2013 Toyota Prius ThreeFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

  1. INSPECT THROTTLE BODY ASSEMBLY 
    1. Check for throttle control motor operating sound.
      1. Turn the power switch on (IG).
      2. When depressing the accelerator pedal, check the operating sound of the motor. Make sure that no friction noises are emitted from the motor. If any friction noise exists, replace the throttle body assembly.
    2. Set the vehicle to the inspection mode. Refer to INSPECTION MODE PROCEDURE .
    3. Start the engine and check that the MIL is not illuminated. After the engine is warmed up, check that the idle speed is within the specified range when the A/C is switched off.

      Standard

      Condition Engine Idle Speed
      A/C switched off 950 to 1050 RPM
      NOTE:
      • Be sure to perform this step with all accessories off.
      • Make sure that park (P) is selected.
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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