Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001AUMM
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 09/2022]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): B2424,B2425; Headlight Beam Level Control Motor LH Lost Communication; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

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 engine switch is on (IG).

Malfunction status:

  • LIN communication error

Malfunction duration:

  • 10 seconds or more
  • Headlight unit assembly LH
  • Headlight unit 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 engine switch is on (IG).

Malfunction status:

  • LIN communication error

Malfunction duration:

  • 10 seconds or more
  • Headlight unit assembly RH
  • Headlight unit 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 2019 - 2021 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 06/2021]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): INITIALIZATION 2022 MY Corolla Corolla Hatchback GR Corolla [06/2021 - 09/2022]; LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): INITIALIZATION

  • 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 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

C

GO TO STEP 4

D

GO TO STEP 8

B

3.

INSPECT HEADLIGHT ECU SUB-ASSEMBLY LH

*a

Component without harness connected

(Headlight ECU Sub-assembly LH)

-

-

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

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; 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

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

Always

Below 1 Ω

OK

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

4.

CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT CORD) - HEADLIGHT UNIT ASSEMBLY RH (HEADLIGHT CORD))

(a) Disconnect the A21 headlight unit assembly LH connector.

(b) Disconnect the A20 headlight unit assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A21-4 - A20-4

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT HEADLIGHT UNIT ASSEMBLY RH (HEADLIGHT CORD)

*1

Headlight Unit Assembly RH (Headlight Cord)

-

-

*a

Component without harness connected

(to Headlight ECU Sub-assembly RH)

*b

Component without harness connected

(to Wire Harness)

(a) Remove the headlight unit assembly RH.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A20-4 - A-20 (LINL)

Always

Below 1 Ω

NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

OK

6.

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 A21 headlight unit assembly LH connector.

(b) Connect the A20 headlight unit assembly RH connector.

(c) Using a Techstream, check the waveform.

OK:

Tester Connection

Condition

Specified Condition

A-20 (LINL) - Body ground

Engine switch on (IG)

Pulse generation

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH

OK

7.

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 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; 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

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

Always

Below 1 Ω

OK

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

NG

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

8.

CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY LH (HEADLIGHT CORD) - HEADLIGHT UNIT ASSEMBLY RH (HEADLIGHT CORD))

(a) Disconnect the A21 headlight unit assembly LH connector.

(b) Disconnect the A20 headlight unit assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A21-4 or A20-4 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

9.

CLEAR DTC

(a) Connect the A21 headlight unit assembly LH connector.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine 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

10.

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

Result

Proceed to

DTC B2425 is output

A

DTC B2424 and B2425 are output

B

B

GO TO STEP 17

A

11.

CHECK HEADLIGHT UNIT ASSEMBLY RH

(a) Remove the headlight unit assembly RH.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

(b) Connect the A20 headlight unit assembly RH connector.

NEXT

12.

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

13.

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

Result

Proceed to

DTC B2425 is output

A

DTC B2424 and B2425 are output

B

B

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

A

14.

CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

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

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

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

NEXT

15.

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

16.

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

Result

Proceed to

DTC B2425 is output

A

DTC B2424 and B2425 are output

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY RH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

17.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

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

Click here 2019 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 09/2022]; LIGHTING (EXT): HEADLIGHT ECU: REMOVAL

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

(c) Disconnect the A20 headlight unit assembly RH connector.

NEXT

18.

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

19.

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

Result

Proceed to

DTC B2424 is output

A

DTC B2424 and B2425 are output

B

A

REPLACE HEADLIGHT UNIT ASSEMBLY LH 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; LIGHTING (EXT): HEADLIGHT ASSEMBLY: DISASSEMBLY

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH