2004 Toyota Sienna LE, FWDFACTORY OEM SERVICE PROCEDURE

Service Data

Engine Control System Service Data

Throttle body    
  Standard throttle valve opening percentage 60 % or more
Accelerator pedal position sensor    
  Standard voltage 0.6 to 1.0 V
Intake air flow meter assy    
Resistance 4 (THA) - 5 (E2)  
  at -20°C (-4°F) 13.6 to 18.4 kΩ
  at 20°C (68°F) 2.21 to 2.69 kΩ
  at 60°C (140°F) 0.493 to 0.667 kΩ
Camshaft timing oil control valve assy    
Resistance as 20°C (68°F) 6.9 to 7.9 Ω
Accelerator pedal rod assy    
Resistance 3 (VPA2) - 5 (EP1) 5.0 kΩ or less
  6 (VPA1) - 2 (EP2) 5.0 kΩ or less
  4 (VCP1) - 5 (EP1) 2.25 to 4.75 kΩ
  1 (VCP2) - 2 (EP2) 2.25 to 4.75 kΩ
Throttle body assy    
Resistance 2 (M+) - 1 (M-)  
  at 20°C (68°F) 0.3 to 100 kΩ
E.F.I, engine coolant temperature sensor    
Resistance Approx. 20°C (68°F) 2.32 to 2.59 kΩ
  Approx. 80°C (176°F) 0.310 to 0.326 kΩ
Knock sensor    
Resistance at 20°C (68°F) 120 to 280 kΩ
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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