2007 TOYOTA SIENNA check engine

ES–3022GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
INSPECTION PROCEDURE
HINT:
• The following conditions may also cause DTC P0505 to be set:
(a) The floor carpet overlapping slightly onto the accelerator pedal, causing the accelerator pedal to be
slightly depressed and therefore the throttle valve position to be slightly open.
(b) The accelerator pedal being not fully released.
• Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame
data can be helpful in determining whether the vehicle was running or stopped, whether the engine
was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the
time of a malfunction.
(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 P0505 are output, troubleshoot
those DTCs first.
B
A
OK:
PCV hose is connected correctly and is not damaged.
NG
OK
(a) Check the intake system for vacuum leakage.
(a) Engine RPM - target engine RPM Below -100 rpm, or 150 rpm or more
(b) Vehicle condition Stop after vehicle was driven by 6.25 mph (10.06 km/h) or more
2. Frequency that both of the following conditions (a)
and (b) are metOnce
(a) Engine RPM - target engine RPM Below -100 rpm, or 150 rpm or more
(b) IAC flow rate learning valve 1.3 L/sec. or less, or 8.5 L/sec. or more
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0505)
Display (DTC Output) Proceed to
P0505 A
P0505 and other DTCs B
GO TO DTC CHART (See page ES-56)
2CHECK PCV HOSE CONNECTIONS
REPAIR OR REPLACE PCV HOSE
3CHECK INTAKE SYSTEM

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–303
ES
OK:
No leakage from intake system.
NG
OK
(a) Check the throttle valve condition.
OK:
No foreign objects between the throttle valve and
housing.
NG
OKREPAIR OR REPLACE INTAKE SYSTEM
4CHECK THROTTLE VALVE
REPLACE THROTTLE BODY (See page ES-
493)
REPLACE ECM (See page ES-498)

ES–3062GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data
can be helpful in determining whether the vehicle was running or stopped, whether the engine was
warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of
a malfunction.
(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 the menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read the DTCs.
Result
HINT:
If any DTCs other than P050A are output, troubleshoot
those DTCs first.
B
A
HINT:
Calculate the total fuel trim values to check the characteristic
deviation of the mass air flow meter.
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / SHORT
FT #1 and LONG FT #1.
(e) Read the values displayed on the tester at engine idles.
(f) Add together the SHORT FT #1 and LONG FT #1 values
to obtain the total FUEL TRIM.
OK:
Total of SHORT FT #1 and LONG FT #1 values is
between -20 % and 20 %.
OK
Accumulated mass air flow Varies with ECT (Example: Less than 20 g)
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050A)
Display (DTC Output) Proceed to
P050A A
P050A and other DTCs B
GO TO DTC CHART (See page ES-56)
2READ VALUE USING INTELLIGENT TESTER (FUEL TRIM)
Go to step 12

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–307
ES
NG
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.
(e) Check the engine speed while operating the Oil Control
Valve (OCV) using the tester.
OK
NG
OK
OK:
PCV hose is connected correctly and is not damaged.
NG
OK
(a) Check the intake system for vacuum leakage.
OK:
No leakage from intake system.
NG
OK
(a) Visually check that the air cleaner filter element is not
excessively contaminated with dirt or oil.
OK:
Air cleaner filter element is not excessively
contaminated with dirt or oil.
NG
OK
3PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV)
Tester Operation Specified Condition
OCV OFF Normal engine speed
OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON)
Go to step 8
4CHECK PCV HOSE CONNECTIONS
Go to step 9
5CHECK INTAKE SYSTEM
Go to step 10
6CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
Go to step 11

ES–3082GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
NEXT
NEXT
NEXT
NEXT
NEXT
(a) Check for deposits around the throttle valve and throttle
valve condition.
OK:
No deposits around throttle valve and throttle valve
moves smoothly.
NG
OK
NEXT
NEXT
7REPLACE MASS AIR FLOW METER
Go to step 15
8CHECK AND REPAIR VVT SYSTEM
Go to step 15
9REPAIR OR REPLACE PCV HOSE
Go to step 15
10REPAIR OR REPLACE INTAKE SYSTEM
Go to step 15
11REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
Go to step 15
12CHECK THROTTLE VALVE
Go to step 14
13REPLACE ECM
Go to step 15
14REPAIR OR REPLACE THROTTLE BODY ASSEMBLY
Go to step 15

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–309
ES
NOTICE:
In this operation, the engine must be cold (the same level
as the engine coolant temperature recorded in the freeze
frame data).
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn the tester on.
(d) Clear the DTCs (See page ES-39).
(e) Switch the ECM from normal mode to check mode using
the tester (See page ES-43).
(f) Start the engine to idle for a minute.
OK:
Stable fast idling.
(g) Read the DTCs.
OK:
No DTC output.
NEXT
15CHECK WHETHER DTC OUTPUT RECURS (DTC P050A)
END

ES–3122GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
TYPICAL MALFUNCTION THRESHOLDS
INSPECTION PROCEDURE
HINT:
• DTC P050B may be set when the engine shows the symptom as listed below. If necessary, check the
trouble area as listed below.
• Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition
information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame
data can be helpful in determining whether the vehicle was running or stopped, whether the engine
was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the
time of a malfunction.
(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 the menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read the DTCs.
Result
HINT:
If any DTCs other than P050B are output, troubleshoot
those DTCs first.
B
A
HINT:
Calculate the total fuel trim values to check the characteristic
deviation of the mass air flow meter.
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine.
(c) Turn the tester on.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / PRIMARY / SHORT
FT #1 and LONG FT #1.
Accumulated time when ignition timing retard value is insufficient 5 seconds or more
Symptoms Factor Trouble Area
Low idle speed at engine cold.Excessive engine friction• Engine oil deterioration
• Drive belt tension
• A/C compressor
• Generator
• P/S pump
Rough idle at engine cold. Abnormal combustion Fuel quality
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P050B)
Display (DTC Output) Proceed to
P050B A
P050B and other DTCs B
GO TO DTC CHART
2READ VALUE USING INTELLIGENT TESTER (FUEL TRIM)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–313
ES
(e) Read the values displayed on the tester at engine idles.
(f) Add together the SHORT FT #1 and LONG FT #1 values
to obtain the total FUEL TRIM.
OK:
Total of SHORT FT #1 and LONG FT #1 values is
between -20 % and 20 %.
OK
NG
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine.
(d) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1.
(e) Check the engine speed while operating the Oil Control
Valve (OCV) using the tester.
OK
NG
OK
OK:
PCV hose is connected correctly and is not damaged.
NG
OK
(a) Check the intake system for vacuum leakage.
OK:
No leakage from intake system.
NG
OK
(a) Visually check that the air cleaner filter element is not
excessively contaminated with dirt or oil. Go to step 12
3PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV)
Tester Operation Specified Condition
OCV OFF Normal engine speed
OCV ON Engine idles roughly or stalls (soon after OCV switched from OFF to ON)
Go to step 8
4CHECK PCV HOSE CONNECTIONS
Go to step 9
5CHECK INTAKE SYSTEM
Go to step 10
6CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY