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).

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	Power source control ECU Certification ECU Wire harness or connector

Dtc B2287 Lin Communication Master Malfunction. 4GR-FSE STARTING. Lexus IS250 IS220d GSE20 ALE20

Dtc B2287 Lin Communication Master Malfunction. 4GR-FSE STARTING. Lexus IS250 IS220d GSE20 ALE20

1.CHECK FOR DTCS

Delete the DTC .

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

GO TO DTC CHART

CHECK INTERMITTENT PROBLEMS

A

2.CHECK CONNECTORS

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.

REPAIR OR REPLACE CONNECTORS

OK

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

Disconnect the J55 ECU connector.

Disconnect the P33 ECU connector.

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

REPLACE POWER SOURCE CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

LEXUS IS250, IS220d / GSE20 ALE20