TOYOTA SIENNA 2007 Service Repair Manual

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–205
ES
When multiple DTCs for misfiring cylinders are set, but DTC P0300 is not set, it indicates that misfires
have been detected in different cylinders at different times. DTC P0300 is only set when several misfiring
cylinders are detected at the same time.
MONITOR DESCRIPTION
The ECM illuminates the MIL and sets a DTC when either one of the following conditions, which could
cause emission deterioration, is detected (2 trip detection logic).
• Within the first 1000 crankshaft revolutions of the engine starting, an excessive misfiring rate
(approximately 20 to 50 misfires per 1000 crankshaft revolutions) occurs once.
• An excessive misfiring rate (approximately 20 to 50 misfires per 1,000 crankshaft revolutions) occurs a
total of 4 times.
The ECM flashes the MIL and sets a DTC when either one of the following conditions, which could cause
the Three-Way Catalytic Converter (TWC) damage, is detected (2 trip detection logic).
• At a high engine rpm, a catalyst damage misfire, which monitored every 200 crankshaft revolutions,
occurs once.
• At a normal engine rpm, a catalyst damage misfire, which monitored every 200 crankshaft revolutions,
occurs 3 times.
HINT:
If a catalyst damage misfire occurs, the ECM informs the driver by flashing the MIL.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
Misfire:
Monitor period of emission-related-misfire:
Related DTCsP0300: Multiple cylinder misfire
P0301: Cylinder 1 misfire
P0302: Cylinder 2 misfire
P0303: Cylinder 3 misfire
P0304: Cylinder 4 misfire
P0305: Cylinder 5 misfire
P0306: Cylinder 6 misfire
Required Sensors / Components (Main) Injector, Ignition coil, Spark plug
Required Sensors / Components (Related)Crankshaft, Camshaft, Engine coolant temperature and intake air temperature
sensors and Mass air flow meter
Frequency of Operation Continuous
Duration1000 to 4000 crankshaft revolutions: Emission related misfire
200 to 600 crankshaft revolutions: Catalyst damaged misfire
MIL Operation2 driving cycles: Emission related misfire
MIL flashes immediately: Catalyst damaged misfire
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentP0100, 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),
P0327, P0328, P0332, P0333 (Knock Sensor), P0335 (CKP Sensor), P0340, (CMP
Sensor), P0500 (VSS)
Battery voltage 8 V or more
VVT system No operate by scan tool
Engine RPM 450 to 6500 rpm
Either of the following conditions is met Condition (a) or (b)
(a) Engine start ECT More than -7
C (19F)
(b) ECT More than 20
C (68F)
Fuel-cut OFF
First 1000 revolutions after engine start, or check mode Crankshaft 1000 revolutions

ES–2062GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
Monitor period of catalyst-damage-misfire (MIL blinks):
TYPICAL MALFUNCTION THRESHOLDS
Monitor period of emission-related-misfire:
Monitor period of catalyst-damage-misfire (MIL blinks):
MONITOR RESULT
Refer to CHECKING MONITOR STATUS (See page ES-19).
WIRING DIAGRAM
Refer to DTC P0351 for wiring diagram of the ignition system (See page ES-238).
Except above Crankshaft 1000 revolutions x 4
All of the following conditions 1, 2 and 3 are met Crankshaft 200 revolutions
1. Driving cycle 1st
2. Check mode OFF
3. Engine RPM Less than 2600 rpm
Except above (MIL blinks immediately) Crankshaft 200 revolutions x 3
Misfire rate 1% or more
Number of misfire per 200 revolutions 94 or more (varies with intake air amount and RPM)
Paired cylinders misfire (MIL blinks immediately) Detected

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–207
ES
CONFIRMATION DRIVING PATTERN
1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Turn the tester on.
4. Record the DTC(s) and freeze frame data.
5. Using the tester, switch the ECM from normal mode to check mode (See page ES-43).
6. Read the misfire counts of each cylinder (CYL #1 to #6) with the engine in an idling condition. If any
misfire count is displayed, skip the following confirmation driving pattern.
A162495E02

