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HOMESERVICE MANUALSTOYOTA2009CAMRY HYBRIDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERSTARTING SYSTEM (HYBRID)SMART KEY SYSTEMDTC B2287 LIN COMMUNICATION MASTER MALFUNCTIONINSPECTION PROCEDURE
2009 Toyota Camry Hybrid

Inspection Procedure

2009 Toyota Camry HybridSECTION Inspection Procedure
  1. CHECK FOR DTCS 
    1. Delete the DTCs (See DTC CHECK / CLEAR ).
    2. Check for DTC B2287 and B2785.

    Result 

    RESULT REFERENCE

    Display (DTC output) Proceed to
    "DTC B2287" only A
    "DTC B2287" and "DTC B2785" B
    No DTC C

    HINT:

    If DTC B2785 is output, perform troubleshooting for DTC B2785 first (See DTC B2785 COMMUNICATION MALFUNCTION BETWEEN ECUS CONNECTED BY LIN ).

    B:  Go to DTC B2785

    C: CHECK INTERMITTENT PROBLEMS 

    A: Go to Next Step 

  2. CHECK WIRE HARNESS (MAIN BODY ECU - CERTIFICATION ECU) 
    1. Disconnect the E58 and IR ECU connectors.
      Fig 1: Identifying Wire Harness (Main Body ECU - Certification ECU)
      G05618531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

    Standard resistance 

    RESISTANCE SPECIFICATION

    Tester Connection (Symbols) Condition Specified Condition
    IR-9 (LIN1) - E58-10 (LIN) Always Below 1 Ω
    IR-9 (LIN1) or E58-10 (LIN) - Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. CHECK MAIN BODY ECU OPERATION 
    1. After replacing the main body ECU with a normally functioning ECU, check the power source mode change.
      1. When the key is inside the vehicle, the brake pedal is depressed and the shift lever is in P, check that pressing the power switch causes the power source mode to change to on (READY).

      OK: 

      Power switch on (READY). 

      NG: REPLACE CERTIFICATION ECU 

      OK: END (MAIN BODY ECU DEFECTIVE) 

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.