2007 TOYOTA SIENNA key

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–271
ES
1. KEY-OFF MONITOR
5 hours
*1 after the ignition switch is turned off, the electric vacuum pump creates negative pressure
(vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator
malfunctions based on the EVAP pressure.
HINT:
*1: If the engine coolant temperature is not below 35C (95F) 5 hours after the ignition switch is
turned off, the monitor check starts 2 hours later. If it is still not below 35
C (95F) 7 hours after the
ignition switch is turned off, the monitor check starts 2.5 hours later.
*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
Sequence Operation Description Duration
- ECM activationActivated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch
turned off.-
AAtmospheric pressure
measurementVent valve is turned OFF (vent) and EVAP system pressure is
measured by ECM in order to register atmospheric pressure.
If pressure in EVAP system is not between 70 kPa and 110 kPa (525
mmHg and 825 mmHg), ECM cancels EVAP system monitor.10 seconds
BFirst 0.02 inch leak pressure
measurementIn order to determine 0.02 inch leak pressure standard, vacuum pump
creates negative pressure (vacuum) through 0.02 inch orifice and then
ECM checks if vacuum pump and vent valve operate normally.60 seconds
CEVAP system pressure
measurementVent valve is turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) is created in EVAP system, and EVAP
system pressure is then measured.
Write down measured value as it will be used in leak check.
If EVAP pressure does not stabilize within 15 minutes, ECM cancels
EVAP system monitor.15 minutes
*2
D Purge VSV monitorPurge VSV is opened and then EVAP system pressure is measured
by ECM.
Large increase indicates normal.10 seconds
ESecond 0.02 inch leak pressure
measurementAfter second 0.02 inch leak pressure measurement, leak check is
performed by comparing first and second 0.02 inch leak pressure
standards.
If stabilized system pressure is higher than second 0.02 inch leak
pressure standard, ECM determines that EVAP system leaking.60 seconds
F Final checkAtmospheric pressure is measured and then monitoring result is
recorded by ECM.-

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–275
ES
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
Purge flow:
Purge VSV stuck open and closed:
Key-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
Related DTCsP0441: Purge VSV stuck open
P0441: Purge VSV stuck closed
P0441: Purge flow
Required Sensors / Components Purge VSV and pump module
Frequency of Operation Once per driving cycle
Duration Within 15 minutes
MIL Operation 2 driving cycles
Sequence of Operation None
The monitor is run whenever this DTC is not presentP0011, P0012 (VVT System 1-Advance, Retard), P0021, P0022 (VVT System 2-
Adavance, Retard), P0100, P0101, P0102, P0103 (MAF Sensor), P0110, P0112,
P0113 (IAT Sensor), P0115, P0116, P0117, P0118 (ECT Sensor), P0120, P0121,
P0122, P0123, P0220, P0222, P0223 , P2135 (TP Sensor), P0125 (Insufficient ECT
for Closed Loop), P0171,P0172 (Fuel System), P0300, P0301, P0302, P0303,
P0304, P0305, P0306 (Misfire), P0335 (CKP Sensor), P0340 (CMP Sensor), P0351,
P0352, P0353, P0354, P0355, P0356 (Ignitor), P0450, P0451, P0452, P0453 (EVAP
pressure Sensor), P0500 (VSS)
Engine Running
ECT 4.4
C (40F) or more
IAT 4.4
C (40F) or more
EVAP pressure sensor Not detected
EVAP canister purge valve 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
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Battery voltage 10.5 V or more
Vehicle speed Less than 2.5 mph (4 km/h)
Ignition switch OFF
Time after key-off 5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0452,
P0453)Not detected
EVAP canister purge valve Not operated by scan tool
EVAP canister vent valve Not operated by scan tool
EVAP leak detection pump Not operated by scan tool
Both of the following conditions 1 and 2 are met 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 95F)
IAT 4.4 to 35
C (40 to 95F)
Next sequence is run if the following condition is met -
Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) in 1 second

