LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Networking >> Lin Communication System >> DTC B2287 LIN Communication Master Malfunction >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

NOTE:
  • If the certification ECU (smart key ECU assembly) is replaced, register the key (See REGISTRATION ).
  1. CHECK FOR DTC 
    1. Clear the DTC (See DIAGNOSIS SYSTEM  ).
    2. Recheck for DTC.

      OK: B2287 is not output. 

    NG: Go to step 2 

    OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER SOURCE CONTROL ECU) 
    1. Disconnect the P33 and J55 connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE REFERENCE

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

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      P33-10 (LIN) - Body ground Always Below 1 V
      3. Fig 1: Identifying P33 And J55 Connector Terminal
      G05754096Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. REPLACE POWER SOURCE CONTROL ECU 
    1. Replace the power source control ECU.
  4. CHECK FOR DTC 
    1. Clear the DTC (See DIAGNOSIS SYSTEM  ).
    2. Recheck for DTC.

      OK: B2287 is not output. 

    NG: REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)  (See REMOVAL )

    OK: END (POWER SOURCE CONTROL ECU IS DEFECTIVE) 

scientia non olet · About LEMON Manuals