Headlight ECU sub-assembly LH
  • Headlight ECU sub-assembly RH

AFS

B2425

Headlight Beam Level Control Motor RH Lost Communication

Detection condition:

  • The power switch is on (IG).

Malfunction status:

  • LIN communication error

Malfunction duration:

  • 10 seconds or more
  • Headlight assembly RH
  • Headlight assembly LH
  • Harness or connector
  • Headlight ECU sub-assembly RH
  • 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 the headlight 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

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 B2424 and B2425 are not output.

Result

Proceed to

OK

A

NG (DTC B2424 is output)

B

NG (DTC B2425 is output)

C

NG (DTC B2424 and B2425 are output)

D
A

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

C

GO TO STEP 6

D

GO TO STEP 9

B

3.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Replace the headlight ECU sub-assembly LH with a new or known good one.

Click here 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

NEXT

4.

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

5.

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 B2424 is not output.

OK

END (HEADLIGHT ECU SUB-ASSEMBLY LH WAS DEFECTIVE)
NG

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

6.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY RH)

(a) Disconnect the A79 headlight ECU sub-assembly LH connector.

(b) Disconnect the A80 headlight ECU sub-assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A79-20 (LINL) - A80-20 (LINL)

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH (LINL TERMINAL SIGNAL OUTPUT)

*a

Front view of wire harness connector

(to Headlight ECU Sub-assembly RH)

(a) Connect the A79 headlight ECU sub-assembly LH connector.

(b) Using a Techstream, check the waveform.

OK:

Tester Connection

Condition

Specified Condition

A80-20 (LINL) - Body ground

Power switch on (IG)

Pulse generation
NG

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

OK

8.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY RH

*a

Component without harness connected

(Headlight ECU Sub-assembly RH)

-

-

(a) Remove the headlight ECU sub-assembly RH.

Click here 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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A80-20 (LINL) - C-13 (LINLI)

Always

Below 1 Ω
OK

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

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH 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

9.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ECU SUB-ASSEMBLY LH - HEADLIGHT ECU SUB-ASSEMBLY RH)

(a) Disconnect the A79 headlight ECU sub-assembly LH connector.

(b) Disconnect the A80 headlight ECU sub-assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A79-20 (LINL) or A80-20 (LINL) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

10.

CLEAR DTC

(a) Connect the A79 headlight ECU sub-assembly LH connector.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

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

(f) Clear the DTCs.

Body Electrical > AFS > Clear DTCs

NEXT

11.

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

Result

Proceed to

DTC B2425 is output

A

DTC B2424 and B2425 are output

B
B

GO TO STEP 15

A

12.

CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

(a) Remove the headlight ECU sub-assembly RH from headlight assembly RH.

Click here 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

(b) Connect the A80 headlight ECU sub-assembly RH connector.

NEXT

13.

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

14.

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

Result

Proceed to

DTC B2425 is output

A

DTC B2424 and B2425 are output

B
A

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

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH 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

15.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Remove the headlight ECU sub-assembly LH from headlight assembly LH.

Click here 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

(b) Connect the A79 headlight ECU sub-assembly LH connector.

(c) Connect the A80 headlight ECU sub-assembly RH connector.

NEXT

16.

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

17.

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

Result

Proceed to

DTC B2424 is output

A

DTC B2424 and B2425 are output

B
A

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

B

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