2005 Scion tC AutomaticFACTORY OEM SERVICE PROCEDURE

Knock Sensor, Intake Manifold (2AZ-FE): Replacement

NOTE: When disconnecting the battery terminal, initialize the following system after the terminal is reconnected.
SYSTEM SPECIFICATIONS

System Refer To
Power window control system INITIALIZATION
Sliding roof system INITIALIZATION
  1. DISCHARGE FUEL SYSTEM PRESSURE (see  FUEL - FUEL SYSTEM (2AZ-FE)  ) 
  2. DRAIN ENGINE COOLANT (see  ENGINE COOLANT (2AZ-FE)  ) 
  3. DISCONNECT BATTERY NEGATIVE TERMINAL 
  4. REMOVE FRONT WIPER ARM HEAD CAP (see  WINDSHIELD WIPER MOTOR ASSY  ) 
  5. REMOVE FR WIPER ARM LH (see  WINDSHIELD WIPER MOTOR ASSY  ) 
  6. REMOVE FR WIPER ARM RH (See  WINDSHIELD WIPER MOTOR ASSY  ) 
  7. REMOVE HOOD TO COWL TOP SEAL (See  WINDSHIELD WIPER MOTOR ASSY  ) 
  8. REMOVE COWL TOP VENTILATOR LOUVER LH (See  WINDSHIELD WIPER MOTOR ASSY  ) 
  9. REMOVE WIPER LINK ASSY (See  WINDSHIELD WIPER MOTOR ASSY  ) 
  10. REMOVE COWL TOP PANEL SUB-ASSY OUTER 
    1. Remove the wire harness clamp.
    2. Remove the 7 bolts, then remove the cowl top panel outer.
      Fig 1: Removing Cowl Top Panel Sub-Assy Outer
      G03072158Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE COWL BODY MOUNTING BRACKET LOWER LH 
    1. Remove the bolt and clip, then remove cowl body mounting bracket lower.
      Fig 2: Removing Cowl Body Mounting Bracket Lower LH
      G03072159Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. REMOVE ENGINE COVER SUB-ASSY NO.1 (SEE  REPLACEMENT   ) 
  13. REMOVE AIR CLEANER CAP SUB-ASSY (SEE  REPLACEMENT   ) 
  14. REMOVE THROTTLE BODY ASSY (SEE  REPLACEMENT   ) 
  15. REMOVE FUEL DELIVERY PIPE SUB-ASSY (SEE  FUEL INJECTOR ASSY (2AZ-FE)  ) 
  16. REMOVE FUEL TUBE SUB-ASSY 
    1. Remove the fuel pipe clamp No. 1.
    2. Pinch the retainer as illustrated in Fig 3, then pull the fuel tube connector out of the pipe.
      Fig 3: Removing Fuel Tube Sub-Assy
      G03072160Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • Remove any dirt and foreign objects on the fuel tube connector before performing this work.
    • Do not allow any scratches or foreign objects on the parts when disconnecting, as the fuel tube connector has the O-ring that the seals the pipe.
    • 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 vinyl 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.