TOYOTA SIENNA 2007 Service Repair Manual

2GR-FE ENGINE CONTROL SYSTEM – THROTTLE BODYES–495
ES
9. REMOVE THROTTLE BODY
(a) Disconnect the throttle body connector and clamp.
(b) Disconnect the 2 water by-pass hoses from the
throttle body.
(c) Remove the 4 bolts and throttle body.
(d) Remove the throttle body gasket from the intake air
surge tank.
INSPECTION
1. INSPECT THROTTLE BODY
(a) Using an ohmmeter, measure the resistance
between the terminals.
Standard resistance
If the result is not as specified, replace the throttle
body assembly.
INSTALLATION
1. INSTALL THROTTLE BODY
(a) Install a new throttle body gasket to the intake air
surge tank.
A135707
A135708
A135709
A090372
Symbols (Terminal No.) Resistance Temperature
M+ (2) - M- (1) 0.3 to 100
20C (68F)
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ES–4962GR-FE ENGINE CONTROL SYSTEM – THROTTLE BODY
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(b) Install the throttle body with the 4 bolts.
Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)
(c) Connect the 2 water by-pass hoses.
(d) Connect the throttle body connector and clamp.
2. INSTALL AIR CLEANER CASE SUB-ASSEMBLY (See
page EM-59)
3. INSTALL AIR CLEANER CAP SUB-ASSEMBLY
(a) Install the air cleaner cap sub-assembly with the 2
bolts.
(b) Connect the the vacuum hose (EVAP) to the air
cleaner hose.
(c) Install the No. 2 ventilation hose and air cleaner
hose band.
A135709
A135708
A135707
A135114
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2GR-FE ENGINE CONTROL SYSTEM – THROTTLE BODYES–497
ES
(d) Connect the 3 vacuum hoses.
4. INSTALL NO. 1 AIR CLEANER INLET (See page EM-
59)
5. INSTALL NO. 2 AIR CLEANER INLET (See page EM-
60)
6. ADD ENGINE COOLANT (See page CO-7)
7. INSPECT FOR ENGINE COOLANT LEAK (See page
CO-1)
8. INSTALL V-BANK COVER SUB-ASSEMBLY (See
page EM-63)
9. INSTALL FRONT OUTER COWL TOP PANEL SUB-
ASSEMBLY (See page EM-61)
10. INSTALL WINDSHIELD WIPER MOTOR ASSEMBLY
HINT:
(See page WW-5)
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ES–222GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
CHECKING MONITOR STATUS
The purpose of the monitor result (mode 06) is to allow
access to the results for on-board diagnostic monitoring tests
of specific components/systems that are not continuously
monitored. Examples are catalyst, evaporative emission
(EVAP) and thermostat.
The monitor result allows the OBD II scan tool to display the
monitor status, test value, minimum test limit and maximum
test limit. These data are displayed after the vehicle has been
driven to run the monitor.
When the test value is not between the minimum test limit
and maximum test limit, the ECM (PCM) interprets this as a
malfunction. When the component is not malfunctioning, if the
difference of the test value and test limit is very small, the
component will malfunction in the near future.
Perform the following instructions to view the monitor status.
Although the Lexus diagnostic tester is used in the following
instructions, it can be checked using a generic OBD II scan
tool. Refer to your scan tool operator's manual for specific
procedures.
1. PERFORM MONITOR DRIVE PATTERN
The monitor results and test values can be checked with
the OBD II scan tool or the intelligent tester. The engine
control module (ECM) monitors the emissions-related
components such as the thermostat, catalyst converter
and evaporative emissions (EVAP), and determines
whether they are functioning normally or not. When
monitoring is finished, the ECM stores the monitor
results and the test values. The monitor result indicates
whether the component is functioning normally or not.
The test value is the value that was used to determine
the monitor result. If the test value is outside of the test
limit (malfunction criterion), the ECM determines the
component is malfunctioning. Some emissions-related
components have multiple test values to determine
monitor result. If one of these test values is outside of the
test limit, the ECM determines the component is
malfunctioning.
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Clear the DTCs.
(d) Run the vehicle in accordance with the applicable
drive pattern described in READINESS MONITOR
DRIVE PATTERN (See page ES-22). DO NOT turn
the ignition switch off.
NOTICE:
The test results will be lost if the ignition switch
is turned off.

