RM3660EC _57 Power Source / Network _080743 NETWORKING _0600577 LIN COMMUNICATION SYSTEM(for NR Series Engine) C

NETWORKING LIN COMMUNICATION SYSTEM(for NR Series Engine) B2325 LIN Communication Bus Malfunction

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 B2325 will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2325	LIN Communication Bus Malfunction	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) · Driver side junction block assembly · Multiplex network master switch assembly · Power window regulator motor assembly (driver door) · Power window regulator motor assembly (front passenger door) · Power window regulator motor assembly (rear LH door) · Power window regulator motor assembly (rear RH door) · Sliding roof ECU (sliding roof drive gear sub-assembly)* · Wire harness or connector

*: w/ Sliding Roof System

WIRING DIAGRAM

1.885,3.406 2.5,3.604 0.615,0.198 10 false LIN2 1.813,3.771 2.427,3.969 0.615,0.198 10 false GND1 4.552,1.552 5.583,1.75 1.031,0.198 10 false L2 4.552,1.698 6.521,2.208 1.969,0.51 10 false Power Window Regulator Motor Assembly (Driver Door) 3.365,3.604 3.979,3.802 0.615,0.198 10 false 3 3.333,3.25 3.948,3.448 0.615,0.198 10 false 25 2.26,6.354 2.875,6.552 0.615,0.198 10 false 9 4.813,0.927 5.427,1.125 0.615,0.198 10 false 9 4.823,4.729 5.438,4.927 0.615,0.198 10 false 9 4.813,6.354 5.427,6.552 0.615,0.198 10 false 9 4.604,3.74 5.635,3.938 1.031,0.198 10 false L7 4.604,3.906 6.24,4.406 1.635,0.5 10 false Multiplex Network Master Switch Assembly 4.625,5.365 5.656,5.563 1.031,0.198 10 false N2 4.625,5.521 6.573,5.885 1.948,0.365 10 false Power Window Regulator Motor Assembly (Rear LH Door) 4.635,7 5.667,7.198 1.031,0.198 10 false M2 4.646,7.167 6.615,7.677 1.969,0.51 10 false Power Window Regulator Motor Assembly (Rear RH Door) 4.979,6.49 5.594,6.688 0.615,0.198 10 false LIN 4.979,4.854 5.594,5.052 0.615,0.198 10 false LIN 5,3.417 5.615,3.615 0.615,0.198 10 false LIN1 4.99,1.052 5.604,1.25 0.615,0.198 10 false LIN 4.99,3.042 5.604,3.24 0.615,0.198 10 false LIN2 1.969,6.469 2.583,6.667 0.615,0.198 10 false LIN 0.552,7 1.583,7.198 1.031,0.198 10 false K2 0.542,7.167 3.125,7.719 2.583,0.552 10 false Power Window Regulator Motor Assembly (Front Passenger Door) 3.313,3.427 3.927,3.625 0.615,0.198 10 false 4A 3.333,3.792 3.948,3.99 0.615,0.198 10 false 4F 2.25,3.281 2.865,3.479 0.615,0.198 10 false 16 0.635,8.448 2.792,8.708 2.156,0.26 10 false : LIN Communication Line 4.75,2.917 5.365,3.115 0.615,0.198 10 false 16 4.76,3.281 5.375,3.479 0.615,0.198 10 false 17 1.052,4.24 1.365,4.438 0.313,0.198 10 false MB 1.052,4.396 2.198,5.01 1.146,0.615 10 false Main Body ECU (Multiplex Network Body ECU) 2.302,4.115 3.521,4.729 1.219,0.615 10 false Driver Side Junction Block Assembly 2.25,3.688 2.865,3.885 0.615,0.198 10 false 11 3.323,3.063 3.635,3.26 0.313,0.198 10 false 4F 3.313,2.875 3.927,3.073 0.615,0.198 10 false 17* 1.813,1.042 2.427,1.24 0.615,0.198 10 false MPX1 0.635,1.719 2.854,2.146 2.219,0.427 10 false Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)* 0.656,1.552 1.219,1.792 0.563,0.24 10 false T12 2.281,0.906 2.438,1.104 0.156,0.198 10 false 7 4.615,8.427 6.531,8.698 1.917,0.271 10 false *: w/ Sliding Roof System

CAUTION / NOTICE / HINT

NOTICE:: ·

When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.

Click hereVehicle Exterior>WINDOW / GLASS>POWER WINDOW CONTROL SYSTEM (for NR Series Engine)>INITIALIZATION202304,999999,_59,_080745,_0600092,RM100000002BB4K,

·

When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*

Click hereVehicle Exterior>SLIDING ROOF / CONVERTIBLE>SLIDING ROOF SYSTEM (for NR Series Engine)>INITIALIZATION202304,999999,_59,_080734,_0600093,RM100000002BB5I,

*: w/ Sliding Roof System

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE

1.CHECK FRONT DOOR WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

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

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the same DTC is output again.

Body Electrical > Main Body > Trouble Codes: 50001 123

Result:

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

2.CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

Click hereVehicle Exterior>WINDOW / GLASS>POWER WINDOW REGULATOR MOTOR (for Front Door)>REMOVAL202304,202307,_59,_080745,_0392468,RM100000002BHDF,202307,202406,_59,_080745,_0392468,RM100000002D3U5,202406,999999,_59,_080745,_0392468,RM100000002N5XS,

2.CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

Disconnect the L7 multiplex network master switch assembly connector.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the same DTC is output again.

