2007 TOYOTA SIENNA Fuel System

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–281
ES
INSPECTION PROCEDURE
NOTICE:
• When a vehicle is brought into the workshop, leave it as it is. Do not change the vehicle
condition. For example, do not tighten the fuel cap.
• Do not disassemble the canister pump module.
• The intelligent tester is required to conduct the following diagnostic troubleshooting
procedure.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position (do not start
the engine).
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read DTCs.
(f) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / EVAP / EVAP VAPOR
PRESS.
(g) Read the EVAP (Evaporative Emission) pressure
displayed on the tester.
Result
B
C
A
(a) Turn the ignition switch off.
(b) Disconnect the E4 ECM connector.
(c) Measure the resistance between the PPMP terminal of
the ECM connector and the body ground.
1CONFIRM DTC AND EVAP PRESSURE
Display (DTC
Output)Test Result Suspected Trouble Area Proceed to
P0451 - Canister pressure sensor C
P0452 Less than 45 kPa-a (336 mmHg-a)• Wire harness/connector (ECM - Canister
pressure sensor)
• Canister pressure sensor
• Short in ECM circuitA
P0453 More than 120 kPa-a (900 mmHg-a)• Wire harness/connector (ECM - Canister
pressure sensor)
• Canister pressure sensor
• Open in ECM circuitB
Go to step 4
GO TO EVAP SYSTEM
2CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)
G035619E24

ES–2842GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NOTICE:
When replacing the canister, check the canister
pump module interior and related pipes for water,
fuel and other liquids. If liquids are present, check
for disconnections and/or cracks in the following: 1)
the pipe from the air inlet port to the canister pump
module; 2) the canister filter; and 3) the fuel tank
vent hose.
NEXT
HINT:
If the exhaust tailpipe has been removed, go to the next step
before reinstalling it.
NEXT
(a) Replace the ECM (See page ES-498).
NEXT
A163294E01
Go to step 8
6REPAIR OR REPLACE HARNESS OR CONNECTOR (CANISTER PUMP MODULE - ECM)
Go to step 8
7REPLACE ECM
Go to step 8

ES–2862GR-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
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.
DTC P0455Evaporative Emission Control System Leak
Detected (Gross Leak)
DTC P0456Evaporative Emission Control System Leak
Detected (Very Small Leak)
DTCs Monitoring ItemMalfunction Detection
ConditionTrouble Area Detection TimingDetection
Logic
P0455 EVAP gross leakVacuum 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 EVAP system
has a large leak.• Fuel tank cap (loose)
• Leakage from EVAP
line (Canister - Fuel
tank)
• Leakage from EVAP
line (Purge VSV -
Canister)
• Leakage from pump
module
• Leakage from fuel
tank
• Leakage from canisterWhile ignition
switch OFF2 trip
P0456 EVAP small leakVacuum pump creates negative
pressure (vacuum) in EVAP
system and EVAP system
pressure is measured. 0.02 inch
leak pressure standard measured
at start and end of leak check.
If stabilized pressure is higher
than second 0.02 inch leak
pressure standard, ECM
determines that EVAP system
has a small leak.While ignition
switch OFF2 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 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

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–287
ES
*2: If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.
1. P0455: EVAP (Evaporative Emission) gross 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 x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system
has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).
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 is leaking.60 seconds
F Final checkAtmospheric pressure is measured and then monitoring result is
recorded by ECM.- Sequence Operation Description Duration
A096746E34

ES–2922GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
Engine Running
Transmission counter gear speed 300 rpm or more
Battery voltage 8 V or more
Ignition switch ON
Starter OFF
Either of the following conditions is met Condition 1 or 2
1. Both of the following conditions are met Condition (a) or (b)
(a) ECT 20
C (68F) or more
(b) ECT sensor fail Not detected
(c) Time after PNP switch ON to OFF 10 seconds or more
2. Both of the following conditions are met Conditions (a) and (b)
(a) ECT Less than 20
C (68F)
(b) ECT sensor fail Detected
(c) Time after PNP switch ON to OFF 30 seconds or more
Vehicle speed sensor signal No signal
A122761E09

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–297
ES
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
(a) Check whether the stop lights turn on and off normally
when the brake pedal is depressed and released.
OK:
Stop lights turn on when brake pedal is depressed.
NG
OK
Switch status ON stuck Remain ON during GO and STOP 5 times
1CHECK OPERATION OF STOP LIGHT
A162496E02
GO TO TAILLIGHT RELAY CIRCUIT (See
page LI-114)

ES–3022GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
INSPECTION PROCEDURE
HINT:
• The following conditions may also cause DTC P0505 to be set:
(a) The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to be
slightly depressed and therefore the throttle valve position to be slightly open.
(b) The accelerator pedal being not fully released.
• Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame
data can be helpful in determining whether the vehicle was running or stopped, whether the engine
was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the
time of a malfunction.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read the DTCs.
Result
HINT:
If any DTCs other than P0505 are output, troubleshoot
those DTCs first.
B
A
OK:
PCV hose is connected correctly and is not damaged.
NG
OK
(a) Check the intake system for vacuum leakage.
(a) Engine RPM - target engine RPM Below -100 rpm, or 150 rpm or more
(b) Vehicle condition Stop after vehicle was driven by 6.25 mph (10.06 km/h) or more
2. Frequency that both of the following conditions (a)
and (b) are metOnce
(a) Engine RPM - target engine RPM Below -100 rpm, or 150 rpm or more
(b) IAC flow rate learning valve 1.3 L/sec. or less, or 8.5 L/sec. or more
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)
Display (DTC Output) Proceed to
P0505 A
P0505 and other DTCs B
GO TO DTC CHART (See page ES-56)
2CHECK PCV HOSE CONNECTIONS
REPAIR OR REPLACE PCV HOSE
3CHECK INTAKE SYSTEM