DTC B2287 LIN Communication Master Malfunction

DESCRIPTION

This DTC is stored there is an open, short or ECU communication malfunction between the main body ECU (cowl side junction block LH) and certification ECU (smart key ECU assembly).

DTC Code	DTC Detection Condition	Trouble Area
B2287	There is an open, short or ECU communication malfunction between the main body ECU (cowl side junction block LH) and certification ECU (smart key ECU assembly).	Certification ECU (smart key ECU assembly) Main body ECU (cowl side junction block LH) Harness or connector

WIRING DIAGRAM

Dtc B2287 Lin Communication Master Malfunction. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

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

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

HINT:

When DTC B2287 and B2785 are output simultaneously, perform the troubleshooting for DTC B2785 first ().

1.CLEAR DTC

Clear the DTC ().

NEXT

2.CHECK FOR DTC

Recheck for DTCs ().

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

B

USE SIMULATION METHOD TO CHECK ()

A

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

Dtc B2287 Lin Communication Master Malfunction. NETWORKING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E29 and 2D ECU connectors.

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

Standard Resistance:
Tester Connection Condition Specified Condition
E29-10 (LIN) - 2D-20 (LIN1) Always Below 1 Ω
E29-10 (LIN) or 2D-20 (LIN1) - Body ground Always 10 kΩ or higher

Standard Voltage:
Tester Connection Condition Specified Condition
E29-10 (LIN) or 2D-20 (LIN1) - Body ground Always Below 1 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

Temporarily replace the main body ECU (cowl side junction block LH) with a new or normally functioning one.

Clear the DTC ().

NEXT

5.CHECK FOR DTC

Recheck for DTCs ().

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

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

A

END (MAIN BODY ECU IS DEFECTIVE)

NETWORKING

Land Cruiser URJ200 URJ202 GRJ200 VDJ200

LIN COMMUNICATION SYSTEM

Tester Connection	Condition	Specified Condition
E29-10 (LIN) - 2D-20 (LIN1)	Always	Below 1 Ω
E29-10 (LIN) or 2D-20 (LIN1) - Body ground	Always	10 kΩ or higher