ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:B2287

DTC Code DTC Name
B2287 LIN Communication Master Malfunction

DESCRIPTION

This DTC is stored when a malfunction of the LIN communication between the power management control ECU and certification ECU is detected.

Tip:

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC Code

DTC Detection Condition

Trouble Area

B2287

LIN communication between the power management control ECU and certification ECU is malfunctioning.

  • AM2 NO. 2 fuse

  • LIN communication line

  • Power management control ECU

  • Certification ECU

  • Harness or connector

WIRING DIAGRAM

A207499E07

CAUTION / NOTICE / HINT

Note:

  • When using the intelligent tester with the engine 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 for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK FOR DTC

    1. Clear the DTCs (Click here).

    2. Check for DTCs of the power management control ECU (B2287) (Click here).

    3. Check for DTCs of the certification ECU (B2785) (Click here).

      Table 1. Result

      Result

      Proceed to

      No DTC output

      A

      B2287 and B2785 are output

      B

      B2785 is not output but B2287 is output

      C

    USE SIMULATION METHOD TO CHECK

    (Click here)

    GO TO LIN COMMUNICATION SYSTEM (DTC B2785)

    (Click here)

  2. CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU)

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    1. Disconnect the H71 power management control ECU connector.

      U122691E02
      Table 2. Text in Illustration

      *1

      Rear view of wire harness connector

      (to Power Management Control ECU)

      *2

      Rear view of wire harness connector

      (to Certification ECU)

    2. Disconnect the H51 certification ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H71-24 (LIN2) - H51-29 (LIN)

      Always

      Below 1 Ω

      H71-24 (LIN2) - Body ground

      Always

      10 kΩ or higher
      Table 3. Result

      Result

      Proceed to

      OK (for LHD)

      A

      OK (for RHD)

      B

      NG

      C

    REPLACE POWER MANAGEMENT CONTROL ECU

    (Click here)

    REPLACE POWER MANAGEMENT CONTROL ECU

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR