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HOMESERVICE MANUALSTOYOTA2009SEQUOIA LIMITED, 5.7 Y, RWDREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSTHEFT DETERRENT & KEYLESS ENTRYTHEFT DETERRENT SYSTEMECU POWER SOURCE CIRCUITINSPECTION PROCEDURE
2009 Toyota Sequoia Limited, 5.7 Y, RWD

Inspection Procedure

2009 Toyota Sequoia Limited, 5.7 Y, RWDSECTION Inspection Procedure
  1. CHECK MAIN BODY ECU (POWER SOURCE) 
    1. Disconnect the DA and DB main body ECU connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

      VOLTAGE SPECIFICATION

      Tester Connection Condition Specified Condition
      DA-1 - Body ground Always 11 to 14 V
      DB-13 - Body ground Always 11 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 1: Identifying Main Body ECU Connector Terminals
    G05653345Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BODY GROUND) 
    1. Disconnect the DD main body ECU connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      DD-62 - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Fig 2: Identifying Main Body ECU Connector Terminals
    G05653346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

RENDER: 1.0x

NO RELATED

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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.