OBD II MONITOR SPECIFICATIONS
- Key-off Monitor MONITOR STRATEGY Required Sensors/Components Purge VSV and canister pump module Frequency of Operation Once per driving cycle Duration Within 15 minutes (varies with fuel in tank) MIL Operation 2 driving cycles Sequence of Operation None TYPICAL ENABLING CONDITIONS Monitor runs whenever following DTCs not stored None EVAP key-off monitor runs when all of following conditions met - Atmospheric pressure 70 to 110 kPa-a (525 to 825 mmHg-a) Battery voltage 10.5 V or higher Vehicle speed Less than 4 km/h (2.5 mph) Engine switch Off Time after key off 5 or 7 or 9.5 hours Canister pressure sensor malfunction (P0452, P0453) Not detected Purge VSV Not operated by scan tool Vent valve Not operated by scan tool Leak detection pump Not operated by scan tool Both of following conditions 1 and 2 set before key off - 1. Duration that vehicle driven 5 minutes or more 2. EVAP purge operation Performed ECT 4.4 to 35°C (40 to 95°F) IAT 4.4 to 35°C (40 to 95°F) TYPICAL MALFUNCTION THRESHOLDS Purge VSV stuck open: - EVAP pressure when vacuum introduction complete Reference pressure x 0.2 or higher Purge VSV stuck closed: - EVAP pressure change after purge VSV ON (open) Below 0.3 kPa-g (2.25 mmHg-g)
- Purge Flow Monitor MONITOR STRATEGY Required Sensors/Components Purge VSV and canister pump module Frequency of Operation Once per driving cycle Duration Within 10 minutes MIL Operation 2 driving cycles Sequence of Operation None TYPICAL ENABLING CONDITIONS Monitor runs whenever following DTCs not stored None Engine Running ECT 4.4°C (40°F) or higher IAT 4.4°C (40°F) or higher Canister pressure sensor malfunction (P0452, P0453) Not detected Purge VSV Not operated by scan tool EVAP system check Not operated by scan tool Atmospheric pressure 70 to 110 kPa-a (525 to 825 mmHg-a) [absolute pressure] Battery voltage 10 V or higher (IAT below 50°C) or 12 V or higher (IAT 50°C or higher) Purge duty cycle 8% or more TYPICAL MALFUNCTION THRESHOLDS Both of following conditions met Conditions 1 and 2 1. EVAP pressure change when purge operation started Below 0.1 kPa-g (0.75 mmHg-g) 2. EVAP pressure change during purge operation when vent valve closed Below 0.4 kPa-g (3 mmHg-g)