B2325

NETWORKING: LIN COMMUNICATION SYSTEM: B2325: LIN Communication Bus Malfunction
B2325 - LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU (multiplex network body ECU) monitors communication between all the ECUs connected to the door bus lines. When the main body ECU (multiplex network body ECU) detects errors in communication with all the ECUs connected to the door bus lines at 2.6-second intervals and 3 times in a row, DTC B2325 will be stored.





* *1: w/ Moonroof with Solar Panel

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the sliding roof ECU (sliding roof drive gear assembly) is replaced or removed and reinstalled, it requires initialization Programming and Relearning.
* When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization Initialization.
* When using the Techstream to troubleshoot with the power switch off:
Connect the Techstream to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR (DRIVER SIDE) - MASTER SWITCH)

(a) Disconnect the O6 multiplex network master switch connector.





(b) Disconnect the O2 power window regulator motor (for driver side) connector.

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

Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Remove the multiplex network master switch assembly Removal.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Removal
OK -- Continue to next step.

3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly Removal.





(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

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

Standard Resistance:





Text in Illustration





NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (INSTRUMENT JUNCTION BLOCK - EACH ECU)





(a) Disconnect the R23*1, N2, P4 and Q4 connectors.

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

Standard Resistance:





*1 w/ Moonroof with Solar Panel

Text in Illustration





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR LH SIDE))

(a) Reconnect the O6, 2A, 2D, R23*1, P4, O2 and N2 connectors.

*1: w/ Moonroof with Solar Panel

(b) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(c) After 10 seconds have elapsed, check if the trouble occurs again.

(d) Check for DTCs again.

Result:





B -- REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR LH SIDE) Removal
A -- Continue to next step.

6. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY)

(a) Reconnect the Q4 connector.

(b) Disconnect the O6 connector.

(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(d) After 10 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

Result:





B -- REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Removal
A -- Continue to next step.

7. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR RH SIDE))

(a) Reconnect the O6 connector.

(b) Disconnect the P4 connector.

(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(d) After 10 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

Result:





B -- REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for REAR RH SIDE) Removal
A -- Continue to next step.

8. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE))

(a) Reconnect the P4 connector.

(b) Disconnect the O2 connector.

(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(d) After 10 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

Result:





B -- REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for DRIVER SIDE) Removal
A -- Continue to next step.

9. CHECK DTC OUTPUT (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE))

(a) Reconnect the O2 connector.

(b) Disconnect the N2 connector.

(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(d) After 10 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

Result:





B -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

C -- REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for FRONT PASSENGER SIDE) Removal
A -- Continue to next step.

10. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY))

(a) Reconnect the N2 connector.

(b) Disconnect the R23 connector.

(c) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(d) After 10 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

Result:





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

A -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal