TOYOTA SIENNA 2007 Service Repair Manual

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–425
ES
(a) Check the EVAP pressure in steps 1/5 and 2/5.
Result
*: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
HINT:
The first 0.02 inch leak pressure standard is the value
determined in step 2/5.
B
A
5PERFORM EVAP SYSTEM CHECK (STEP 1/5 TO 2/5)
G036784E06
DTC* Test Result Suspected Trouble Area Proceed to
-Virtually no variation in EVAP pressure
during step 1/5. Then decreases to 0.02 inch
leak pressure standard*Not yet determined A
P2402Small difference between EVAP pressures
during steps 1/5 and 2/5Vacuum pump stuck ON B
Go to step 23

ES–4262GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HINT:
Make a note of the pressures checked in steps (a) and (b)
below.
(a) Check the EVAP pressure 4 seconds after the vacuum
pump is activated*1 (Step (a)).
(b) Check the EVAP pressure again when it has stabilized.
This pressure is the 0.02 inch leak pressure standard
(Step (b)).
*1: The vacuum pump begins to operate at the time step
2/5 starts.
Result
*2: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
B
C
D
6PERFORM EVAP SYSTEM CHECK (STEP 2/5)
G036785E09
DTC*2 Test Result Suspected Trouble Area Proceed to
-EVAP pressure in step (b) is between -4.85
kPa and -1.06 kPa (-36.38 mmHg and -7.95
mmHg)Not yet determined A
P043F and P2401EVAP pressure in step (b) is -1.06 kPa (-7.95
mmHg) or more• 0.02 inch orifice high-flow
• Vacuum pump stuck OFFB
P043EEVAP pressure in step (b) is less than -4.85
kPa (-36.38 mmHg)0.02 inch orifice clogged C
P2419EVAP pressure in step (a) is more than -1.06
kPa (-7.95 mmHg)Vent valve stuck closed D
Go to step 11
Go to step 30
Go to step 19

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–427
ES
A
(a) Check the EVAP pressure increase in step 3/5.
Result
*: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
B
C
A
7PERFORM EVAP SYSTEM CHECK (STEP 2/5 TO 3/5)
G036786E07
DTC* Test Result Suspected Trouble Area Proceed to
-EVAP pressure increases by 0.3 kPa (2.25
mmHg) or more within 10 seconds of
proceeding from step 2/5 to step 3/5Not yet determined A
P2420No variation in EVAP pressure even after
proceeding from step 2/5 to step 3/5Vent valve stuck open (vent) B
P0451No variation in EVAP pressure during steps
1/5 through 3/5Pressure sensor malfunction C
Go to step 20
Go to step 30

ES–4282GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Wait until the EVAP pressure change is less than 0.1 kPa
(0.75 mmHg) for 30 seconds.
(b) Measure the EVAP pressure and record it.
HINT:
A few minutes are required for the EVAP pressure to
become saturated. When there is little fuel in the fuel
tank, it takes up to 15 minutes.
NEXT
8PERFORM EVAP SYSTEM CHECK (STEP 3/5)
G038126E08

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–429
ES
(a) Check the EVAP pressure in step 4/5.
Result
*: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
B
C
A
9PERFORM EVAP SYSTEM CHECK (STEP 4/5)
G036776E16
DTC* Test Result Suspected Trouble Area Proceed to
-EVAP pressure increases by 0.3 kPa (2.25
mmHg) or more within 10 seconds of
proceeding from step 3/5 to step 4/5Not yet determined A
P0441EVAP pressure increases by 0.3 kPa (2.25
mmHg) or more within 10 seconds of
proceeding from step 3/5 to step 4/5Problems in EVAP hose between purge VSV
and intake manifoldB
P0441Variation in EVAP pressure is less than 0.3
kPa (2.25 mmHg) for 10 seconds, after
proceeding from step 3/5 to step 4/5Purge VSV stuck closed C
Go to step 15
Go to step 12

ES–4302GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Check the EVAP pressure in step 5/5.
(b) Compare the EVAP pressure in step 3/5 and the second
0.02 inch leak pressure standard (step 5/5).
Result
*: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
A
B
10PERFORM EVAP SYSTEM CHECK (STEP 5/5)
G036782E12
DTC* Test Result Suspected Trouble Area Proceed to
-EVAP pressure (step 3/5) lower than second
0.02 inch leak pressure standard (step 5/5)Not yet determined (no leakage from EVAP
system)A
P0441 and P0455EVAP pressure (step 3/5) higher than
[second 0.02 inch leak pressure standard
(step 5/5) x 0.2]• Purge VSV stuck open
• EVAP gross leakB
P0456EVAP pressure (step 3/5) higher than second
0.02 inch leak pressure standard (step 5/5)EVAP small leak B
Go to step 36
Go to step 12

