Toyota 2GR-FE Manual page 429

OBD II MONITOR SPECIFICATIONS
1. Key-off Monitor
Monitor Strategy:
Required Sensors/Components
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
Typical Enabling Conditions:
EVAP key-off monitor runs when all of following conditions are met:
Atmospheric pressure
Battery voltage
Vehicle speed
Engine switch
Time after key off
EVAP pressure sensor malfunction (P0450, P0451, P0452 and/or
P0453)
EVAP VSV
Vent valve
Leak detection pump
Both of following conditions are met before key off:
1. Duration that vehicle is being driven
2. EVAP purge operation
ECT
IAT
(a) Key-off monitor sequence 1 to 8
1. Atmospheric pressure
Next sequence is run if following condition is met:
Atmospheric pressure change
2. First reference pressure
Next sequence is run if all of following conditions are met:
1. EVAP pressure when 4 seconds. after reference pressure
measurement
2. Reference pressure
3. Reference pressure
3. Vent valve stuck closed check
Next sequence is run if following condition is met:
EVAP pressure change after vent valve is ON
4. Vacuum introduction and leak
Next sequence is run if both of following condition is met:
Vacuum introduction time
5. EVAP VSV stuck closed check
Next sequence is run if following condition is met:
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
In order to ensure reliable malfunction detection, the
variation between the atmospheric pressure, before
and after conduction of the purge flow monitor, is
measured by the ECM.
EVAP VSV and pump module
Once per driving cycle
Within 15 minutes
2 driving cycles
None
-
70 to 110 kPa (525 to 825 mmHg)
10.5 V or more
Below 2.5 mph (4 km/h)
OFF
5, 7 or 9.5 hours
Not detected
Not operated by scan tool
Not operated by scan tool
Not operated by scan tool
Conditions 1 and 2
5 minutes or more
Performed
4.4 to 35°C (40 to 95°F)
4.4 to 35°C (40 to 95°F)
-
Less than 0.3 kPa (2.25 mmHg) for 1 second
Conditions 1, 2 and 3
-1 kPa (-7.5 mmHg) or less
-4.85 to -1.05 kPa (-36.38 to -7.87 mmHg)
Saturated within 1 minute
-
0.3 kPa (2.25 mmHg) or more
-
15 minutes or less
-
ES–273
ES