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HOMESERVICE MANUALSTOYOTA2009SIENNA XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM - SYSTEM & COMPONENT TESTING, ON-VEHICLE INSPECTION, REMOVAL, INSPECTION & INSTALLATIONKNOCK SENSORREMOVAL
2009 Toyota Sienna XLE, FWD

Knock Sensor: Removal

2009 Toyota Sienna XLE, FWDSECTION Removal
  1. DISCHARGE FUEL SYSTEM PRESSURE 

    (See REMOVAL )

  2. REMOVE V-BANK COVER SUB-ASSEMBLY  (See REMOVAL )
  3. DRAIN ENGINE COOLANT  (See REPLACEMENT )
  4. REMOVE WINDSHIELD WIPER MOTOR ASSEMBLY 

    HINT:

    (See OPERATION CHECK )

  5. REMOVE FRONT OUTER COWL TOP PANEL SUB-ASSEMBLY  (See REMOVAL )
  6. REMOVE AIR CLEANER CAP SUB-ASSEMBLY  (See REMOVAL  )
  7. REMOVE AIR CLEANER CASE SUB-ASSEMBLY  (See REMOVAL )
  8. REMOVE INTAKE AIR SURGE TANK ASSEMBLY 
    1. Disconnect the 2 water by-pass hoses from the throttle body [A].
    2. Disconnect the vapor feed hose [B].
    3. Disconnect the throttle body connector and clamp [C].
      Fig 1: Locating Throttle Body Connector And Clamp
      G05136415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the ventilation hose [D].
      5. Fig 2: Locating Ventilation Hose
      G05136416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Disconnect the union to check valve hose [E].
    6. Disconnect the connector [F].
      Fig 3: Locating Connector F
      G04974478Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    7. Using a 5 mm socket hexagon wrench, remove the 4 bolts [G].
    8. Remove the 2 nuts, 2 bolts and intake air surge tank [H].
      9. Fig 4: Locating Intake Air Surge Tank Bolts
      G05136418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Remove the gasket from the intake air surge tank [I].
  9. REMOVE FUEL MAIN TUBE SUB-ASSEMBLY  (See REMOVALDISASSEMBLY )
  10. REMOVE INTAKE MANIFOLD  (See REMOVAL )
  11. REMOVE KNOCK CONTROL SENSOR 
    1. Disconnect the 2 knock sensor connectors.
    2. Remove the 2 bolts and then remove the 2 knock control sensors.
      Fig 5: Locating Knock Sensor Connectors Bolts
      G04973904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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.