B2325

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

DTC B2325 - LIN Communication Bus Malfunction

DESCRIPTION

The main body ECU intermittently monitors the LIN communication bus between the components related to the door and sliding roof. DTC B2325 is output when a malfunction in the LIN communication bus between the components related to sliding roof is detected consecutively 3 times.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTE: When using the Techstream with the ignition switch OFF to troubleshoot:

Connect the Techstream to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the tester and vehicle begins.

HINT: When DTC B2325 and a LIN communication stop DTC are output simultaneously, first perform the troubleshooting for the LIN communication stop DTC. Then perform the troubleshooting for DTC B2325.

PROCEDURE

1. CLEAR DTC
(a) Clear the DTC (Reading and Clearing Diagnostic Trouble Codes).
NEXT -- Continue to next step.
2. CHECK FOR DTC
(a) Check for DTC (Reading and Clearing Diagnostic Trouble Codes).

Result:





C -- USE SIMULATION METHOD TO CHECK
B -- GO TO DTC B1273
A -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SLIDING ROOF DRIVE GEAR)





(a) Disconnect the J2 ECU connector.
(b) Disconnect the W3 gear connector.
(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.
4. REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)
(a) Temporarily replace the main body ECU with a new or normally functioning one.
(b) Clear the DTC (Reading and Clearing Diagnostic Trouble Codes).
NEXT -- Continue to next step.
5. CHECK FOR DTC
(a) Check for DTC (Reading and Clearing Diagnostic Trouble Codes).

Result:





B -- REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY
A -- END