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–23
ES
2. ACCESS MONITOR RESULT
(a) Select the following menus on the intelligent tester:
DIAGNOSIS, ENHANCED OBDII, MONITOR INFO
and MONITOR RESULT. The monitor status
appears after the component name.
• INCMP: The component has not been monitored
yet.
• PASS: The component is functioning normally.
• FAIL: The component is malfunctioning.
(b) Confirm that the component is either PASS or FAIL.
(c) Select the component and press ENTER. The
accuracy test value appears if the monitor status is
either PASS or FAIL.
HINT:
The monitor result might be PASS on rare
occasions even if the Malfunction Indicator Lamp
(MIL) is illuminated. This indicates that the system
was malfunctioning in the previous driving cycle.
This might be caused by an intermittent problem.
3. CHECK COMPONENT STATUS
(a) Compare the test value with the minimum test limit
(MIN LIMIT) and maximum test limit (MAX LIMIT).
(b) If the test value is between the minimum test limit
and maximum test limit, the component is
functioning normally. If not, the component is
malfunctioning. The test value is usually significantly
higher or lower than the test limit. If the test value is
on the borderline of the test limit, the component will
malfunction in the near future.
HINT:
The monitor result might be PASS on rare occasions even if
the Malfunction Indicator Lamp (MIL) is illuminated. This
indicates that the system was malfunctioning in the previous
driving cycle. This might be caused by an intermittent
problem.
4. MONITOR RESULT INFORMATION
If you use a generic scan tool, multiply the test value by
the scaling value listed below.
A/F Sensor Bank 1
HO2S Bank 1 Sensor 2
A/F Sensor Bank 2
Monitor ID Test ID Scaling Unit Description
$01 $8E Multiply by 0.0003 No dimension A/F sensor deterioration level
$01 $91 Multiply by 0.004 mA A/F sensor current
Monitor ID Test ID Scaling Unit Description
$02 $07 Multiply by 0.001 V Minimum sensor voltage
$02 $08 Multiply by 0.001 V Maximum sensor voltage
$02 $8F Multiply by 0.003 g Maximum oxygen storage capacity
Monitor ID Test ID Scaling Unit Description
$05 $8E Multiply by 0.0003 No dimension A/F sensor deterioration level
$05 $91 Multiply by 0.004 mA A/F sensor current

