Monitor Requirements (OBD-II Drive Cycle)

The following conditions must occur to complete all OBD-II monitors and it's components:

• The misfire, comprehensive component, and fuel monitors are checked continuously from engine warm-up and can complete any time.
• The misfire monitor on applications with fuel deceleration shut-off requires a deceleration at closed throttle for 10 seconds following the acceleration to 55 MPH at one quarter to one half throttle. Decelerations following an acceleration must be performed twice consecutively (or three consecutively on some truck applications) to satisfy this misfire requirement.
• A transmission component functional verification in the comprehensive component monitor requires at least 6 complete stops in the normal city portion of the drive cycle.
• The EGR and secondary air injection monitors require a series of idles and accelerations.
• The HO2S monitor requires a steady speed driven for approximately 1 minute at 30 to 40 MPH.
• The secondary air injection monitor requires almost 12 minutes of vehicle operating time from initial start-up.
• The catalyst efficiency monitor requires a steady speed driven for 5 minutes at 40 to 60 MPH, followed by a normal city drive between 25 and 40 MPH for 10 minutes.
• The evaporative emission monitor requires at least 8 minutes of the steady throttle part of the drive cycle (10 minutes) between 45 to 60 MPH to test the evaporative system.