2007 TOYOTA SIENNA Service Repair Manual

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Page 697 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–4042GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
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(a) Read the DTCs using the intelligent tester.
(b) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / PENDIN

Page 698 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–4122GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
RELATED DTCS
If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.
EVAP System
DTC Monitoring Item

Page 699 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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 corresp

Page 700 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–4142GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(2) Turn the ignition switch off and wait for 6 hours (8 or 10.5 hours).
HINT:
Do not start the engine until checking MONITOR STATUS. If the en

ES–4142GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(2) Turn the ignition switch off and wait for 6 hours (8 or 10.5 hours).
HINT:
Do not start the engine until checking MONITOR STATUS. If the engine is started, the steps
described above must be repeated.
(c) Monitor Status
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch to the ON position and turn the tester on.
(3) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.
(4) Check the "Monitor Status" displayed on the tester.
HINT:
If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have
been met, and perform "Monitor Conditions" again.
2. PURGE FLOW MONITOR CONFIRMATION (P0441)
HINT:
Perform this monitor confirmation after the Key-Off Monitor Confirmation shows COMPL (complete).
(a) Preconditions
The monitor will not run unless:
• The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)
• The ECT is between 4.4
C and 35C (40F and 95F)
• The IAT is between 4.4
C and 35C (40F and 95F)
(b) Monitor Conditions
(1) Release the pressure from the fuel tank by removing and reinstalling the fuel tank cap.
(2) Warm the engine up until the ECT reaches more than 75
C (167F).
(3) Increase the engine speed to 3000 rpm once.
(4) Allow the engine to idle and turn the A/C ON for 1 minute.
(c) Monitor Status
(1) Turn the ignition switch off.
(2) Connect the intelligent tester to the DLC3.
(3) Turn the ignition switch to the ON position and turn the tester on.
(4) Select the following menu items: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.
(5) Check the "Monitor Status" displayed on the tester.
HINT:
If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have
been met, and perform "Monitor Conditions" again.
MONITOR RESULT
Refer to Checking Monitor Status for detailed information (See page ES-19).
The test value and test limit information are described as shown in the following table. This information is
included in MONITOR RESULT of the emissions-related DTC sections:
– MID (Monitor Identification Data) is assigned to each emissions-related component.
– TID (Test Identification Data) is assigned to each test value.
– Scaling is used to calculate the test value indicated on generic OBD II scan tools.
Thermostat
MID TID Scaling Description of Test Value Minimum Test Limit Maximum Test Limit
$3D $C9 Multiply by 0.01 [kPa]Test value for small leak (P0456)
Refer to pressure D*Minimum test limit for
small leakMaximum test limit for
small leak
$3D $CA Multiply by 0.01 [kPa]Test value for gross leak (P0455)
Refer to pressure E*Minimum test limit for
gross leakMaximum test limit for
gross leak
$3D $CB Multiply by 0.01 [kPa]Test value for vacuum pump stuck OFF
(P2401)
Refer to pressure A*Minimum test limit for
vacuum pump stuck
OFFMaximum test limit for
vacuum pump stuck
OFF
$3D $CD Multiply by 0.01 [kPa]Test value for vacuum pump stuck ON
(P2402)
Refer to pressure A*Minimum test limit for
vacuum pump stuck
ONMaximum test limit for
vacuum pump stuck
ON

Page 701 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–415
ES
$3D $CE Multiply by 0.01 [kPa]Test value for vent valve stuck OFF
(vent) (P2420)
Refer to pressure C*Minimum test limit for
vent valve stuck

Page 702 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–4162GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
* Pressures A to G are indicated as shown in the diagram below.
G038136E05

Page 703 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–417
ES
DESCRIPTION
While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is
opened by the ECM and fuel

Page 704 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–4182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is
allowed into the canister through the vent v

ES–4182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
The purge flow volume is also determined by the intake manifold pressure. Atmospheric pressure is
allowed into the canister through the vent valve to ensure that the purge flow is maintained when negative
pressure (vacuum) is applied to the canister.
The following two monitors run to confirm appropriate EVAP system operation.
1. Key-off monitor
This monitor checks for EVAP (Evaporative Emission) system leaks and pump module malfunctions.
The monitor starts 5 hours* after the ignition switch is turned off. More than 5 hours are required to
allow the fuel to cool down to stabilize the Fuel Tank Pressure (FTP), thus making the EVAP system
monitor more accurate.
The electric vacuum pump creates negative pressure (vacuum) in the EVAP system, and the
pressure is measured. Finally, the ECM monitors for leaks from the EVAP system and malfunctions in
both the pump module and purge VSV, based on the EVAP pressure.
HINT:
*: 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. Purge flow monitor
The purge flow monitor consists of the two monitors. The 1st monitor is always conducted every time
and the 2nd monitor is activated if necessary.
• The 1st monitor
While the engine is running and the purge VSV (Vacuum Switching Valve) is ON (open), the ECM
monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not
created, the ECM begins the 2nd monitor.
• The 2nd monitor
The vent valve is turned OFF (open) and the EVAP pressure is then measured. If the variation in
the pressure is less than 0.5 kPa (3.75 mmHg), the ECM interprets this as the purge VSV being
stuck closed, and illuminates the MIL and sets DTC P0441 (2 trip detection logic).
Atmospheric pressure check:
In order to ensure reliable malfunction detection, the variation between the atmospheric pressures,
before and after conduction of the purge flow monitor, is measured by the ECM.
Component Operation
Canister Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank.
A126271E05

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