Circuit Description

For circuit description, see DTC P0100: MASS AIR FLOW CIRCUIT MALFUNCTION . Detecting conditions of DTC are:

• After engine is warmed up, following conditions continue for more than 10 seconds when engine speed is 900 RPM or less (2 trip detection logic):
  1. Throttle valve fully closed.
  2. Mass air flow meter output is greater than 2.2 V.
  3. THW is greater than 158°F (70°C).
• The following conditions continue for more than 10 seconds when engine speed is 1500 RPM or more (2 trip detection logic):
  1. VTA is greater than or equal to 0.1 V.
  2. Mass air flow meter output is less than 1 V.