Enable Criteria

The following conditions are for running a passive test (engine in open loop).

• Engine coolant temperature is less than 230°F (110°C).
• Intake air temperature is more than 50°F (10°C).
• Battery voltage is more than 9 volts.

The following conditions are for running an active test (engine in closed loop).

• Engine coolant temperature is more than 167°F (75°C).
• Intake air temperature is more than 50°F (10°C).
• Battery voltage is more than 9 volts.
• Engine is operating is in closed loop fuel control.