| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028LVN |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: B232588; Door LIN Bus off; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
DTC |
B232588 |
Door LIN Bus off |
DESCRIPTION
If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more, DTC B232588 will be stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
B232588 |
Door LIN Bus off |
The main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more. |
|
Main Body |
- *1: w/ Sliding Roof System
- *2: w/ Rear Seat
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.
Click here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM: REGISTRATION](/t3Portal/stylegraphics/info.gif)
-
When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*
Click here
- *: w/ Sliding Roof System
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
for HV Model: Click here
for Gasoline Model, except TMMMS Made: Click here
- *: w/ Smart Key System
PROCEDURE
|
1. |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) |
(a) Disconnect the L2 power window regulator motor assembly (driver door) connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the same DTC is output again.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
|
|
2. |
CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the same DTC is output again.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
|
|
3. |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) |
(a) Disconnect the K2 power window regulator motor assembly (for front passenger door) connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the same DTC is output again.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) |
|
|
4. |
SYSTEM CHECK |
(a) Check the vehicle specification.
|
Result |
Proceed to |
|---|---|
|
w/ Rear Seat |
A |
|
w/o Rear Seat |
B |
| B |
|
|
|
5. |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) |
(a) Disconnect the M2 power window regulator motor assembly (rear RH door) connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the same DTC is output again.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) |
|
|
6. |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) |
(a) Disconnect the N2 power window regulator motor assembly (rear LH door) connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the same DTC is output again.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) |
|
|
7. |
SYSTEM CHECK |
(a) Check the vehicle specification.
|
Result |
Proceed to |
|---|---|
|
w/ Sliding Roof System |
A |
|
w/o Sliding Roof System |
B |
| B |
|
|
|
8. |
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
(a) Disconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
(c) After 10 seconds have elapsed, check if the DTC is output.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC B232588 is output |
A |
|
DTC B232588 is not output |
B |
| B |
|
REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
|
|
9. |
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - EACH ECU) |
(a) Disconnect the 8H and 8A* power distribution box assembly assembly connector.
- *: w/ Sliding Roof System
(b) Disconnect all connectors shown in the wiring diagram.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - Body ground |
Always |
10 kΩ or higher |
|
8H-11 - Other terminals |
Always |
10 kΩ or higher |
|
8A-15 - Body ground* |
Always |
10 kΩ or higher |
|
8A-15 - Other terminals* |
Always |
10 kΩ or higher |
- *: w/ Sliding Roof System
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
INSPECT POWER DISTRIBUTION BOX ASSEMBLY |
|
*a |
Component without harness connected (Power Distribution Box Assembly) |
- |
- |
(a) Remove the power distribution box assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the power distribution box assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
8H-11 - 8D-1*1 |
Always |
10 kΩ or higher |
|
8H-11 or 8A-15 - 8D-1*2 |
Always |
10 kΩ or higher |
|
MB-15 (LIN2) - Other terminals |
Always |
10 kΩ or higher |
- *1: w/o Sliding Roof System
- *2: w/ Sliding Roof System
| NG |
|
|
|
11. |
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
(a) Install the main body ECU (multiplex network body ECU) to the power distribution box assembly.
(b) Connect all power distribution box assembly connectors other than 8H and 8A.
|
*a |
Component with harness connected (Power Distribution Box Assembly) |
*b |
Waveform |
(c) Using a GTS, check the waveform.
HINT:
This inspection is to check the LIN communication line in the power distribution box assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
OK:
|
Tester Connection |
Condition |
Tool Setting |
Specified Condition |
|---|---|---|---|
|
8H-11 - Body ground |
Ignition switch ON |
2 V/DIV., 200 ms/DIV. |
Pulse generation (See waveform) |
|
8A-15 - Body ground* |
Ignition switch ON |
2 V/DIV., 200 ms/DIV. |
Pulse generation (See waveform) |
- *: w/ Sliding Roof System
| OK |
|
| NG |
|
|
12. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-16 (LIN2) - Body ground |
Always |
10 kΩ or higher |
|
L7-16 (LIN2) - Other terminals |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|