2007 TOYOTA SIENNA check engine

ES–142GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
CHECK FOR INTERMITTENT
PROBLEMS
1. CHECK FOR INTERMITTENT PROBLEMS
HINT:
For use of the intelligent tester only:
Inspect the vehicle's ECM using check mode.
Intermittent problems are easier to detect with an
intelligent tester when the ECM is in check mode. In
check mode, the ECM uses 1 trip detection logic, which
is more sensitive to malfunctions than normal mode
(default), which uses 2 trip detection logic.
(a) Clear the DTCs (See page ES-39).
(b) Switch the ECM from normal mode to check mode
using an intelligent tester (See page ES-43).
(c) Perform a simulation test (See page IN-35).
(d) Check and wiggle the harness(es), connector(s)
and terminal(s) (See page IN-30).

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–15
ES
BASIC INSPECTION
When a malfunction is not confirmed by the DTC check,
troubleshooting should be carried out in all circuits
considered to be possible causes of the problem. In many
cases, by carrying out the basic engine check shown in the
following flowchart, the location of the problem can be found
quickly and efficiently. Therefore, using this check is essential
when engine troubleshooting.
NOTICE:
Carry out this check with the engine stopped and ignition
switch off.
Result
NG
OK
NG
OK
NG
OK
(a) Visually check that the air filter is not excessively
contaminated with dirt or oil.
NG
OK
(a) Check the idling speed (See page EM-2).
1CHECK BATTERY VOLTAGE
Result Proceed to
11 V or more OK
Below 11 V NG
CHARGE OR REPLACE BATTERY
2CHECK WHETHER ENGINE CRANKS
PROCEED TO PROBLEM SYMPTOMS
TA B L E
3CHECK WHETHER ENGINE STARTS
GO TO STEP 6
4CHECK AIR FILTER
REPLACE AIR FILTER
5CHECK IDLING SPEED

ES–162GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NG
OK
(a) Check the fuel pressure (See page FU-7).
NG
OK
(a) Check for sparks (See page ES-217).
NG
OKTROUBLESHOOT IDLING SPEED AND
PROCEED TO NEXT STEP
6CHECK FUEL PRESSURE
TROUBLESHOOT FUEL PRESSURE AND
PROCEED TO NEXT STEP
7CHECK FOR SPARKS
TROUBLESHOOT SPARK AND PROCEED
TO NEXT STEP
PROCEED TO PROBLEM SYMPTOMS TABLE

ES–4862GR-FE ENGINE CONTROL SYSTEM – CAMSHAFT TIMING OIL CONTROL VALVE
ASSEMBLY
ES
ON-VEHICLE INSPECTION
1. INSPECT CAMSHAFT TIMING CONTROL VALVE
ASSEMBLY
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Start the engine and warm it up.
(d) Select the intelligent tester from the ACTIVE TEST
menu.
(e) Check the engine speed when the OCV (camshaft
timing oil control valve) is operated by the intelligent
tester.
OK
E144486E01
Condition Specified Condition
VVT system is OFF (OCV is OFF) Normal engine speed
VVT system is ON (OCV is ON) Rough idle or engine stalled

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–17
ES
REGISTRATION
NOTICE:
The Vehicle Identification Number (VIN) must be input
into the replacement ECM.
HINT:
The VIN is a 17-digit alphanumeric vehicle identification
number. The intelligent tester is required to register the VIN.
1. INPUT INSTRUCTIONS
(a) The general VIN input instructions using the
intelligent tester are shown below:
(b) The arrow buttons (UP, DOWN, RIGHT and LEFT)
and numerical buttons (0 to 9) are used to input the
VIN.
(c) Cursor Operation
To move the cursor around the tester screen, press
the RIGHT and LEFT buttons.
(d) Alphabetical Character Input
(1) Press the UP and DOWN buttons to select the
desired alphabetical character.
(e) Numerical Character Input
(1) Press the numerical button corresponding to
the number that you want to input.
HINT:
Numerical characters can be selected by using
the UP and DOWN buttons.
(f) Correction
(1) When correcting the input character(s), put the
cursor onto the character using the RIGHT and
LEFT buttons.
(2) Select or input the correct character using the
UP and DOWN buttons, or the numerical
buttons.
(g) Finishing Input Operation
(1) Make sure that the input VIN matches the
vehicle VIN after input.
(2) Press the ENTER button on the tester.
2. READ VIN (Vehicle Identification Number)
(a) The VIN reading process is shown in the flowchart
below. Reading the VIN stored in the ECM is
necessary when comparing it to the VIN provided
with the vehicle.
(b) Read the VIN using the intelligent tester.
(c) Check the vehicle's VIN.
(d) Connect the intelligent tester to the DLC3.
(e) Turn the ignition switch to the ON position.
(f) Turn the tester ON.

2GR-FE ENGINE CONTROL SYSTEM – THROTTLE BODYES–493
ES
ON-VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
(a) Listen to the throttle control motor operating sounds.
(1) Turn the ignition switch to the ON position.
(2) When pressing the accelerator pedal position
sensor lever, listen to the running motor. Make
sure that no friction noise comes from the
motor.
If friction noise exists, replace the throttle body.
(b) Inspect the throttle position sensor.
(1) Connect the intelligent tester to the DLC3.
(2) Turn the ignition switch to the ON position.
(3) Check that the MIL turns off.
(4) Under CURRENT DATA, the throttle valve
opening percentage (THROTTLE POS) should
be within the standard range below.
Standard throttle valve opening percentage:
60% or more
If the percentage is less than 60%, replace the
throttle body.
NOTICE:
When checking the throttle valve opening
percentage, the transmission should be in
neutral.
E144486E01

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