Toyota Corolla Cross: Door LIN Bus off (B232588)

Toyota Corolla Cross (2022-2024) Service Manual / Power Source & Network / Networking / Lin Communication System / Door LIN Bus off (B232588)

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
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 ECU (multiplex network body ECU) Power distribution box assembly Multiplex network master switch assembly Front power window regulator motor assembly (driver door) Front power window regulator motor assembly (front passenger door) Rear power window regulator motor assembly (rear RH door) Rear power window regulator motor assembly (rear LH door) Sliding roof ECU (sliding roof drive gear sub-assembly)*1 Wire harness or connector

*1: w/ Sliding Roof System

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
When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*1
Click here
- *1: w/ Sliding Roof System
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
- for HEV Model: Click here
- for Gasoline Model: Click here

PROCEDURE

CLEAR DTC

(a) Disconnect the L2 front power window regulator motor assembly (driver door) connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

2.	CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

CLEAR DTC

(a) Disconnect the L7 multiplex network master switch assembly connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

4.	CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

GO TO STEP 17

CLEAR DTC

(a) Disconnect the K2 front power window regulator motor assembly (front passenger door) connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

6.	CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

CLEAR DTC

(a) Disconnect the M2 rear power window regulator motor assembly (rear RH door) connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

8.	CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

CLEAR DTC

(a) Disconnect the N2 rear power window regulator motor assembly (rear LH door) connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

10.	CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

11.	CHECK VEHICLE TYPE

(a) Check the vehicle specification.

Result	Proceed to
w/ Sliding Roof System	A
w/o Sliding Roof System	B

GO TO STEP 14

12.

CLEAR DTC

(a) Disconnect the T12 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

(b) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

13.	CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

(a) Wait for at least 10 seconds.

(b) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
B232588 is output	A
B232588 is not output	B

GO TO STEP 14

REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

14.	CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - EACH ECU)

(a) Disconnect the 8B and 8F power distribution box assembly connectors.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
8F-17 - Body ground	Always	10 kΩ or higher
8F-17 - Other terminals	Always	10 kΩ or higher
8B-37 - Body ground	Always	10 kΩ or higher
8B-37 - Other terminals	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

15.	INSPECT POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the power distribution box assembly.

HINT:

Click here

(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Component without harness connected

(Power Distribution Box Assembly)

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
8B-37 - 8B-36	Always	10 kΩ or higher
8B-37 - 8C-41	Always	10 kΩ or higher
8F-17 - 8B-36	Always	10 kΩ or higher
8F-17 - 8C-41	Always	10 kΩ or higher
MB-15 (LIN2) - Other terminals	Always	10 kΩ or higher

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

16.	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.

Component with harness connected

(Power Distribution Box Assembly)

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

Switch Condition

Tool Setting

Specified Condition

8B-37 - Body ground

Ignition switch ON

2 V/DIV., 200 ms/DIV.

Pulse generation

(See waveform)

8F-17 - Body ground

Ignition switch ON

2 V/DIV., 200 ms/DIV.

Pulse generation

(See waveform)

USE SIMULATION METHOD TO CHECK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

17.	CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT 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	Below 1 Ω
L7-16 (LIN2) - Other terminals	Always	Below 1 Ω

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

SEE MORE:

Removal

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