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–279
ES
TYPICAL ENABLING CONDITIONS
All:
P0451 (Noise monitor):
P0451 (Stuck monitor):
P0450, P0452 and P0453:
TYPICAL MALFUNCTION THRESHOLDS
(a) P0450: Pressure sensor chattering
(b) P0451: Pressure sensor noise
(c) P0451: Pressure sensor stuck
(d) P0452: Pressure sensor low voltage
(e) P0453: Pressure sensor high voltage
DurationLess than 15 seconds: P0451 (Pressure sensor noise)
Within 2 minutes: P0451 (Pressure sensor stuck)
0.5 seconds: P0450, P0452, P0453
MIL OperationImmediate: P0450, P0452, P0453
2 driving cycles: P0451
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Battery voltage 10.5 V or more
IAT 4.4 to 35
C (40 to 95F)
EVAP pressure sensor malfunction (P0450, P0452,
P0453)Not detected
Either of the following conditions 1 or 2 is met -
1. Engine condition Running
2. Time after key-off 5 or 7 or 9.5 hours
Battery voltage 10.5 V or more
IAT 4.4 to 35
C (40 to 95F)
EVAP pressure sensor malfunction (P0450, P0452,
P0453)Not detected
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Time after key-off 5 or 7 or 9.5 hours
Ignition switch ON
Battery voltage 8 V or more
Sta r t e r OF F
EVAP pressure Less than 42.11 kPa (316 mmHg), or more than 123.761 kPa (928 mmHg)
Frequency that EVAP pressure change is 0.3 kPa (2.25
mmHg) or more10 times or more in 10 seconds
EVAP pressure change during reference pressure
measurementLess than 0.65 kPa (4.876 mmHg)
EVAP pressure Less than 42.11 kPa (316 mmHg)
EVAP pressure More than 123.761 kPa (928 mmHg)

ES–2882GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
2. P0456: EVAP very small leak
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the
EVAP system pressure is measured. If the stabilized system pressure is higher than second 0.02 inch
leak pressure standard, the ECM determines that the EVAP system has a small leak, illuminates the
MIL and sets the DTC (2 trip detection logic).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Related DTCsP0455: Gross leak detected
P0456: Very small leak (0.020 inch hole) detected
Required Sensors / Components Purge VSV and pump module
Frequency of Operation Once per driving cycle
Duration Within 15 minutes
MIL Operation 2 driving cycles
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Battery voltage 10.5 V or more
Vehicle speed Less than 2.5 mph (4 km/h)
Ignition switch OFF
Time after key-off 5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0452,
P0453)Not detected
EVAP canister purge valve Not operated by scan tool
EVAP canister vent valve Not operated by scan tool
EVAP leak detection pump Not operated by scan tool
Both of the following conditions 1 and 2 are met before
key-off-
1. Duration that vehicle driven 5 minutes or more
G038299E10

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–289
ES
Key-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
2. First reference pressure measurement
3. EVAP canister vent valve close stuck check
4. Vacuum introduction
5. EVAP canister purge valve close stuck check
6. Second reference pressure measurement
7. Leak check
8. Atmospheric pressure measurement
TYPICAL MALFUNCTION THRESHOLDS
P0455: EVAP gross leak
P0456: EVAP 0.02 inch leak
2. EVAP purge operation Performed
ECT 4.4 to 35
C (40 to 95F)
IAT 4.4 to 35
C (40 to 95F)
Next sequence is run if the following condition is met -
Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) in 1 second
Next sequence is run if the following conditions are met Conditions 1, 2 and 3
1. EVAP pressure just after reference pressure
measurement-1 kPa (-7.5 mmHg) or less
2. Reference pressure -4.85 to -1.057 kPa (-36.384 to -7.929 mmHg)
3. Reference pressure Saturated within 1 minutes
Next sequence is run if the following condition is met -
EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more
Next sequence is run if the following condition is met -
EVAP pressure Saturated within 15 minutes
Next sequence is run if the following condition is met -
EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more
Next sequence is run if the following conditions are met Conditions 1, 2, 3 and 4
1. EVAP pressure just after reference pressure
measurement-1 kPa (-7.5 mmHg) or less
2. Reference pressure -4.85 to -1.057 kPa (-36.384 to -7.929 mmHg)
3. Reference pressure Saturated
4. Difference between first reference pressure and
second reference pressureLess than 0.7 kPa (5.25 mmHg)
Next sequence is run if the following condition is met -
EVAP pressure when vacuum introduction was
completeLower than second reference pressure
EVAP monitor is complete if the following condition was
met-
Atmospheric pressure difference between sequence 1
and 8Within 0.3 kPa (2.25 mmHg)
EVAP pressure when vacuum introduction is complete Between reference pressure and reference pressure x 0.2
EVAP pressure when vacuum introduction is complete Higher than reference pressure x 0.2

