2004 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Knock Sensor, Intake Manifold (3MZ-FE): Replacement

  1. DISCHARGE FUEL SYSTEM PRESSURE (See  FUEL SYSTEM (3MZ-FE)  ) 
  2. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL) 
  3. DRAIN ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  4. REMOVE FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS) (See  REPLACEMENT  ) 
  5. REMOVE V-BANK COVER SUB-ASSY (See  REPLACEMENT  ) 
  6. REMOVE AIR CLEANER CAP SUB-ASSY (See  REPLACEMENT  ) 
  7. REMOVE EMISSION CONTROL VALVE SET (See  FUEL INJECTOR ASSY (3MZ-FE)  ) 
  8. REMOVE INTAKE AIR SURGE TANK (See  FUEL INJECTOR ASSY (3MZ-FE)  ) 
  9. REMOVE ENGINE MOVING CONTROL ROD 
    1. Remove the pipe from the clamp.
    2. Remove the 4 bolts, then remove the engine moving control rod and setting condenser
    Fig 1: Removing Engine Moving Control Rod
    G00960245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE INTAKE MANIFOLD 
    1. Disconnect the fuel pipe No. 1
      1. Remove the fuel pipe clamp.
      2. Pinch the tube connector, then pull out the fuel pipe No. 1
      NOTE:
      • Check around the quick connector for dirt or mud before this operation. Remove the dirt if necessary.
      • Be careful of mud because the quick connector has an O-ring which seals the pipe and quick connector that can be contaminated.
      • Do not use any tools in this operation.
      • Do not bend or twist the nylon tube. Protect the quick connector by covering it with a vinyl or plastic bag
      • When the pipe and quick connector are stuck, push and pull the quick connector to release and pull the quick connector out carefully.
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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