ES–2082GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
7. Drive the vehicle several times with the conditions, such as engine rpm and engine load, shown in
MISFIRE RPM and MISFIRE LOAD in the Data List.
HINT:
• In order to store misfire DTCs, it is necessary to operate the vehicle for the period of time shown in
the table below, using the MISFIRE RPM and MISFIRE LOAD in the Data List.
8. Check whether misfires have occurred by checking DTCs and freeze frame data.
HINT:
Do not turn the ignition switch off until the stored DTC(s) and freeze frame data have been recorded.
When the ECM returns to normal mode (default), the stored DTC(s), freeze frame data and other data
will be erased.
9. Record the DTC(s), freeze frame data and misfire counts.
10.Turn the ignition switch OFF and wait for at least 5 seconds.
INSPECTION PROCEDURE
HINT:
• If any DTCs other than misfire DTCs are output, troubleshoot those DTCs first.
• Read freeze frame data using the intelligent tester or Techstream. Freeze frame data records the
engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help
determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel
ratio was lean or rich, and other data from the time the malfunction occurred.
• If the misfire does not recur when the vehicle is brought to the workshop, reproduce the conditions
stored in the ECM as freeze frame data.
• If the misfire still cannot be reproduced even though the conditions stored in the ECM as freeze frame
data have been reproduced, one of the following factors is considered to be a possible cause of the
problem:
(a) There was insufficient fuel volume in the tank.
(b) Improper fuel is used.
(c) The spark plugs have been contaminated.
• After finishing repairs, check the misfire counts of the cylinders (CYL #1, #2, #3, #4, #5, #6).
• Be sure to confirm that no misfiring cylinder DTCs are set again by conducting the confirmation driving
pattern after finishing repairs.
• For 6 and 8 cylinder engines, the ECM intentionally does not set the specific misfiring cylinder DTCs at
high engine RPM. If misfires occur only in high engine RPM areas, only DTC P0300 is set.
In the event of DTC P0300 being present, perform the following operations:
(a) Clear the DTC (See page ES-39).
(b) Start the engine and conduct the confirmation driving pattern.
(c) Read the misfiring rates of each cylinder or DTC(s) using the tester.
(d) Repair the cylinder(s) that has a high misfiring rate or is indicated by the DTC.
(e) After finishing repairs, conduct the confirmation driving pattern again, in order to verify that DTC
P0300 is not set.
• When one of SHORT FT #1, LONG FT #1, SHORT FT #2 or LONG FT #2 in the freeze frame data is
outside the range of +/-20%, the air-fuel ratio may be Rich (-20% or less) or Lean (+20% or more).
• When the COOLANT TEMP in the freeze frame data is less than 75
C (167F), the misfire have
occurred only while warming up the engine.
Engine RPM Duration
Idling 3.5 minutes or more
1000 3 minutes or more
2000 1.5 minutes or more
3000 1 minute or more

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–209
ES
(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 P0300, P0301, P0302, P0303,
P0304, P0305 and P0306 are output, troubleshoot those
DTCs first.
HINT:
If any DTCs other than P0300, P0301, P0302, P0303, P0304,
P0305 and P0306 are output, troubleshoot those DTCs first.
B
A
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / MISFIRE / MISFIRE
RPM and MISFIRE LOAD.
(d) Read and note the MISFIRE RPM and MISFIRE LOAD
values.
HINT:
The MISFIRE RPM and MISFIRE LOAD values indicate
the vehicle conditions under which the misfire occurred.
NEXT
OK:
PCV hose is correctly connected and is not damaged.
NG
OK
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO MISFIRE CODES)
Display (DTC Output) Proceed to
P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 A
P0300, P0301, P0302, P0303, P0304, P0305 and/or P0306 and other DTCs B
GO TO DTC CHART (See page ES-56)
2READ VALUE OF INTELLIGENT TESTER (MISFIRE RPM AND MISFIRE LOAD)
3CHECK PCV HOSE CONNECTIONS
REPAIR OR REPLACE PCV HOSE

ES–2102GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / CAT OT MF F/C.
(d) Read the value displayed on the tester.
Result
B
A
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / PRHBH CAT OT
F/C.
(d) Perform the Active Test.
NOTICE:
When performing the Active Test, make sure the
vehicle is stopped and either idling or being revved
within 3000 rpm.
NEXT
(a) Enter the following menus:
– Select: DIAGNOSIS / ENHANCED OBD II / DATA LIST /
USER DATA / CYL #1, #2, #3, #4, #5 and #6.
(b) Read each value for CYL #1 to #6 displayed on the tester.
If no misfire counts occur in any cylinders, perform the
following procedures:
(1) Start the engine and let it idle.
(2) Move the shift lever to the D position.
(3) Check the CYL #1 to #6.
(4) If misfire counts are still not displayed, perform steps
(c) and (d).
(c) Drive the vehicle with the MISFIRE RPM and MISFIRE
LOAD noted in the "READ VALUE USING INTELLIGENT
TESTER (MISFIRE RPM and MISFIRE LOAD )" procedures
above.
4READ VALUE OF INTELLIGENT TESTER
Data List Tester Display Proceed to
CAT OT MF F/CAVA I L A
NOT AVL B
Go to step 6
5PERFORM ACTIVE TEST BY INTELLIGENT TESTER
6READ VALUE OF INTELLIGENT TESTER

