Enable Criteria
- Barometric pressure is more than 10.5 psi (72 kPa).
- Engine coolant temperature is 167-248°F (75-120°C), normal operating temperature.
- Intake air temperature is 66-176°F (19-80°C).
- Engine is in closed loop.
- Engine has run for 10 minutes off idle in order to initiate a test.
- Battery voltage is 10-18 volts.