Dtc B2287 Lin Communication Master Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CLEAR DTC

CHECK FOR DTC

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

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

REPLACE POWER MANAGEMENT CONTROL ECU

CLEAR DTC

CHECK FOR DTC

DTC B2287 LIN Communication Master Malfunction

DTC B278C Lost Communication with Power Source Control


DESCRIPTION

  1. DTC B2287 is stored when there is an open or short circuit or an ECU communication malfunction between the power management control ECU and certification ECU.
  2. DTC B278C is stored when LIN communication between the certification ECU and power management control ECU stops for 10 seconds or more.

DTC Code
DTC Detection Condition
Trouble Area
B2287
There is an open or short circuit or an ECU communication malfunction between the power management control ECU and certification ECU.
  1. Certification ECU
  2. Power management control ECU
  3. Harness or connector
B278C
No communication between the certification ECU and power management control ECU for 10 seconds or more.
  1. Certification ECU
  2. Power management control ECU
  3. Harness or connector

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2287 Lin Communication Master Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. 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.
  2. Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.
HINT:
When DTC B2287 and B2785 are output simultaneously, perform troubleshooting for DTC B2785 first (LandCruiser RM000002XHV0ACX.html).
1.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


2.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2287 or B278C is not output.


NG
Go to step 3
OK

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)

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

  1. Disconnect the G38 certification ECU connector.

  1. Disconnect the G51 power management control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G38-29 (LIN) - G51-24 (LIN2)
    		Always
    		Below 1 Ω
    G38-29 (LIN) or G51-24 (LIN2) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Networking.Lin Communication System. Dtc B2287 Lin Communication Master Malfunction

  1. Disconnect the G51 power management control ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G51-5 (GND2) - Body ground
    		Always
    		Below 1 Ω
    G51-6 (GND) - Body ground
    		Always
    		Below 1 Ω

  1. Measure the voltage according to the value(s) in the table below.

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G51-1 (AM22) - Body ground
    		Always
    		11 to 14 V
    G51-2 (AM21) - Body ground
    		Always
    		11 to 14 V
Text in Illustration
*a
Rear view of wire harness connector
(to Power Management Control ECU)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE POWER MANAGEMENT CONTROL ECU

  1. Temporarily replace the power management control ECU with a new or normally functioning one (LandCruiser RM0000039R5026X.html).


NEXT


6.CLEAR DTC

  1. Clear the DTCs (LandCruiser RM000002S8D045X.html).


NEXT


7.CHECK FOR DTC

  1. Check for DTCs (LandCruiser RM000002S8D045X.html).

    OK:
    DTC B2287 or B278C is not output.


NG
REPLACE CERTIFICATION ECU
OK

END (POWER MANAGEMENT CONTROL ECU IS DEFECTIVE)