LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2287

DTC Code DTC Name
B2287 LIN Communication Master Malfunction

DESCRIPTION

This DTC is stored when there is an open or short circuit, or ECU communication malfunction between the power management control ECU and certification ECU.

DTC Code DTC Detection Condition Trouble Area
B2287 There is an open or short circuit, or ECU communication malfunction between the power management control ECU and certification ECU.

  • Certification ECU

  • Power management control ECU

  • Harness or connector

WIRING DIAGRAM

A01ITX1E50

INSPECTION PROCEDURE

Note


  • When using the intelligent tester with the ignition switch off to troubleshoot:

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

  • Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

Tech Tips

When DTC B2287 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first Click here.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B2287 is output A
      DTC B2287 is not output B

    B

    USE SIMULATION METHOD TO CHECK Click here

    A

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER MANAGEMENT CONTROL ECU)


    1. A01ITDTE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU)
      *2

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the H51 and H71 ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H51-29 (LIN) - H71-24 (LIN2) Always Below 1 Ω
      H51-29 (LIN) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)


    1. A01IP3VE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the H51 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H51-15 (E) - Body ground Always Below 1 Ω
      Standard Voltage
      Tester Connection Condition Specified Condition
      H51-1 (+B) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. REPLACE CERTIFICATION ECU


    1. Temporarily replace the certification ECU with a new one.

    2. Clear the DTCs Click here.


    NEXT

  6. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B2287 is not output A
      DTC B2287 is output (for LHD) B
      DTC B2287 is output (for RHD) C

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    A

    END (CERTIFICATION ECU IS DEFECTIVE)