Toyota Yaris: Lin Communication System / Door LIN Bus off (B232588)

Toyota Yaris XP210 (2020-2026) Reapir and 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)
  • Wire harness or connector

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

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

DTC B232588 is output

A

DTC B232588 is not output

B
B

USE SIMULATION METHOD TO CHECK

A

3.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

4.

CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

(a) Disconnect the L7 front power window regulator motor assembly (driver door) connector.

(b) 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 B232187 is not output

B
B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

A

5.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

6.

CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the L13 multiplex network master switch assembly connector.

(b) 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 B120687 and B232187 is not output

B
B

GO TO STEP 12

A

7.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

8.

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

(a) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.

(b) 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 B232287 is not output

B
B

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

A

9.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

10.

CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT)

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

Click here

(b) Reconnect the power distribution box assembly connector.

(c) Disconnect the L7 front power window regulator motor assembly (driver door) connector.

(d) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

MB-15 (LIN2) - Body ground

Always

10 kΩ or higher

MB-15 (LIN2) - Other terminals

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

11.

CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT)

(a) Disconnect the 4E power distribution box assembly connector.

(b) Disconnect the L7 front power window regulator motor assembly (driver door) connector.

(c) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4E-17 - Body ground

Always

10 kΩ or higher

4E-17 - Other terminals

Always

10 kΩ or higher
OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR))

(a) Disconnect the L13 multiplex network master switch assembly connector.

(b) Disconnect the L7 front power window regulator motor assembly (driver door) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

L13-16 (LIN2) or L7-9 (LIN) - Body ground

Always

Below 1 Ω
OK

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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