- Start engine and warm it up to the normal operating temperature.
- Stop the engine and turn ignition switch OFF.
- 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.
- 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.