B2287

MULTIPLEX COMMUNICATION: LIN COMMUNICATION SYSTEM: B2287: LIN Communication Master Malfunction
B2287 - LIN Communication Master Malfunction

DESCRIPTION

This DTC is output there is an open, short or ECU communication malfunction between the main body ECU and certification ECU.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When using the Techstream with the power 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 B2287 and B2785 are output simultaneously, perform the troubleshooting for DTC B2785 first B2785.

PROCEDURE

1. CLEAR DTC

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

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
A -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - MAIN BODY ECU)





(a) Disconnect the L15 and DA ECU connectors.

(b) 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

(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) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- REPLACE CERTIFICATION ECU

A -- END (MAIN BODY ECU IS DEFECTIVE)