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z RPM Range during Monitor: 2200 RPM to 2400 RPM. z Actual TP Sensor above minimum TP Sensor Range: .295 volts to 1.0 volt. z Maximum Short Term Adapt = +6%. z The PCM stores the EGR on Short Term Adaptive Memory value. The PCM begins the monitor. The PCM turns off the EGR Solenoid. The PCM uses a modified ramp rate for Catalyst Monitor Perform the following: z Engine coolant temp above 170°F. z Accumulated open throttle time of 3:00 minutes. z Vehicle speed above 20 MPH z TP Sensor is open for 4:00 minutes (A/T) or 5:00 minutes (M/T). z MAP range during monitor: 14.60" to 18.20". z The RPM range during monitor: 1500 RPM to 2000 RPM. z Time spent in MAP and RPM ranges should be more than 3.9 seconds. z No Limp-In or OBD-II Monitor faults present. The PCM begins the monitor. The PCM starts a timer and counts the Upstream O2S switches and counts the Purge Flow Monitor Perform the following: z A Purge Free Cell Update must take place. z A/T transmission is in gear at idle, Cell 12, or M/T is in Cell 13. To perform a Purge Free Cell Update: NOTE: If the vehicle speed drops below 20 MPH or the throttle is closed, the timer
1998 Chevrolet Pickup C1500 DRIVE CYCLES OBD-II Vehicles - OBD-II Readiness Monitors
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