2009 Toyota Avalon LimitedFACTORY OEM SERVICE PROCEDURE

Knock Sensor: Removal

  1. PREVENT GASOLINE FROM SPILLING OUT 
  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE: When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See INITIALIZATION ).
  3. DRAIN ENGINE COOLANT  (See REPLACEMENT )
  4. REMOVE WINDSHIELD WIPER MOTOR & LINK ASSEMBLY  (See REMOVAL )
  5. REMOVE COWL TOP PANEL OUTER  (See REMOVAL )
  6. REMOVE V-BANK COVER SUB-ASSEMBLY  (See REMOVAL )
  7. REMOVE AIR CLEANER CAP WITH AIR CLEANER HOSE  (See REMOVAL )
  8. REMOVE INTAKE AIR SURGE TANK  (See REMOVAL )
  9. REMOVE INTAKE MANIFOLD 
  10. REMOVE KNOCK CONTROL SENSOR 
    1. Disconnect the 2 knock control sensor connectors.
    2. Remove the 2 bolts and 2 knock control sensors.
      Fig 1: Locating Knock Control Sensor Connectors And Mounting Bolts
      G04973904Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.