1.CHECK SECONDARY AIR INJECTION SYSTEM MASS AIR FLOW SENSOR

1. Start engine and warm it up to the normal operating temperature.
2. Stop the engine and turn ignition switch OFF.
3. Cool down the engine so that the coolant temperature lowers between 15 - 35°C (59 - 95°F).
   ■ CAUTION ■
   Never turn the ignition switch ON while cooling down the engine.
   NOTE：
   The engine cooling down time varies depending on the ambient temperature. Putting the vehicle in an indoor place where the temperature is moderate may shorten the cooling down time.
4. Check the voltage between ECM harness connector terminals under the following conditions.

   ECM | Condition | Voltage
   Connector | + | −
   Terminal | Terminal
   F22 | 24 (Secondary air injection system mass air flow sensor) | 23 | Turning ignition switch ON (Engine stopped) | 0.15 - 0.4 V
   Idle speed (Secondary air injection system operates.) | 3 - 3.8 V

Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace secondary air injection system mass air flow sensor.