Networking. Dtc B2325 Lin Communication Bus Malfunction

The main body ECU (multiplex network 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 (multiplex network body ECU) detects a malfunction in the LIN communication bus between components related to the doors and sliding roof consecutively 3 times.

for LHD:

Multiplex network master switch assembly
Front power window regulator motor LH
Front power window regulator motor RH*1
Rear power window regulator motor LH*1
Rear power window regulator motor RH*1
Sliding roof driver gear sub-assembly (Sliding roof ECU)*2
Double lock door control relay*3
Main body ECU (multiplex network body ECU)
Harness or connector

for RHD:

Multiplex network master switch assembly
Front power window regulator motor RH
Front power window regulator motor LH*1
Rear power window regulator motor RH*1
Rear power window regulator motor LH*1
Sliding roof driver gear sub-assembly (Sliding roof ECU)*2
Double lock door control relay assembly*3
Main body ECU (multiplex network body ECU)
Harness or connector

*1: for Models with Jam Protection Function on 4 Windows
*2: w/ Sliding Roof System
*3: w/ Double Locking System

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Networking.Lin Communication System.
Dtc
B2325 Lin Communication Bus Malfunction

INSPECTION PROCEDURE

NOTICE:

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

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

1.CLEAR DTC

Clear the DTC (Click here).

NEXT

2.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output
B

USE SIMULATION METHOD TO CHECK (Click here)

A

3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)

*1: w/ Sliding Roof System
*2: for Models with Jam Protection Function on 4 Windows
*3: w/ Double Locking System

for LHD:
1. Disconnect the A main body ECU connector.
2. Disconnect the R18 sliding roof ECU connector*1.
3. Disconnect the I12 power window regulator motor connector.
4. Disconnect the I4, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I11 master switch connector.
6. Disconnect the E167 double lock door control relay connector*3.
7. Measure the resistance according to the value(s) in the tables below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  A-16 (LIN2) - I11-17 (LIN1)
  Always
  Below 1 Ω
  A-16 (LIN2) - Body ground
  Always
  10 kΩ or higher

for RHD:
1. Disconnect the A main body ECU connector.
2. Disconnect the R18 sliding roof ECU connector*1.
3. Disconnect the I4 power window regulator motor connector.
4. Disconnect the I12, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I22 master switch connector.
6. Disconnect the E167 double lock door control relay connector*3.
7. Measure the resistance according to the value(s) in the tables below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  A-16 (LIN2) - I22-17 (LIN1)
  Always
  Below 1 Ω
  A-16 (LIN2) - Body ground
  Always
  10 kΩ or higher

Go to step 18

OK

4.CLEAR DTC

*1: w/ Sliding Roof System
*2: for Models with Jam Protection Function on 4 Windows
*3: w/ Double Locking System

for LHD:
1. Reconnect the A main body ECU connector.
2. Reconnect the R18 sliding roof ECU connector*1.
3. Reconnect the I12 power window regulator motor connector.
4. Reconnect the I4, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I11 master switch connector.
6. Reconnect the E167 double lock door control relay connector*3.

for RHD:
1. Reconnect the A main body ECU connector.
2. Reconnect the R18 sliding roof ECU connector*1.
3. Reconnect the I4 power window regulator motor connector.
4. Reconnect the I12, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I22 master switch connector.
6. Reconnect the E167 double lock door control relay connector*3.

Clear the DTC (Click here).

NEXT

5.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output
B

REPLACE MASTER SWITCH (Click here)

A

6.CLEAR DTC

for LHD:
1. Reconnect the I11 master switch connector.
2. Disconnect the I12 power window regulator motor connector.

for LHD:
1. Reconnect the I22 master switch connector.
2. Disconnect the I4 power window regulator motor connector.

Clear the DTC (Click here).

NEXT

7.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output (for LHD)
B
DTC B2325 is not output (for RHD)
C

REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH (Click here)

REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH (Click here)

A

8.CLEAR DTC

*: for Models with Jam Protection Function on 4 Windows

for LHD:
1. Reconnect the I12 power window regulator motor connector.
2. Disconnect the I4 power window regulator motor connector*.

for LHD:
1. Reconnect the I4 power window regulator motor connector.
2. Disconnect the I12 power window regulator motor connector*.

