The main body ECU (cowl side junction block LH) intermittently monitors the LIN communication bus between the components related to the door, double lock control relay*2 and sliding roof*1. DTC B2325 is stored when a malfunction in the LIN communication bus between the components related to the doors, double lock control relay*2 and sliding roof*1 is detected consecutively 3 times.

HINT:

*1: w/ Sliding Roof System

*2: w/ Double Locking System

DTC Code

DTC Detection Condition

Trouble Area

B2325

The main body ECU (cowl side junction block LH) detects a malfunction in the LIN communication bus between components related to the doors and sliding roof consecutively 3 times.

for Models with jam protection function on 4 windows

Master switch

Front power window regulator motor LH

Front power window regulator motor RH

Rear power window regulator motor LH

Rear power window regulator motor RH

Sliding roof ECU*1

Double lock door control relay*2

Main body ECU (cowl side junction block LH)

Harness or connector

for Models with jam protection function on driver door window only

Front power window regulator motor LH (for LHD)

Front power window regulator motor RH (for RHD)

Double lock door control relay*2

Main body ECU (cowl side junction block LH)

Harness or connector

WIRING DIAGRAM

Dtc B2325 Lin Communication Bus Malfunction. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

When using the intelligent tester with the ignition switch off to troubleshoot:

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

NEXT

2.CHECK FOR DTC

Recheck for DTCs ().

Result
Result	Proceed to
DTC B2325 is output (for Models with Jam Protection Function on 4 Windows)	A
DTC B2325 is output (for Models with Jam Protection Function on Driver Door Window Only)	B
DTC B2325 is not output	C

B

Go to step 18

C

USE SIMULATION METHOD TO CHECK ()

A

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

Dtc B2325 Lin Communication Bus Malfunction. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E3 ECU connector.

Disconnect the I11*1 or I22*2 switch connector.

HINT:

*1: for LHD

*2: for RHD

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

Standard Resistance:
Tester Connection Condition Specified Condition
E3-10 (LIN2) - I11-17 (LIN1)*1 or I22-17 (LIN1)*2 Always Below 1 Ω
E3-10 (LIN2) - Body ground Always 10 kΩ or higher

Standard Voltage:
Tester Connection Condition Specified Condition
E3-10 (LIN2) - Body ground Always Below 1 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.CLEAR DTC

Reconnect the E3 ECU connector.

Disconnect the I11*1 or I22*2 switch connector.

HINT:

*1: for LHD

*2: for RHD

Clear the DTC ().

NEXT

5.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE MASTER SWITCH

A

6.CLEAR DTC

Reconnect the I11*1 or I22*2 switch connector.

HINT:

*1: for LHD

*2: for RHD

Disconnect the I12 motor connector.

Clear the DTC ().

NEXT

7.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH ()

A

8.CLEAR DTC

Reconnect the I12 motor connector.

Disconnect the I4 motor connector.

Clear the DTC ().

NEXT

9.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH ()

A

10.CLEAR DTC

Reconnect the I4 motor connector.

Disconnect the J4 motor connector.

Clear the DTC ().

NEXT

11.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE REAR POWER WINDOW REGULATOR MOTOR LH ()

A

12.CLEAR DTC

Reconnect the J4 motor connector.

Disconnect the J11 motor connector.

Clear the DTC ().

NEXT

13.CHECK FOR DTC

Recheck for DTCs ().

Result
Result	Proceed to
DTC B2325 is output (w/ Double Locking System)	A
DTC B2325 is output (w/o Double Locking System, w/ Sliding Roof System)	B
DTC B2325 is output (w/o Double Locking System, w/o Sliding Roof System)	C
DTC B2325 is not output	D

B

Go to step 16

C

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

D

REPLACE REAR POWER WINDOW REGULATOR MOTOR RH ()

A

14.CLEAR DTC

Reconnect the J11 motor connector.

Disconnect the E86 relay connector.

Clear the DTC ().

NEXT

15.CHECK FOR DTC

Recheck for DTC ().

Result
Result	Proceed to
DTC B2325 is output (w/ Sliding Roof System)	A
DTC B2325 is output (w/o Sliding Roof System)	B
DTC B2325 is not output (for LHD)	C
DTC B2325 is not output (for RHD)	D

B

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

C

REPLACE DOUBLE LOCK DOOR CONTROL RELAY ()

D

REPLACE DOUBLE LOCK DOOR CONTROL RELAY ()

A

16.CLEAR DTC

Reconnect the E86 relay connector.

Disconnect the R5 ECU connector.

Clear the DTC ().

NEXT

17.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY ()

A

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

18.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - FRONT POWER WINDOW REGULATOR MOTOR)

Disconnect the E3 ECU connector.

Disconnect the I12*1 or I4*2 motor connector.

HINT:

*1: for LHD

*2: for RHD

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

Standard Resistance:
Tester Connection Condition Specified Condition
E3-10 (LIN2) - I12-9 (LIN)*1 or I4-9 (LIN)*2 Always Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

19.CLEAR DTC

Reconnect the E3 ECU connector.

Disconnect the I12*1 or I4*2 motor connector.

HINT:

*1: for LHD

*2: for RHD

Clear the DTC ().

NEXT

20.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE FRONT POWER WINDOW REGULATOR MOTOR LH ()

C

REPLACE FRONT POWER WINDOW REGULATOR MOTOR RH ()

A

21.CLEAR DTC

Reconnect the I12*1 or I4*2 motor connector.

HINT:

*1: for LHD

*2: for RHD

Disconnect the E86 relay connector.

Clear the DTC ().

NEXT

22.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE DOUBLE LOCK DOOR CONTROL RELAY ()

C

REPLACE DOUBLE LOCK DOOR CONTROL RELAY ()

A

REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

NETWORKING

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

LIN COMMUNICATION SYSTEM

Tester Connection	Condition	Specified Condition
E3-10 (LIN2) - I11-17 (LIN1)1 or I22-17 (LIN1)2	Always	Below 1 Ω
E3-10 (LIN2) - Body ground	Always	10 kΩ or higher