2009 Scion tC AutomaticFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

  1. DISCHARGE FUEL SYSTEM PRESSURE  (See REMOVAL )
  2. DRAIN COOLANT  (See ON-VEHICLE INSPECTION )
  3. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
  4. REMOVE FRONT WIPER ARM HEAD CAP  (See REMOVAL )
  5. REMOVE FRONT WIPER ARM LH  (See REMOVAL )
  6. REMOVE FRONT WIPER ARM RH  (See REMOVAL )
  7. REMOVE HOOD TO COWL TOP SEAL  (See REMOVAL )
  8. REMOVE COWL TOP VENTILATOR LOUVER LH  (See REMOVAL )
  9. REMOVE WIPER LINK  (See REMOVAL )
  10. REMOVE COWL TOP PANEL OUTER 
    1. Remove the wire harness clamp.
    2. Remove the 7 bolts and panel.
    Fig 1: Locating Bolts And Panel
    G05539248Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE COWL BODY MOUNTING BRACKET LOWER LH 
    1. Remove the bolt, clip and bracket.
  12. REMOVE ENGINE COVER  (See ON-VEHICLE INSPECTION )
  13. REMOVE AIR CLEANER CAP  (See REMOVAL )
  14. REMOVE THROTTLE BODY  (See REMOVAL )
  15. REMOVE FUEL DELIVERY PIPE  (See REMOVAL )
    Fig 2: Locating Bolt, Clip And Bracket
    G05539249Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. REMOVE FUEL TUBE 
    1. Remove the fuel tube clamp.
    2. Pinch the retainer as illustrated, and then pull the fuel tube connector out of the pipe.
      NOTE:
      • Remove any dirt and foreign objects on the fuel tube connector before performing this work.
        Fig 3: Identifying Fuel Tube Clamp
        G05539250Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      • When disconnecting the connector, do not damage the connector and pipe, and do not allow foreign matter to contact the connector and pipe. Damage or foreign matter may damage the O-ring that seals the pipe and lead to leaks.
      • Perform this work by hand. Do not use any tools.
      • Do not forcibly bend, twist or turn the nylon tube.
      • Protect the disconnected part by covering it with a plastic bag after disconnecting the fuel tube.
      • If the fuel tube connector and pipe are stuck, push and pull to release them.
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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