OBD II Monitor Specifications
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
- Key-off Monitor
Monitor Strategy
MONITOR STRATEGY CHARTRequired Sensors/Components Purge VSV and canister pump module Frequency of Operation Once per driving cycle Duration Within 15 minutes (varies with amount of fuel in tank) MIL Operation 2 driving cycles Sequence of Operation None Typical Enabling Conditions
TYPICAL ENABLING CONDITIONS CHARTEVAP key-off monitor runs when all of the following conditions met - Atmospheric pressure 70 to 110 kPa-a (525 to 825 mmHg-a) Battery voltage 10 5 V or more Vehicle speed Below 2 5 mph (4 km/h) Engine switch off Time after key off 5 or 7 or 9 5 hours Canister pressure sensor malfunction (P0451, P0452 and 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 the following conditions met before key off Conditions 1 and 2 1 Duration that vehicle driven 5 minutes or more 2 EVAP purge operation Performed Engine coolant temperature 4 4 to 35°C (40 to 95°F) Intake air temperature 4 4 to 35°C (40 to 95°F) Typical Malfunction Thresholds
TYPICAL MALFUNCTION THRESHOLDS CHARTPurge VSV stuck open - EVAP pressure when vacuum introduction complete Higher than reference pressure x 0 32 TYPICAL MALFUNCTION THRESHOLDS CHARTPurge VSV stuck closed - EVAP pressure change after purge VSV ON (open) Less than 0 3 kPa-g (2 25 mmHg-g) - Key-off monitor sequence 1 to 8
- Atmospheric Pressure Measurement TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if following condition set - Atmospheric pressure change Less than 0 3 kPa-g (2 25 mmHg-g) in 1 second - First Reference Pressure Measurement TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if all of the following conditions set Condition 1, 2 and 3 1 EVAP pressure just after reference pressure measurement started -1 kPa-g (-7 5 mmHg-g) or less 2 Reference pressure -4 85 to -1 057 kPa-g (-36 4 to -7 93 mmHg-g) 3 Reference pressure Saturated within 60 seconds - Vent Valve Stuck Closed Check TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if following condition set - EVAP pressure change after vent valve ON (closed) 0 3 kPa-g (2 25 mmHg-g) or more - Vacuum Introduction TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if following condition set - EVAP pressure Saturated within 15 minutes - Purge VSV Stuck Closed Check TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if following condition set - EVAP pressure change after purge VSV ON (open) 0 3 kPa-g (2 25 mmHg-g) or more - Second Reference Pressure Measurement TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if all of the following conditions set Condition 1,2,3 and 4 1 EVAP pressure just after reference pressure -1 kPa-g (-7 5 mmHg-g) or less 2 Reference pressure -4 85 to -1 057 kPa-g (-36 4 to -7 93 mmHg-g) 3 Reference pressure Saturated within 60 seconds 4 Reference pressure difference between first and second Less than 0 7 kPa-g (5 25 mmHg-g) - Leak Check TYPICAL MALFUNCTION THRESHOLDS CHART
Next sequence run if following condition set - EVAP pressure when vacuum introduction complete Second reference pressure or less - Atmospheric Pressure Measurement TYPICAL MALFUNCTION THRESHOLDS CHART
EVAP monitor complete if following condition set - Atmospheric pressure difference between sequence 1 and 8 Within 0 3 kPa-g (2 25 mmHg-g)
- Atmospheric Pressure Measurement
- Purge Flow Monitor
Monitor Strategy
MONITOR STRATEGY CHARTRequired 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
TYPICAL ENABLING CONDITIONS CHARTMonitor runs whenever following DTCs not present P0011 (VVT System 1 - Advance)
P0012 (VVT System 1 - Retard)
P0021 (VVT System 2 - Advance)
P0022 (VVT System 2 - Retard)
P0101 - P0103 (Mass air flow meter)
P0112, P0113 (Intake air temperature sensor)
P0115 - P0118 (Engine coolant temperature sensor)
P0120 - P0223, P2135 (Throttle position sensor)
P0125 (Insufficient engine coolant temperature for Closed Loop)
P0171, P0172, P0173, P0174 (Fuel system)
P0300 - P0308 (Misfire)
P0335 (Crankshaft position sensor)
P0340 (VVT sensor)
P0351 - P0358 (Igniter)
P0451 - P0453 (Canister pressure sensor)
P0500 (Vehicle speed sensor)Engine Running Engine coolant temperature 4 4°C (40°F) or more Intake air temperature 4 4°C (40°F) or more Canister pressure sensor malfunction Not detected Purge VSV Not operated by scan tool EVAP system check Not operated by scan tool Battery voltage 10 V or more Purge duty cycle 8% or more Typical Malfunction Thresholds
TYPICAL MALFUNCTION THRESHOLDS CHARTBoth of the following conditions met Conditions 1 and 2 1 EVAP pressure change when purge operation started Less than 0 1 kPa-g (0 75 mmHg-g) 2 EVAP pressure change during purge operation when vent valve closed Less than 0 3 kPa-g (2 25 mmHg-g)