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–431
ES
(a) Check the EVAP pressure in step 3/5.
Result
*: The DTCs related to the EVAP system are displayed
on the intelligent tester when checking.
HINT:
The first 0.02 inch leak pressure standard is the value
determined in step 2/5.
A
B
11PERFORM EVAP SYSTEM CHECK (STEP 3/5)
G036788E07
DTC* Test Result Suspected Trouble Area Proceed to
P043FEVAP pressure is less than [0.02 inch leak
pressure standard] measured in step 2/50.02 inch orifice high-flow A
P2401EVAP pressure is almost the same as [0.02
inch leak pressure standard] measured in
step 2/5Vacuum pump stuck OFF B
Go to step 30
Go to step 23

ES–4322GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Select the following menu items on the tester:
DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST /
EVAP VSV (ALONE).
(b) Disconnect the hose (connected to the canister) from the
purge VSV.
(c) Start the engine.
(d) Using the tester, turn off the purge VSV (EVAP VSV:
OFF).
(e) Confirm that the purge VSV has no suction with your
fingers.
(f) Using the tester, turn on the purge VSV (EVAP VSV:
ON).
(g) Confirm that the purge VSV has suction with your
fingers.
Result
(h) Reconnect the hose.
B
C
A
(a) Check that the fuel tank cap is correctly installed and
confirm the fuel tank cap meets OEM specification.
HINT:
If an EVAP tester is available, check the fuel tank cap
using the tester.
(1) Tighten the fuel tank cap
(2) Remove the fuel tank cap and install it onto the fuel
tank cap adaptor.
(3) Connect the EVAP tester pump hose to the adaptor,
and pressurize the cap to 3.2 to 3.7 kPa (24 to 28
mmHg) using an EVAP tester pump.
(4) Seal the adaptor and wait for 2 minutes.
(5) Check the pressure. If the pressure is 2 kPa (15
mmHg) or more, the fuel tank cap is normal.
12PERFORM ACTIVE TEST BY INTELLIGENT TESTER (PURGE VSV)
A136286E01
Test Result Suspected Trouble Area Proceed to
No suction when purge VSV
turned OFF, and suction
applied when turned ON-A
Suction applied when purge
VSV turned OFFPurge VSV stuck open B
No suction when purge VSV
turned ON• Purge VSV stuck closed
• Problems with EVAP
hose between purge VSV
and throttle bodyC
Go to step 14
Go to step 15
13CHECK FUEL TANK CAP ASSEMBLY

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–433
ES
Result
A
B
C
(a) Turn the ignition switch off.
(b) Disconnect the V3 purge VSV connector.
(c) Disconnect the hose (connected to the canister) from the
purge VSV.
(d) Start the engine.
(e) Confirm that the purge VSV has no suction with your
fingers.
Result
(f) Reconnect the purge VSV connector.
(g) Reconnect the hose.
A
B
(a) Disconnect the hose (connected to the throttle body)
from the purge VSV.
(b) Start the engine.
(c) Confirm that the hose has suction with your fingers.
Result
(d) Reconnect the hose.
B
Test Result Suspected Trouble Area Proceed to
Fuel tank cap correctly installed - A
Fuel tank cap loose• Fuel tank cap improperly installed
• Defective fuel tank cap
• Fuel tank cap does not meet OEM
specificationsB
No fuel tank cap - C
Go to step 29
Go to step 27
Go to step 28
14INSPECT PURGE VSV
A136287E01Test Result Suspected Trouble Area Proceed to
No suction ECM A
Suction applied Purge VSV B
Go to step 35
Go to step 31
15CHECK EVAP HOSE (PURGE VSV - THROTTLE BODY)
A136288E01
Test Result Suspected Trouble Area Proceed to
Suction applied - A
No suction• Throttle body
• EVAP hose between
purge VSV and throttle
bodyB
Go to step 26

ES–4342GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
A
(a) Remove the purge VSV.
(b) Apply battery voltage to the terminals of the purge VSV.
(c) Using compressed air, confirm that air flows from port A
to port B.
Result
(d) Install the purge VSV.
B
A
(a) Disconnect the V3 purge VSV connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage between terminal 1 of the purge
VSV connector and body ground.
Result
(d) Reconnect the purge VSV connector.
B
A
16INSPECT VACUUM SWITCHING VALVE NO. 1 (PURGE VSV)
A136289E01
Test Result Suspected Trouble Area Proceed to
Air flows - A
No air flow Purge VSV B
Go to step 31
17CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV)
A052933E27
Test Result Suspected Trouble Area Proceed to
Between 11 V and 14 V - A
Other than result aboveWire harness or connectors
between purge VSV and ECMB
Go to step 32