Circuit Description

Conditions (a), (b) and (c) continue for more than 10 seconds (2 trip detection logic):

1. Engine speed less than 900 rpm
2. Engine coolant temperature 70°C (158°F) or higher
3. Voltage output of Mass Air Flow (MAF) meter more than 2.2 V (varies with Throttle Position (TP) sensor voltage)

Conditions (a) and (b) continue for more than 6 seconds (2 trip detection logic):

1. Engine speed more than 0 rpm
2. VTA is more than 0.1 V
3. Voltage output of MAF meter less than 0.4 V (varies with TP sensor voltage)