2007 TOYOTA SIENNA Service Repair Manual

service interval reset relay battery isofix brake pads replacement belt

Page 561 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2682GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ESKey-off monitor sequence 1 to 8
1. Atmospheric pressure measurement
2. First reference pressure measurement
3. EVAP canister vent valve close st

ES–2682GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ESKey-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
Time after key-off 5 or 7 or 9.5 hours
EVAP pressure sensor malfunction (P0450, P0451,
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
Next sequence is run if all of 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 minute
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 all of 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 is
met:-

Page 562 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–269
ES
TYPICAL MALFUNCTION THRESHOLDS
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page ES-19).
Atmospheric pressure difference between sequen

Page 563 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2702GR-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-409).
INSPECTION PROCEDURE

ES–2702GR-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-409).
INSPECTION PROCEDURE
Refer to the EVAP System (See page ES-412).
MONITOR DESCRIPTION
The two monitors, Key-Off and Purge Flow, are used to detect malfunctions relating to DTC P0441. The
Key-off monitor is initiated by the ECM internal timer, known as the soak timer, 5 hours
*1 after the ignition
switch is turned off. The purge flow monitor runs while the engine is running.
DTC P0441Evaporative Emission Control System Incorrect
Purge Flow
DTCs Monitoring Item Malfunction Detection Condition Trouble AreaDetection
TimingDetection
Logic
P0441Purge VSV (Vacuum
Switching Valve) stuck
openVacuum pump creates negative pressure
(vacuum) in EVAP system and EVAP
system pressure is measured. 0.02 inch
leak pressure standard is measured at
start and end of leak check.
If stabilized pressure is higher than
[second 0.02 inch leak pressure
standard x 0.2], ECM determines that
purge VSV is stuck open
• Purge VSV
• Purge VSV circuit
(between purge VSV
and ECM)
• Leakage from EVAP
line (between purge
VSV and intake
manifold)
• EVAP line clogged
(between purge VSV
and canister)
•ECMWhile
ignition
switch OFF2 trip
P0441 Purge VSV stuck closedAfter EVAP leak check is performed,
purge VSV is turned ON (open), and
atmospheric air is introduced into EVAP
system. 0.02 inch leak pressure standard
is measured at the start and end of leak
check.
If pressure does not return to near
atmospheric pressure, ECM determines
that purge valve is stuck closedWhile
ignition
switch OFF2 trip
P0441 Purge flowWhile engine running, the following
conditions are successively met:
• Negative pressure is not created in
EVAP system when purge VSV is
turned ON (open)
• EVAP system pressure change is
less than 0.5 kPa (3.75 mmHg) when
vent valve is turned ON (closed)
• Atmospheric pressure change before
and after purge flow monitor is less
than 0.1 kPa (0.75 mmHg)While
ignition
switch OFF2 trip

Page 564 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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

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.-

Page 565 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2722GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
A096746E33

Page 566 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–273
ES
(a) Purge VSV stuck open
In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative
Emission) system. The EVA

Page 567 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–2742GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(b) Purge VSV stuck closed
In operation D, the pressure sensor measures the EVAP (Evaporative Emission) system
pressure. The pressure measurem

Page 568 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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 p

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

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