| 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:
Malfunction status:
Malfunction duration:
|
|
AFS |
|
B2425 |
Headlight Beam Level Control Motor RH Lost Communication |
Detection condition:
Malfunction status:
Malfunction duration:
|
|
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](/t3Portal/stylegraphics/info.gif)
- 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
|
|
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 |
|
| C |
|
| D |
|
|
|
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-20 (LINL) - C-13 (LINLI) |
Always |
Below 1 Ω |
| OK |
|
REPLACE HEADLIGHT UNIT ASSEMBLY LH
|
| NG |
|
|
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 |
|
|
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 |
|---|---|---|
|
A20-4 - A-20 (LINL) |
Always |
Below 1 Ω |
| NG |
|
REPLACE HEADLIGHT UNIT ASSEMBLY RH
|
|
|
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 |
|
|
|
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-20 (LINL) - C-13 (LINLI) |
Always |
Below 1 Ω |
| OK |
|
REPLACE HEADLIGHT UNIT ASSEMBLY RH
|
| NG |
|
|
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 |
|
|
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
|
|
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 |
|
|
|
11. |
CHECK HEADLIGHT UNIT ASSEMBLY RH |
(a) Remove the headlight unit assembly RH.
Click here
(b) Connect the A20 headlight unit assembly RH connector.
|
|
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
|
|
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
|
|
|
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.
|
|
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
|
|
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
|
| B |
|
|
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.
|
|
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
|
|
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
|
| B |
|
|
|