LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): B2410,B2411; Headlight Swivel ECU LH Communication; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001AUMH
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 09/2022]
Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): B2410,B2411; Headlight Swivel ECU LH Communication; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]

DTC

B2410

Headlight Swivel ECU LH Communication

DTC

B2411

Headlight Swivel ECU RH 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
B2410	Headlight Swivel ECU LH 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
B2411	Headlight Swivel ECU RH 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
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 B2410 and B2411 are not output.

Result	Proceed to
OK	A
NG (DTC B2410 is output)	B
NG (DTC B2411 is output)	C
NG (DTC B2410 and B2411 are output)	D

A

USE SIMULATION METHOD TO CHECK

C

D

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-19 (LINS) - C-4 (LINSI)	Always	Below 1 Ω

OK

REPLACE HEADLIGHT UNIT ASSEMBLY LH

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
A21-8 - A20-8	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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A20-8 - A-19 (LINS)	Always	Below 1 Ω

NG

REPLACE HEADLIGHT UNIT ASSEMBLY RH

OK

6.	CHECK HEADLIGHT ECU SUB-ASSEMBLY LH (LINS 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-19 (LINS) - 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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-19 (LINS) - C-4 (LINSI)	Always	Below 1 Ω

OK

REPLACE HEADLIGHT UNIT ASSEMBLY RH

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
A21-8 or A20-8 - 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 B2411 is output	A
DTC B2410 and B2411 are output	B

B

A

11.	CHECK HEADLIGHT UNIT ASSEMBLY RH

(a) Remove the headlight unit assembly RH.

Click here

(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 B2411 is output	A
DTC B2410 and B2411 are output	B

B

REPLACE HEADLIGHT UNIT ASSEMBLY RH

A

14.	CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

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

Click here

(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 B2411 is output	A
DTC B2410 and B2411 are output	B

A

REPLACE HEADLIGHT UNIT ASSEMBLY RH

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH

17.	CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

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

Click here

(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 B2410 is output	A
DTC B2410 and B2411 are output	B

A

REPLACE HEADLIGHT UNIT ASSEMBLY LH

B

REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH