2004 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature (ECT) Sensor: Inspection

  1. DRAIN ENGINE COOLANT 
  2. REMOVE V-BANK COVER 
  3. REMOVE INTAKE AIR CONNECTOR 
  4. DISCONNECT THROTTLE BODY FROM INTAKE MANIFOLDS (See  REMOVAL   ) 
  5. REMOVE ECT SENSOR 
    1. Disconnect the ECT sensor connector.
    2. Remove the ECT sensor and the gasket.
      Fig 1: Disconnecting ECT Sensor Connector
      G03076939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT ECT SENSOR 

    Using an ohmmeter, measure the resistance between the terminals.

    Resistance: Refer to the graph 

    If the resistance is not as specified, replace the ECT sensor.

  7. REINSTALL ECT SENSOR 
    1. Install a new gasket and the ECT sensor.

      Torque: 20.4 N.m (208 kgf.cm, 15 ft.lbf) 

    2. Connect the ECT sensor connector.
  8. REINSTALL THROTTLE BODY TO INTAKE MANIFOLDS 

    Install a new gasket and the throttle body with the 2 bolts and 2 nuts.

    Torque: 18 N.m (185 kgf.cm, 13 ft.lbf) 

  9. REINSTALL INTAKE AIR CONNECTOR 
  10. REFILL WITH ENGINE COOLANT (See  REPLACEMENT  ) 
  11. REINSTALL V-BANK COVER 
    Fig 2: Measuring Resistance Between Terminals
    G03076940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.

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