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EVAPORATIVE EMISSIONS DIAGNOSIS AND TESTING OBD II MONITOR INFORMATION Comprehensive Components Monitor Major Monitors Non Fuel Control & Non Misfire Major Monitors Fuel Control & misfire (Includes All Engine Hardware Sensor, Switches, Solenoids, etc.) (Monitors Entire Emission System) (Monitors Entire System) Most are one trip Faults Most are Two Trips Faults Two Trip Faults Usually Turns on The Mill and Sets DTC After One Failure Turns On The Mil and Sets DTC after Two Consecutive Failure The Mil and Sets DTC After Two Consecutive Failure Priority 3 Priority 1 or 3 Priority 2 or 4 All Checked For Continuity Done Stop Test = Yes Fuel Control Monitor Open Oxygen Sensor Heater Monitors Fuel Control Short To Ground Oxygen Sensor Response System For: Short To Voltage Catalytic Converter Fuel System Lean Inputs Checked For Rationality Efficiency Except EWMA Fuel System Rich Outputs Checked For up to 6 test per trip and a one Requires 3 Consecutive Fuel System Good Trips to Extinguish the MIL EGR System Misfire Monitor Evaporative Emission System Monitors for Engine Misfire At: Non-LDP 4 X 1000 RPM Counter (4000 Revs) (Type B) LDP **200 X 3 (600) RPM counter (Type A) Requires 3 Consecutive Global Good Trips to Extinguish the MIL* Requires 3 Consecutive Global Requires 3 Consecutive Global *40 Warm Up Cycles are required to erase DTCs after the MIL has been extinguished ** Type A misfire is a one trip failure on pre-1999, 2 trip failure on 1999 and later. The MIL will illuminate at the first or second failure, based on MY. 25 - 14 EVAPORATIVE EMISSIONS LX |