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–211
ES
(d) Read the CYL #1 to #6 or DTCs displayed on the tester.
Result
HINT:
• If it is difficult to reproduce misfires for each cylinder, check
the Data List item called MISFIRE MARGIN. Try to find
vehicle driving conditions that lower the MISFIRE
MARGIN value. Values above 30% are considered normal.
• If the freeze frame data's record of the ECT is below 75
C
(167
F), the misfire may be detected only when the engine
is cold.
• If the freeze frame data's record of the ENG RUN TIME is
below 120 seconds, the misfire may be detected
immediately after the engine is started.
B
A
(a) Remove the ignition coil and the spark plug of the
misfiring cylinder.
(b) Measure the spark plug electrode gap.
Maximum gap:
1.3 mm (0.0512 in.)
(c) Check the electrode for carbon deposits.
Recommended spark plug:
NOTICE:
If the electrode gap is larger than standard, replace
the spark plug. Do not adjust the electrode gap.
NG
OK
(a) Disconnect the injector connectors to prevent the engine
from starting.
CAUTION:
Always disconnect all injector connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
(b) Remove the ignition coil from the cylinder head.
(c) Install the spark plug onto the ignition coil.
(d) Attach the spark plug assembly to the cylinder head.
Misfire Count Proceed to
Most misfires occur in only 1 or 2 cylinders A
3 cylinders or more have equal misfire counts B
Go to step 18
7CHECK SPARK PLUG
A126880E03
Manufacturer Product
DENSO FK20HR11
REPLACE SPARK PLUG (See page IG-10)
8CHECK FOR SPARKS AND IGNITION

ES–2122GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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(e) Crank the engine for less than 2 seconds and check the
spark.
OK:
Sparks jump across electrode gap.
(f) Install the ignition coil.
(g) Reconnect the injector connectors.
NG
OK
(a) Measure the cylinder compression pressure of the
misfiring cylinder (See page EM-3).
NG
OK
(a) Disconnect the injector connector (of the misfiring
cylinder).
(b) Disconnect the E11 ECM connector.
(c) Turn the ignition switch to the ON position.
(d) Measure the voltage and resistance according to the
value(s) in the table below.
(e) Measure the resistance and voltage according to the
values in the table below.
Standard:
Cylinder No. 1
Cylinder No. 2
Cylinder No. 3
Cylinder No. 4 Go to step 29
9CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER
CHECK ENGINE TO DETERMINE CAUSE OF
LOW COMPRESSION
10CHECK HARNESS AND CONNECTOR (ECM - INJECTOR)
A114616E08
Tester Connection Specified Condition
I23-1 - Ground 11 to 14 V
I23-2 - Ground 10 k
or higher
I23-1 - #10 (E11-2) Below 1
Tester Connection Specified Condition
I24-1 - Ground 11 to 14 V
I24-2 - Ground 10 k
or higher
I24-1 - #20 (E11-3) Below 1
Tester Connection Specified Condition
I25-1 - Ground 11 to 14 V
I25-2 - Ground 10 k
or higher
I25-1 - #30 (E11-4) Below 1
Tester Connection Specified Condition
I26-1 - Ground 11 to 14 V

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–213
ES
Cylinder No. 5
Cylinder No. 6
NG
OK
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the
table below.
Standard voltage
NG
OK
(a) Check the injector injection (whether fuel volume is high
or low, and whether injection pattern is poor) (See page
FU-16).
NG
OK
I26-2 - Ground 10 k or higher
I26-1 - #40 (E11-5) Below 1
Tester Connection Specified Condition
I27-1 - Ground 11 to 14 V
I27-2 - Ground 10 k
or higher
I27-1 - #50 (E11-6) Below 1
Tester Connection Specified Condition
I28-1 - Ground 11 to 14 V
I28-2 - Ground 10 k
or higher
I28-1 - #60 (E11-7) Below 1
REPAIR OR REPLACE HARNESS OR
CONNECTOR
Tester Connection Specified Condition
11INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, #30, #40, #50 AND /OR #60
VOLTAGE)
A162489E04
Tester Connection Specified Condition
#10 (E11-2) - E01 (E9-7) 9 to 14 V
#20 (E11-3) - E01 (E9-7) 9 to 14 V
#30 (E11-4) - E01 (E9-7) 9 to 14 V
#40 (E11-5) - E01 (E9-7) 9 to 14 V
#50 (E11-6) - E01 (E9-7) 9 to 14 V
#60 (E11-7) - E01 (E9-7) 9 to 14 V
REPAIR OR REPLACE HARNESS OR
CONNECTOR (BATTERY - ECM)
12CHECK FUEL INJECTOR OF MISFIRING CYLINDER
REPLACE FUEL INJECTOR ASSEMBLY (See
page FU-16)

ES–2142GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Check the intake system for vacuum leakage (See page
IT-1).
OK:
No leakage from intake system.
NG
OK
NG
OK
(a) Check the fuel pressure (See page FU-7).
NG
OK
(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 / DATA LIST / PRIMARY /
COOLANT TEMP.
(e) Read the COOLANT TEMP twice, when the engine is
both cold and warmed up.
Standard:
With cold engine:
Same as ambient air temperature.
With warm engine:
Between 75
C and 95C (167F and 203F).
NG
OK
(a) Connect the intelligent tester to the DLC3.
13CHECK INTAKE SYSTEM
REPAIR OR REPLACE INTAKE SYSTEM
14CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
(See page ES-92)
ADJUST VALVE TIMING
15CHECK FUEL PRESSURE
CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE
AND FILTER
16READ VALUE OF INTELLIGENT TESTER (COOLANT TEMP)
REPLACE ENGINE COOLANT
TEMPERATURE SENSOR
17READ VALUE OF INTELLIGENT TESTER (MASS AIR FLOW METER)