2012 Toyota 4Runner Limited, AWDFACTORY OEM SERVICE PROCEDURE

Mass Air Flow Meter: Inspection: Inspection

  1. INSPECT MASS AIR FLOW METERΒ 
    1. Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter in the areas shown in the illustration.
      Fig 1: Inspecting Mass Air Flow Meter Connector
      GTY213848Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      There is no foreign matter.

      TEXT IN ILLUSTRATION

      *1 Platinum Hot Wire (Heater)

      If the result is not as specified, replace the mass air flow meter.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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