Dtc B2287 Lin Communication Master Malfunction

Engine. Lexus Is250, Is220D. Gse20 Ale20
4Gr-Fse Starting. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTCS

CHECK CONNECTORS

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - CERTIFICATION ECU)

DTC B2287 LIN Communication Master Malfunction


DESCRIPTION

This DTC is output when there is a LIN communication problem between the power source control ECU and smart key ECU (certification ECU).
HINT:
When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

DTC No.
DTC Detection Condition
Trouble Area
B2287
Communication or communication line is abnormal between the power source control ECU and the certification ECU
  1. Power source control ECU
  2. Certification ECU
  3. Wire harness or connector

Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2287 Lin Communication Master Malfunction


WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2287 Lin Communication Master Malfunction


INSPECTION PROCEDURE

1.CHECK FOR DTCS

  1. Delete the DTC (Click here).

  1. Check for DTC B2287 and B2785.

    Result:

    Display (DTC output)
    		Proceed to
    "DTC B2287" only
    		A
    "DTC B2287" and "DTC B2785" are output
    		B
    No DTC is outpu.
    		C
    HINT:
    If DTC B2785 is output, perform troubleshooting for DTC B2785 first (Click here).


B
GO TO DTC CHART

C
CHECK INTERMITTENT PROBLEMS
A


2.CHECK CONNECTORS

  1. Check that the connectors are securely connected and the terminals are not deformed or loose.

    OK:
    The connectors are securely connected and the terminals are not deformed or loose.


NG
REPAIR OR REPLACE CONNECTORS
OK


3.CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - CERTIFICATION ECU)


    Lexus Is250, Is220D. Gse20 Ale20.4Gr-Fse Starting.Starting System. Dtc B2287 Lin Communication Master Malfunction

  1. Disconnect the J55 ECU connector.

  1. Disconnect the P33 ECU connector.

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

    Standard resistance:
    Tester Connection (Symbols)
    		Condition
    		Specified Condition
    J55-30 (LIN1) - P33-10 (LIN)
    		Always
    		Below 1 Ω
    J55-30 (LIN1) or P33-10 (LIN) - Body ground
    		Always
    		10 kΩ or higher


OK
REPLACE POWER SOURCE CONTROL ECU
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR