2007 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE

On-Vehicle Inspection

NOTE:
  • Perform the MAF meter inspection according to the procedures below.
  • Only replace the MAF meter when both the LONG FT#1 value and MAF value in the DATA LIST (with the engine stopped) are not within the normal operating range.
  1. CHECK MASS AIR FLOW METER 
  1. Perform confirmation driving pattern.
    1. Connect the intelligent tester to the DLC3.
    2. Turn the power switch ON.
    3. Turn the intelligent tester ON.
    4. Clear the DTCs (see DTC CHECK / CLEAR  ).
    5. Start the engine and warm it up with all accessory switches OFF (until the engine coolant temperature is 75°C (167°F) or more).
    6. Drive the vehicle at 50 km/h (31 mph) or more for 3 minutes or more*1.
    7. Let the engine to idle (accelerator pedal fully released) for 2 minutes or more*2.
    8. Perform steps *1 and *2 at least 3 times.
      Fig 1: Connecting Intelligent Tester To DLC3
      G05188982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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