Up to 08/2009

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.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When the sliding roof ECU (sliding roof drive gear assembly) 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 Initialization.
* 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. 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
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

(a) Disconnect the L2, T2, J7, K2, J1 and I2 connectors.





(b) 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.

3. CHECK DTC OUTPUT (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH)

(a) Reconnect the 2H, 2D, T2, J7, K2, J1 and I2 connectors.

(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 REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Removal
A -- Continue to next step.

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

(a) Reconnect the L2 connector.

(b) Disconnect the T2 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 ASSEMBLY) Removal
A -- Continue to next step.

5. CHECK DTC OUTPUT (MULTIPLEX NETWORK MASTER SWITCH)

(a) Reconnect the T2 connector.

(b) Disconnect the J7 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.

6. CHECK DTC OUTPUT (REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)

(a) Reconnect the J7 connector.

(b) Disconnect the K2 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 REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Removal
A -- Continue to next step.

7. CHECK DTC OUTPUT (FRONT POWER WINDOW REGULATOR MOTOR LH)

(a) Reconnect the K2 connector.

(b) Disconnect the J1 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 FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH Removal
A -- Continue to next step.

8. CHECK DTC OUTPUT (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH)

(a) Reconnect the J1 connector.

(b) Disconnect the I2 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 FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH Removal

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