Toyota 2GR-FE Manual page 421

EVAP pressure during EVAP key-off monitor
Purge VSV
Vent Valve
Pump
EVAP Pressure
(mmHg)
760
752
724
Sequence
Time
The leak detection pump creates negative pressure through the reference orifice. When the system is
normal, the EVAP pressure is in 724 to 752 mmHg
If not, the ECM interprets this as a malfunction. The ECM will illuminate the MIL and set DTC if this
malfunction is detected in consecutive drive cycle.
*
: Typical valve
MONITOR STRATEGY
Related DTCs
Required Sensors / Components
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not
present
EVAP key-off monitor is run when all of the following
conditions are met
Atmospheric pressure
Battery voltage
Vehicle speed
Ignition switch
Time after key-off
EVAP pressure sensor malfunction (P0450, P0451,
P0452, P0453)
EVAP canister purge valve
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
A B
10 seconds 60
Within 15 minutes
seconds
*
P043E: 0.02 inch orifice clog (built-in pump module)
P043F: 0.02 inch orifice high-flow (built-in pump module)
P2401: Vacuum pump stuck OFF
P2402: Vacuum pump stuck ON
P2419: Vent valve stuck open (vent)
Pump module
Once per driving cycle
Within 2 minutes
2 driving cycles
None
None
-
70 to 110 kPa (525 to 825 mmHg)
10.5 V or more
Below 2.5 mph (4 km/h)
OFF
5 or 7 or 9.5 hours
Not detected
Not operated by scan tool
ON
ON: Open
ON
ON: Closed
ON
OK
Malfunction
C D
60
10
seconds
seconds
and saturated within a minute.
ES–265
OFF: Closed
ON: Vent
E
A138478E01
ES