B2325

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

DESCRIPTION

The main body ECU (instrument panel junction block) monitors communication between all the ECUs connected to the door bus lines. When the main body ECU (instrument panel junction block) 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.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the sliding roof drive gear sub-assembly (sliding roof control ECU) is replaced or removed and reinstalled, it requires initialization Initialization.
* When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization Programming and Relearning.
* When using the Techstream to troubleshoot with the engine 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 (MASTER SWITCH - DRIVER SIDE POWER WINDOW REGULATOR MOTOR)

(a) Disconnect the I5 switch connector.





(b) Disconnect the I4 motor connector.

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

Standard Resistance:





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

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - EACH ECU)

(a) Disconnect the E59 and Q7 ECU connectors.





(b) Disconnect the H5, J3 and K3 motor connectors.

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

Standard Resistance:





Standard Voltage:





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

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

(a) Reconnect the E59 and Q7 ECU connectors.

(b) Reconnect the H5, J3 and K3 motor connectors.

(c) Reconnect the I5 switch connector.

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

(e) Recheck for DTCs.

Result:





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

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

(a) Reconnect the I4 motor connector.

(b) Disconnect the H5 motor connector.

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

(d) Recheck for DTCs.

Result:





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

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

(a) Reconnect the H5 motor connector.

(b) Disconnect the J3 motor connector.

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

(d) Recheck for DTCs.

Result:





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

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

(a) Reconnect the J3 motor connector.

(b) Disconnect the K3 motor connector.

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

(d) Recheck for DTCs.

Result:





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

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

(a) Reconnect the K3 motor connector.

(b) Disconnect the I5 switch connector.

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

(d) Recheck for DTCs.

Result:





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

8. CHECK DTC OUTPUT (SLIDING ROOF CONTROL ECU)

(a) Reconnect the I5 switch connector.

(b) Disconnect the Q7 ECU connector.

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

(d) Recheck for DTCs.

Result:





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

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

A -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)