DTC B2287: LIN Communication Master Malfunction: Procedure

1. Delete the DTC. Refer to DTC CHECK / CLEAR .
2. Check for DTC B2285 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. Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN; DTC B2786: No Response from Steering Lock ECU; DTC B2789: No Response from ID BOX .

B → GO TO DTC CHART 

C → CHECK INTERMITTENT PROBLEMS 

A: Go to next step 

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: Go to next step 

1. Disconnect the J55 ECU connector.
   Fig 1: Identifying P33 Certification ECU Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the P33 ECU connector.
3. 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