2008 Scion xD AutomaticFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

  1. DISCHARGE FUEL SYSTEM PRESSURE 

    (See PRECAUTION )

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
  3. REMOVE ENGINE UNDER COVER LH 
  4. REMOVE ENGINE UNDER COVER RH 
  5. DRAIN ENGINE COOLANT  (See REPLACEMENT )
  6. REMOVE NO. 2 CYLINDER HEAD COVER  (See REMOVAL )
  7. REMOVE AIR CLEANER CAP SUB - ASSEMBLY WITH HOSE  (See REMOVAL  )
  8. SEPARATE ENGINE WIRE HARNESS  (See REMOVAL )
  9. REMOVE HARNESS BRACKET  (See REMOVAL )
  10. DISCONNECT NO. 1 FUEL VAPOR FEED HOSE  (See REMOVAL )
  11. DISCONNECT VACUUM HOSE  (See REMOVAL )
  12. REMOVE FUEL PIPE CLAMP  (See REMOVAL )
  13. DISCONNECT FUEL TUBE SUB - ASSEMBLY  (See REMOVAL )
  14. REMOVE FUEL DELIVERY PIPE SUB - ASSEMBLY  (See REMOVAL )
  15. REMOVE NO. 1 DELIVERY PIPE SPACER  (See REMOVAL )
  16. REMOVE INJECTOR VIBRATION INSULATOR  (See REMOVAL )
  17. REMOVE STARTER ASSEMBLY  (See REMOVAL )
  18. REMOVE ENGINE OIL LEVEL DIPSTICK 
  19. REMOVE OIL COOLER TUBE (for Automatic Transaxle)  (See REMOVAL )
  20. REMOVE TRANSMISSION OIL LEVEL GAUGE SUB - ASSEMBLY (for Automatic Transaxle)  (See REMOVAL )
  21. REMOVE INTAKE MANIFOLD 
    1. Disconnect the 4 wire harness clamps.
      Fig 1: Locating Wire Harness Clamps
      G05398784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the ventilation hose.
      Fig 2: Locating Ventilation Hose
      G05398785Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the throttle body connector.
      Fig 3: Locating Throttle Body Connector
      G05398730Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the water by-pass hose and No. 2 water by-pass hose.
      Fig 4: Locating Water By-Pass Hoses
      G05398731Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Remove the 4 bolts and 2 nuts and remove the intake manifold and intake manifold stay.
      Fig 5: Locating Intake Manifold Bolts And Nuts
      G05398788Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. REMOVE KNOCK SENSOR 
    1. Disconnect the knock sensor connector.
      2. Fig 6: Locating Knock Sensor Bolt And Knock Sensor Connector
      G05398789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and remove the knock sensor.
Factory Service Tools

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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.

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