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.





* *: w/ Sliding Roof System

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it requires initialization Initialization.
* When the power window regulator motor assembly (for driver side) 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.
* *: w/ Sliding Roof System

PROCEDURE

1. 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





(d) Install the the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

(e) Install the instrument panel junction block assembly Installation.

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

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

(a) Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.

(b) Disconnect the K9 power window regulator motor (for driver side) connector.

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

Standard Resistance:





*: w/ Sliding Roof System

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 3B instrument panel junction block assembly connector.

(b) Reconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) 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.

*: w/ Sliding Roof System

Result:





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

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

4. CHECK DTC OUTPUT (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY))

(a) Reconnect the K9 power window regulator motor (for driver side) connector.

(b) Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) 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) Disassembly

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