ES–3882GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DTC SUMMARY
DESCRIPTION
The circuit description can be found in the EVAP (Evaporative Emission) System (See page ES-404).
INSPECTION PROCEDURE
Refer to the EVAP System (See page ES-404).
MONITOR DESCRIPTION
5 hours*1 after the ignition switch is turned off, the electric vacuum pump creates negative pressure
(vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator
malfunctions based on the EVAP pressure.
HINT:
*1: If the engine coolant temperature is not below 35
C (95F) 5 hours after the ignition switch is turned
off, the monitor check starts 2 hours later. If it is still not below 35
C (95F) 7 hours after the ignition switch
is turned off, the monitor check starts 2.5 hours later.
*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
DTC P2420Evaporative Emission System Switching Valve
Control Circuit High
DTC No. Monitoring Item DTC Detection Condition Trouble Area Detection TimingDetection
Logic
P2420Vent valve stuck
open (vent)The following condition is met
during key-off EVAP monitor
• EVAP pressure change when
vent valve is closed (ON) less
than 2.3 mmHg• Pump module (0.02 inch
orifice, vacuum pump, vent
valve)
• Connector / wire harness
(Pump module - ECM)
•ECMIgnition switch off 2 trip
Sequence Operation Description Duration
- ECM activationActivated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch is
turned off.-
AAtmospheric pressure
measurementVent valve turned is OFF (vent) and EVAP system pressure is
measured by ECM in order to register atmospheric pressure.
If pressure in EVAP system is not between 70 kPa and 110 kPa (525
mmHg and 825 mmHg), ECM cancels EVAP system monitor.10 seconds
BFirst 0.02 inch leak pressure
measurementIn order to determine 0.02 inch leak pressure standard, vacuum pump
creates negative pressure (vacuum) through 0.02 inch orifice and then
ECM checks if vacuum pump and vent valve operate normally.60 seconds
CEVAP system pressure
measurementVent valve is turned ON (closed) to shut EVAP system.
Negative pressure (vacuum) is created in EVAP system, and then
EVAP system pressure is measured. Write down measured value as
they will be used in leak check.
If EVAP pressure does not stabilize within 15 minutes, ECM cancels
EVAP system monitor.15 minutes
*2
D Purge VSV monitorPurge VSV is opened and then EVAP system pressure is measured
by ECM.
Large increase indicates normal.10 seconds
ESecond 0.02 inch leak pressure
measurementAfter second 0.02 inch leak pressure measurement, leak check is
performed by comparing first and second 0.02 inch leak pressure
standards.
If stabilized system pressure is higher than second 0.02 inch leak
pressure standard, ECM determines that there is a leak in EVAP
system.60 seconds
F Final checkAtmospheric pressure is measured and then monitoring result is
recorded by ECM.-

ES–3902GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Key-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
2. First reference pressure measurement
3. EVAP canister vent valve close stuck check
4. Vacuum introduction
5. EVAP canister purge valve close stuck check
6. Second reference pressure measurement
Related DTC P2420: Vent valve stuck open (vent)
Required Sensors/Components Purge VSV and pump module
Frequency of Operation Once per driving cycle
Duration Within 2 minutes
MIL Operation 2 driving cycles
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Atmospheric pressure 70 to 110 kPa (525 to 825 mmHg)
Battery voltage 10.5 V or more
Vehicle speed Less than 2.5 mph (4 km/h)
Ignition switch OFF
Time after key-off 5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0452,
P0453)Not detected
EVAP canister purge valve Not operated by scan tool
EVAP canister vent valve Not operated by scan tool
EVAP leak detection pump Not operated by scan tool
Both of the following conditions 1 and 2 are 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 95F)
IAT 4.4 to 35
C (40 to 95F)
Next sequence is run if the following condition is met -
Atmospheric pressure change Less than 0.3 kPa (2.25 mmHg) in 1 second
Next sequence is run if the following conditions are met Condition 1, 2 and 3
1. EVAP pressure just after reference pressure
measurement start-1 kPa (-7.5 mmHg) or less
2. Reference pressure -4.85 to -1.057 kPa (-36.384 to -7.929 mmHg)
3. Reference pressure Saturated within 1 minutes
Next sequence is run if the following condition is met -
EVAP pressure change after vent valve is ON 0.3 kPa (2.25 mmHg) or more
Next sequence is run if the following condition is met -
EVAP pressure Saturated within 15 minutes
Next sequence is run if the following condition is met -
EVAP pressure change after purge valve is open 0.3 kPa (2.25 mmHg) or more
Next sequence is run if the following conditions are met Condition 1, 2, 3 and 4

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–413
ES
NOTICE:
If the 0.02 inch reference pressure difference between the first and second checks is greater than
the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455,
P0456, P2401, P2420) will be all stored.
CONFIRMATION DRIVING PATTERN
HINT:
After a repair, check Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow
Monitor Confirmation described below.
1. KEY-OFF MONITOR CONFIRMATION
(a) Preconditions
The monitor will not run unless:
(1) The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)
(2) The fuel tank is less than 90% full
(3) The altitude is less than 8000 ft (2400 m)
(4) The Engine Coolant Temperature (ECT) is between 4.4
C and 35C (40F and 95F)
(5) The Intake Air Temperature (IAT) is between 4.4
C and 35C (40F and 95F)
(6) The vehicle remains stationary (the vehicle speed is 0 mph [0 km/h])
(b) Monitor Conditions
(1) Allow the engine to idle for at least 5 minutes.
A106731E15