Body Electrical > Main Body > Trouble Codes: 50001 123

Result:

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

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

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

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

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

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the same DTC is output again.

Body Electrical > Main Body > Trouble Codes: 50001 123

Result:

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

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

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

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

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

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the same DTC is output again.

Body Electrical > Main Body > Trouble Codes: 50001 123

Result:

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

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

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

Click hereVehicle Exterior>WINDOW / GLASS>POWER WINDOW REGULATOR MOTOR (for Rear Door)>REMOVAL202304,202307,_59,_080745,_0392469,RM100000002BHDG,202307,202406,_59,_080745,_0392469,RM100000002D3V0,202406,999999,_59,_080745,_0392469,RM100000002N5YW,

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

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

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the same DTC is output again.

Body Electrical > Main Body > Trouble Codes: 50001 123

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	C

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

8.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - EACH ECU)

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

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

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

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 123

After 10 seconds have elapsed, check if the DTC is output.

Body Electrical > Main Body > Trouble Codes: 50001 123

Result:

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

7.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))

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

Click hereVehicle Exterior>SLIDING ROOF / CONVERTIBLE>SLIDING ROOF HOUSING>REASSEMBLY202304,999999,_59,_080734,_0393074,RM1000000029HGU,

7.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))

Disconnect the 4F driver side junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4F-17 - Body ground	Always	10 kΩ or higher
4F-17 - Other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

8.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - EACH ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - EACH ECU)

Disconnect the 4A driver side junction block assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4A-25 - Body ground	Always	10 kΩ or higher

Disconnect all other connectors in the same circuit.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
4A-25 - Other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

9.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Remove the driver side junction block assembly.

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202304,202502,_57,_080742,_0392832,RM100000002B2HJ,202502,999999,_57,_080742,_0392832,RM100000002RPNZ,

Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

5.646,1.375 6.063,1.625 0.417,0.25 5.646,0.125 6.063,0.375 0.417,0.25 1.958,1 2.375,1.25 0.417,0.25 2.167,2 2.167,1.573 false 0.167,0.083 0.479,0.281 0.313,0.198 10 false *a 2.073,1.052 2.385,1.25 0.313,0.198 10 false MB 5.76,1.417 6.073,1.615 0.313,0.198 10 false 4A 5.771,0.177 6.083,0.375 0.313,0.198 10 false 4F 2.052,2.031 2.365,2.229 0.313,0.198 10 false LIN2

Component without harness connected
(Driver Side Junction Block Assembly)

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

HINT:: This inspection is to check the LIN communication line in the driver side junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

Standard Resistance:

Tester Connection	Condition	Specified Condition
4A-25 or 4F-17 - 4F-3*1	Always	10 kΩ or higher
4A-25 - 4F-3*2	Always	10 kΩ or higher
MB-16 (LIN2) - Other terminals	Always	10 kΩ or higher

*1: w/ Sliding Roof System

*2: w/o Sliding Roof System

Result:

Proceed to
OK
NG

10.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202304,202502,_57,_080742,_0392832,RM100000002B2HJ,202502,999999,_57,_080742,_0392832,RM100000002RPNZ,

10.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Install the main body ECU (multiplex network body ECU) to the driver side junction block assembly.

Connect all driver side junction block assembly connectors other than 4F and 4A.

2.896,3.302 3.25,3.51 0.354,0.208 1.115,1.521 1.469,1.729 0.354,0.208 0.063,0.042 0.375,0.198 0.313,0.156 10 false *a 4.698,0.917 5.01,1.073 0.313,0.156 10 false *b 4.458,2.458 5.146,2.854 0.688,0.396 10 false GND 3,3.323 3.688,3.719 0.688,0.396 10 false 4F 1.208,1.542 1.896,1.938 0.688,0.396 10 false 4A

Component with harness connected
(Driver Side Junction Block Assembly)

Waveform

Using a GTS, check the waveform.

HINT:: This inspection is to check the LIN communication line in the driver side junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

OK:

Tester Connection	Condition	Tool Setting	Specified Condition
4A-25 - Body ground	Ignition switch ON	2 V/DIV., 200 ms/DIV.	Pulse generation (See waveform)
4F-17 - Body ground*	Ignition switch ON	2 V/DIV., 200 ms/DIV.	Pulse generation (See waveform)

*: w/ Sliding Roof System

Result:

Proceed to
OK
NG

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING201906,999999,_V1,_080724,_0393250,RM100000001HWSQ,

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202304,202502,_57,_080742,_0392832,RM100000002B2HJ,202502,999999,_57,_080742,_0392832,RM100000002RPNZ,

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

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	10 kΩ or higher
L7-16 (LIN2) - Other terminals	Always	10 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

Click hereVehicle Exterior>WINDOW / GLASS>POWER WINDOW MASTER SWITCH>REMOVAL201906,999999,_59,_080745,_0392465,RM100000001HQZS,

REPAIR OR REPLACE HARNESS OR CONNECTOR