Clear the DTC (Click here).

NEXT

9.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output (for LHD)
B
DTC B2325 is not output (for RHD)
C

REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH (Click here)

REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH (Click here)

A

10.CLEAR DTC

*: for Models with Jam Protection Function on 4 Windows

for LHD:
1. Reconnect the I4 power window regulator motor connector*.
2. Disconnect the J4 power window regulator motor connector*.

for LHD:
1. Reconnect the I12 power window regulator motor connector*.
2. Disconnect the J4 power window regulator motor connector*.

Clear the DTC (Click here).

NEXT

11.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output
B

REPLACE REAR POWER WINDOW REGULATOR MOTOR RH (Click here)

A

12.CLEAR DTC

*: for Models with Jam Protection Function on 4 Windows

Reconnect the J4 power window regulator motor connector*.

Disconnect the J11 power window regulator motor connector*.

Clear the DTC (Click here).

NEXT

13.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output
B

REPLACE REAR POWER WINDOW REGULATOR MOTOR LH (Click here)

A

14.CLEAR DTC

*1: for Models with Jam Protection Function on 4 Windows
*2: w/ Double Locking System

Reconnect the J11 power window regulator motor connector*1.

Disconnect the E167 double lock door control relay connector*2.

Clear the DTC (Click here).

NEXT

15.CHECK FOR DTC

Recheck for DTC (Click here).
Result
Result
Proceed to
DTC B2325 is output
A
DTC B2325 is not output (for LHD)
B
DTC B2325 is not output (for RHD)
C

REPLACE DOUBLE LOCK DOOR CONTROL RELAY (Click here)

A

16.CLEAR DTC

*1: w/ Double Locking System
*2: w/ Sliding Roof System

Reconnect the J11 power window regulator motor connector*1.

Disconnect the R18 sliding roof ECU connector*2.

Clear the DTC (Click here).

NEXT

17.CHECK FOR DTC

Recheck for DTCs (Click here).
Result
Result
Proceed to
DTC B2325 is output (for LHD)
A
DTC B2325 is output (for RHD)
B
DTC B2325 is not output
C

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (Click here)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (Click here)

18.CHECK HARNESS AND CONNECTOR (COWL SIDE JUNCTION BLOCK LH - MASTER SWITCH)

*1: w/ Sliding Roof System
*2: for Models with Jam Protection Function on 4 Windows
*3: w/ Double Locking System

for LHD:
1. Disconnect the 2J cowl side junction block LH connector.
2. Disconnect the R18 sliding roof ECU connector*1.
3. Disconnect the I12 power window regulator motor connector.
4. Disconnect the I4, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I11 master switch connector.
6. Disconnect the E167 double lock door control relay connector*3.
7. Measure the resistance according to the value(s) in the tables below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  2J-13 - I11-17 (LIN1)
  Always
  Below 1 Ω
  2J-13 - Body ground
  Always
  10 kΩ or higher

for RHD:
1. Disconnect the 2J cowl side junction block LH connector.
2. Disconnect the R18 sliding roof ECU connector*1.
3. Disconnect the I4 power window regulator motor connector.
4. Disconnect the I12, J4 and J11 power window regulator motor connectors*2.
5. Disconnect the I22 master switch connector.
6. Disconnect the E167 double lock door control relay connector*3.
7. Measure the resistance according to the value(s) in the tables below.
  Standard Resistance:
  Tester Connection
  Condition
  Specified Condition
  2J-13 - I22-17 (LIN1)
  Always
  Below 1 Ω
  2J-13 - Body ground
  Always
  10 kΩ or higher

Result
Result	Proceed to
OK (for LHD)	A
OK (for RHD)	B
NG	C

REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

Result	Proceed to
DTC B2325 is output	A
DTC B2325 is not output	B

Tester Connection	Condition	Specified Condition
A-16 (LIN2) - I11-17 (LIN1)	Always	Below 1 Ω
A-16 (LIN2) - Body ground	Always	10 kΩ or higher

Result	Proceed to
DTC B2325 is output (for LHD)	A
DTC B2325 is output (for RHD)	B
DTC B2325 is not output	C