Toyota 2GR-FE Manual page 441

Time after key off
EVAP pressure sensor malfunction (P0450, P0451, P0452 and
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
1. 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 conditions are met:
Vacuum introduction time
5. EVAP VSV stuck closed check
Next sequence is run if following condition is met:
EVAP pressure change after purge VSV ON
6. Second reference pressure measurement
Next sequence is run if all of following conditions are met:
1. EVAP pressure just after reference pressure measurement
2. Reference pressure
3. Reference pressure
4. Reference pressure difference between first and second
7. Leak check
Next sequence is run if following condition is met:
EVAP pressure when vacuum introduction was complete
8. Atmospheric pressure
Monitor is complete
Atmospheric pressure difference between sequence 1 and 8
TYPICAL MALFUNCTION THRESHOLDS
"Saturated" indicates that the EVAP pressure change is less than 0.1 kPa (0.75 mmHg) in 30 seconds.
P0455: EVAP gross leak
EVAP pressure when vacuum introduction is complete
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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
-
0.3 kPa (2.25 mmHg) or more
Conditions 1, 2, 3 and 4
-1 kPa (-7.5 mmHg) or less
-4.85 to -1.05 kPa (-36.38 to -7.87 mmHg)
Saturated within 1 minute
Less than 0.7 kPa (5.25 mmHg)
-
Less than second reference pressure
-
0.3 kPa (2.25 mmHg) or less
Higher than reference pressure x 0.2
ES–285
ES