Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJF2
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: NETWORKING: LIN COMMUNICATION SYSTEM: B2325; LIN Communication Bus Malfunction; 2016 - 2020 MY Sienna [12/2015 -        ]

DTC

B2325

LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU intermittently monitors the LIN communication bus between the components related to the door and sliding roof. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the door and sliding roof is detected consecutively 3 times.

DTC Code

DTC Detection Condition

Trouble Area

B2325

The main body ECU detects a malfunction in the LIN communication bus between components related to the doors consecutively 3 times.
  • Multiplex Network master switch assembly
  • Front power window regulator motor assembly LH
  • Front power window regulator motor assembly RH
  • Rear power window regulator motor assembly LH
  • Rear power window regulator motor assembly RH
  • Main body ECU
  • Harness or connector
  • Instrument panel junction block assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the ignition switch off to troubleshoot:

Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.

HINT:

When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform the troubleshooting for the LIN communication stop DTC. Then perform the troubleshooting for DTC B2325.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

2.

CHECK FOR DTC

(a) Check for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
B

USE SIMULATION METHOD TO CHECK
A

3.

INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Remove the multiplex network master switch assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; WINDOW / GLASS: POWER WINDOW MASTER SWITCH: REMOVAL ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

16 (LIN2) - 17 (LIN1)

Always

Below 1 Ω

Text in Illustration

*a

Component without harness connected

(Multiplex Network Master Switch Assembly)
NG

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
OK

4.

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

(a) Disconnect the H14 multiplex network master switch assembly connector.

(b) Disconnect the H1 front power window regulator motor assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H14-16 (LIN2) - H1-9 (LIN)

Always

Below 1 Ω

H14-16 (LIN2) or H1-9 (LIN) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Text in Illustration

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the instrument panel junction block assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL ).

(b) Remove the main body ECU from the instrument panel junction block assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2D-18 - 2I-16 (LIN2)

Always

Below 1 Ω

2D-33 - 2I-16 (LIN2)

Always

Below 1 Ω

2H-27 - 2I-16 (LIN2)

Always

Below 1 Ω
NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

6.

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - EACH ECU)

(a) Disconnect the 2D and 2H instrument panel junction block assembly connectors.

(b) Disconnect the H14 multiplex network master switch assembly connector.

(c) Disconnect the J7 rear power window regulator motor assembly LH connector.

(d) Disconnect the G1 front power window regulator motor assembly RH connector.

(e) Disconnect the I7 rear power window regulator motor assembly RH connector.

(f) Measure the resistance according to the value(s) in the tables below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2D-18 - H14-17 (LIN1)

Always

Below 1 Ω

2H-27 - J7-9 (LIN)

Always

Below 1 Ω

2D-33 - G1-9 (LIN)

Always

Below 1 Ω

2D-33 - I7-9 (LIN)

Always

Below 1 Ω

2D-18 or H14-17 (LIN1) - Body ground

Always

10 kΩ or higher

2H-27 or J7-9 (LIN) - Body ground

Always

10 kΩ or higher

2D-33 or G1-9 (LIN) - Body ground

Always

10 kΩ or higher

2D-33 or I7-9 (LIN) - Body ground

Always

10 kΩ or higher

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CLEAR DTC

(a) Reconnect the 2D and 2H instrument panel junction block assembly connectors.

(b) Reconnect the J7 rear power window regulator motor assembly LH connector.

(c) Reconnect the G1 front power window regulator motor assembly RH connector.

(d) Reconnect the H1 front power window regulator motor assembly LH connector.

(e) Reconnect the I7 rear power window regulator motor assembly RH connector.

(f) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

8.

CHECK FOR DTC

(a) After 10 seconds have elapsed, check if the same DTC is output again (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
B

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

A

9.

CLEAR DTC

(a) Reconnect the H14 multiplex network master switch assembly connector.

(b) Disconnect the H1 front power window regulator motor assembly LH connector.

(c) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

10.

CHECK FOR DTC

(a) After 10 seconds have elapsed, check if the same DTC is output again (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

A

11.

CLEAR DTC

(a) Reconnect the H1 front power window regulator motor assembly LH connector.

(b) Disconnect the G1 front power window regulator motor assembly RH connector.

(c) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

12.

CHECK FOR DTC

(a) After 10 seconds have elapsed, check if the same DTC is output again (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

A

13.

CLEAR DTC

(a) Reconnect the G1 front power window regulator motor assembly RH connector.

(b) Disconnect the I7 rear power window regulator motor assembly RH connector.

(c) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

14.

CHECK FOR DTC

(a) After 10 seconds have elapsed, check if the same DTC is output again (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
B

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

A

15.

CLEAR DTC

(a) Reconnect the I7 rear power window regulator motor assembly RH connector.

(b) Disconnect the J7 rear power window regulator motor assembly LH connector.

(c) Clear the DTC (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

NEXT

16.

CHECK FOR DTC

(a) After 10 seconds have elapsed, check if the same DTC is output again (See page 2016 - 2020 MY Sienna [12/2015 -        ]; NETWORKING: LIN COMMUNICATION SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC B2325 is output

A

DTC B2325 is not output

B
A

REPLACE MAIN BODY ECU

B

REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH