2007 TOYOTA SIENNA check engine

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–215
ES
(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 / MAF and
COOLANT TEMP.
(e) Allow the engine to idle until the COOLANT TEMP
reaches 75
C (167F) or more.
(f) Read the MAF with the engine in an idling condition and
at an engine speed of 2500 rpm.
Standard:
MAF while engine is idling:
Between 1.8 g/s and 4.7 g/s (shift position: N, A/
C: OFF).
MAF at engine speed of 2500 rpm:
Between 7.4 g/s and 18.9 g/s (shift position: N, A/
C: OFF).
NG
OK
(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
OKREPLACE MASS AIR FLOW METER
REPLACE ECM
18CHECK INTAKE SYSTEM
REPAIR OR REPLACE INTAKE SYSTEM
19CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN)
(See page ES-92)
ADJUST VALVE TIMING
20CHECK FUEL PRESSURE
CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE
AND FILTER

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–217
ES
(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.
(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
23CHECK SPARK PLUG
A126880E03
Manufacturer Product
DENSO FK20HR11
REPLACE SPARK PLUG (See page IG-10)
24CHECK FOR SPARKS AND IGNITION (SPARK TEST)
A136826
Go to step 29
25CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER
CHECK ENGINE TO DETERMINE CAUSE OF
LOW COMPRESSION

ES–2182GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(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
Cylinder No. 5
Cylinder No. 6
NG
26CHECK 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
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

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–219
ES
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
(a) Change the installed spark plug to a spark plug that
functions normally.
(b) Perform a spark test.
CAUTION:
Always disconnect all injector connectors.
NOTICE:
Do not crank the engine for more than 2 seconds.
(1) Install the spark plug to the ignition coil and connect
the ignition coil connector.
(2) Disconnect the injector connector.
(3) Ground the spark plug.
(4) Check if sparks occur while the engine is being
cranked.
27INSPECT 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)
28CHECK FUEL INJECTOR OF MISFIRING CYLINDER
REPLACE FUEL INJECTOR ASSEMBLY
REPLACE ECM
29CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER

ES–2202GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
OK:
Sparks jump across electrode gap.
NG
OK
NG
OK Go to step 30
REPLACE SPARK PLUG (See page IG-10)
30CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER
REPLACE ECM
REPLACE IGNITION COIL

ES–2222GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The knock sensor, located on the cylinder block, detects spark knock. When a spark knock occurs, the
piezoelectric element of the sensor vibrates. When the ECM detects a voltage in this frequency range, it
retards the ignition timing to suppress the spark knock.
The ECM also senses background engine noise with the knock sensor and uses this noise to check for
faults in the sensor. If the knock sensor signal level is too low for more than 10 seconds, or if the knock
sensor output voltage is outside the normal range, the ECM interprets this as a fault in the knock sensor
and sets a DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Knock Sensor Range Check (Low voltage) P0327 and P0332:
Knock Sensor Range Check (High voltage) P0328 and P0333:
Related DTCsP0327: Knock sensor (Bank 1) open/short (Low voltage)
P0328: Knock sensor (Bank 1) open/short (High voltage)
P0332: Knock sensor (Bank 2) open/short (Low voltage)
P0333: Knock sensor (Bank 2) open/short (High voltage)
Required Sensors / Components (Main) Knock sensor (Bank 1 and 2)
Required Sensors / Components (Related) -
Frequency of Operation Continuous
Duration 1 second
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Battery voltage 10.5 V or more
Time after engine start 5 seconds or more
Ignition switch ON
Starter OFF
Knock sensor voltage Less than 0.5 V
Knock sensor voltage More than 4.5 V

ES–2242GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the EA1 connector.
(b) Using lead wires, connect the connectors as follows.
(c) Warm up the engine.
(d) Run the engine at 3000 rpm for 10 seconds or more.
(e) Connect the intelligent tester to the DLC3.
(f) Turn the ignition switch to the ON position and turn the
intelligent tester on.
(g) Select the items: DIAGNOSIS / ENHANCED OBD II /
DTC INFO / CURRENT CODES.
(h) Read the DTCs.
Result
(i) Reconnect the EA1 connector.
B
A
1READ VALUE OF DTC OUTPUT (CHECK KNOCK SENSOR CIRCUIT)
G041090E10
Male Connector - Female Connector
Terminal 2 - Terminal 4
Terminal 1 - Terminal 3
Terminal 4 - Terminal 2
Terminal 3 - Terminal 1
Display Proceed to
DTCs that are same as when vehicle brought
in P0327, P0328
P0327, P0328 or P0332,
P0333
P0332, P0333A
DTCs that are different from when vehicle
brought in P0327, P0328
P0332, P0333 or
P0332, P0333 P0327, P0328B
Go to step 4

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–225
ES
(a) Disconnect the EA1 connector.
(b) Disconnect the E10 ECM connector.
(c) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Check for open
Check for short
(d) Reconnect the EA1 connector.
(e) Reconnect the ECM connector.
NG
OK
(a) Disconnect the E10 ECM connector.
(b) Turn the ignition switch to the ON position.
(c) Measure the voltage according to the value(s) in the
table below.
Standard voltage
(d) Reconnect the ECM connector.
NOTICE:
Fault may be intermittent. Check the wire harness
and connectors carefully and retest.
NG
2CHECK HARNESS OR CONNECTOR (EA1 CONNECTOR - ECM)
A114617E08
Tester Connection Specified Condition
EA1 female connector 2 - KNK1 (E10-29) Below 1
EA1 female connector 1 - EKNK (E10-28) Below 1
EA1 female connector 4 - KNK2 (E10-21) Below 1
EA1 female connector 3 - EKN2 (E10-20) Below 1
Tester Connection Specified Condition
EA1 female connector 2 or KNK1 (E10-29) - Body
ground10 k
or higher
EA1 female connector 1 or EKNK (E10-28) - Body
ground10 k
or higher
EA1 female connector 4 or KNK2 (E10-21) - Body
ground10 k
or higher
EA1 female connector 3 or EKN2 (E10-20) - Body
ground10 k
or higher
REPAIR OR REPLACE HARNESS OR
CONNECTOR (EA1 CONNECTOR - ECM)
3INSPECT ECM
G035655E14
Tester Connection Specified Condition
KNK1 (E10-29) - EKNK (E10-28) 4.5 to 5.5 V
KNK2 (E10-21) - EKN2 (E10-20) 4.5 to 5.5 V
REPLACE ECM (See page ES-498)