ES–242GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
HO2S Bank 2 Sensor 2
Catalyst-Bank 1
Catalyst-Bank 2
EVAP
Misfire
Monitor ID Test ID Scaling Unit Description
$06 $07 Multiply by 0.001 V Minimum sensor voltage
$06 $08 Multiply by 0.001 V Maximum sensor voltage
$06 $8F Multiply by 0.003 g Maximum oxygen storage capacity
Monitor ID Test ID Scaling Unit Description
$21 $A9 Multiply by 0.003 No dimension Oxygen storage capacity of catalyst-bank 1
Monitor ID Test ID Scaling Unit Description
$22 $A9 Multiply by 0.003 No dimension Oxygen storage capacity of catalyst-bank 2
Monitor ID Test ID Scaling Unit Description
$3D $C9 Multiply by 0.001 kPa Test value for small leak (P0456)
$3D $CA Multiply by 0.001 kPa Test value for gross leak (P0455)
$3D $CB Multiply by 0.001 kPa Test value for leak detection pump OFF stuck (P2401)
$3D $CD Multiply by 0.001 kPa Test value for leak detection pump ON stuck (P2402)
$3D $CE Multiply by 0.001 kPa Test value for vent valve OFF stuck (P2420)
$3D $CF Multiply by 0.001 kPa Test value for vent valve ON stuck (P2419)
$3D $D0 Multiply by 0.001 kPa Test value for reference orifice low flow (P043E)
$3D $D1 Multiply by 0.001 kPa Test value for reference orifice high flow (P043F)
$3D $D4 Multiply by 0.001 kPa Test value for purge VSV close stuck (P0441)
$3D $D5 Multiply by 0.001 kPa Test value for purge VSV open stuck (P0441)
$3D $D7 Multiply by 0.001 kPa Test value for purge flow insufficient (P0441)
Monitor ID Test ID Scaling Unit Description
$A1 $0B Multiply by 1 TimeExponential Weighted Moving Average (EWMA) misfire for all
cylinders: Misfire counts for last ten driving cycles-Total
$A1 $0C Multiply by 1 TimeMisfire rate for all cylinders: Misfire counts for last/current driving
cycles-Total
$A2 $0B Multiply by 1 TimeEWMA misfire for cylinder 1: Misfire counts for last ten driving cycles-
To t a l
$A2 $0C Multiply by 1 TimeMisfire rate for cylinder 1: Misfire counts for last/current driving cycle-
To t a l
$A3 $0B Multiply by 1 TimeEWMA misfire for cylinder 2: Misfire counts for last ten driving cycles-
To t a l
$A3 $0C Multiply by 1 TimeMisfire rate for cylinder 2: Misfire counts for last/current driving cycle-
To t a l
$A4 $0B Multiply by 1 TimeEWMA misfire for cylinder 3: Misfire counts for last ten driving cycles-
To t a l
$A4 $0C Multiply by 1 TimeMisfire rate for cylinder 3: Misfire counts for last/current driving cycle-
To t a l
$A5 $0B Multiply by 1 TimeEWMA misfire for cylinder 4: Misfire counts for last ten driving cycles-
To t a l
$A5 $0C Multiply by 1 TimeMisfire rate for cylinder 4: Misfire counts for last/current driving cycle-
To t a l
$A6 $0B Multiply by 1 TimeEWMA misfire for cylinder 5: Misfire counts for last ten driving cycles-
To t a l
$A6 $0C Multiply by 1 TimeMisfire rate for cylinder 5: Misfire counts for last/current driving cycle-
To t a l
$A7 $0B Multiply by 1 TimeEWMA misfire for cylinder 6: Misfire counts for last ten driving cycles-
To t a l

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–25
ES
Rear Oxygen Sensor Heater
$A7 $0C Multiply by 1 TimeMisfire rate for cylinder 6: Misfire counts for last/current driving cycle-
To t a l
Monitor ID Test ID Scaling Unit Description
$42 $91 Multiply by 0.001 Ohm Oxygen sensor heater resistance bank 1 sensor 2
$46 $91 Multiply by 0.004 Ohm Oxygen sensor heater resistance bank 2 sensor 2 Monitor ID Test ID Scaling Unit Description

2GR-FE ENGINE CONTROL SYSTEM – ECMES–497
ES
ENGINE
2GR-FE ENGINE CONTROL SYSTEM
ECM
COMPONENTS
A162198E01

ES–4982GR-FE ENGINE CONTROL SYSTEM – ECM
ES
REMOVAL
1. REMOVE GLOVE COMPARTMENT DOOR
ASSEMBLY
(a) Push the right side wall and then push the left wall
to release the stoppers.
(b) Pull the glove compartment door sub-assembly
rearward to remove it.
2. REMOVE NO. 2 INSTRUMENT PANEL BOX
(a) Disengage the 2 claws and 4 clips, and remove the
No. 2 instrument panel box.
3. REMOVE ECM
(a) Disconnect the 5 ECM connectors.
(b) Remove the 2 nuts and ECM.
B066073E01
B066074
B066075E01
A162672

2GR-FE ENGINE CONTROL SYSTEM – ECMES–499
ES
4. REMOVE ECM (with 10 speakers system)
(a) Disconnect the 5 ECM connectors and 2 stereo
components amplifier connectors.
(b) Remove the 4 nuts and the ECM with the stereo
components amplifier.
INSTALLATION
1. INSTALL ECM
(a) Install the ECM with the 2 nuts.
Torque: 5.5 N*m (56 kgf*cm, 49 in.*lbf)
(b) Connect the 5 ECM connectors.
A162199
A162672