2007 TOYOTA SIENNA Fuel System

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–323
ES
OK
(a) Connect the intelligent tester to the DLC3.
(b) Start the engine and turn the tester on.
(c) Warm up the engine at an engine speed of 2500rpm for
approximately 90 seconds.
(d) Enter the following menus: DIAGNOSIS / ENHANCED II
/ ACTIVE TEST / A/F CONTROL.
(e) Perform the A/F CONTROL operation with the engine in
an idling condition (press the RIGHT or LEFT button to
change the fuel injection volume).
(f) Monitor the voltage outputs of the HO2 sensors (O2S
B1S2) displayed on the tester.
HINT:
• The A/F CONTROL operation lowers the fuel injection
volume by 12.5% or increases the injection volume by
25%.
• Each sensor reacts in accordance with increases in
the fuel injection volume.
Standard voltage
Result
B
C
A
2CHECK HEATED OXYGEN SENSOR
A142077E01
Tester Display (Sensor) Injection Volume Voltage
O2S B1S2-12.5% Less than 0.2 V
+25% More than 0.8 V
Result Proceed to
OK A
NG (for 2WD model) B
NG (for 4WD model) C
REPLACE HEATED OXYGEN SENSOR (See
page EC-32)
REPLACE HEATED OXYGEN SENSOR (See
page EC-38)

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–329
ES
• 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 and turn the
tester on.
(c) Select the following menu items: DIAGNOSIS /
ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
(d) Check the value displayed on the tester when the
ignition switch is turned to the ON position and START
position.
OK
OK
NG
(a) Inspect the Park/Neutral Position (PNP) switch.
(1) Disconnect the P1 PNP switch connector.
(2) Measure the resistance according to the value(s) in
the table below.
Standard resistance
(3) Reconnect the PNP switch connector.
NG
OK
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position and turn the
tester on.
1READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)
Ignition Switch Positions STARTER SIG
ON OFF
START ON
CHECK FOR INTERMITTENT PROBLEMS
2INSPECT PARK/NEUTRAL POSITION SWITCH
A093221E20
Shift Position Tester Connection Specified Condition
P 2 - 6, 4 - 5 Below 1
R 1 - 2 Below 1
N 2 - 9, 4 - 5 Below 1
D 2 - 7 Below 1
2 2 - 3 Below 1
L 2 - 8 Below 1
REPLACE PARK/NEUTRAL POSITION
SWITCH (See page AX-125)
3READ VALUE OF INTELLIGENT TESTER (STARTER SIGNAL)

ES–3362GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
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DESCRIPTION
The park/neutral position switch detects the shift lever position and sends signals to the ECM.
HINT:
After confirming DTC P0705, use the intelligent tester to confirm the PNP switch signal in the ALL menu
(to reach the ALL menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL).
WIRING DIAGRAM
Refer to DTC P0705 for 2WD model (See page AX-40) or 4WD model (See page AX-40).
INSPECTION PROCEDURE
Refer to DTC P0705 for 2WD model (See page AX-41) or 4WD model (See page AX-41).
HINT:
Read freeze frame data using the intelligent tester or OBD II scan tool. The ECM records vehicle and
driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting,
freeze frame data can help determine if the vehicle was running or stopped, 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.
DTC P0705Transmission Range Sensor Circuit Malfunc-
tion (PRNDL Input)
DTC No. DTC Detection Condition Trouble Area
P0705(A) Any 2 or more signals of the following are ON
simultaneously (2-trip detection logic)
• P input signal is ON.
• N input signal is ON.
• R input signal is ON.
• D input signal is ON.
(B) Any 2 ore more signals of the following are ON
simultaneously (2-trip detection logic)
• NSW input signal is ON.
• R input signal is ON.
• D input signal is ON.
(C) Any of following conditions is met for 2.0 sec. or more in
the S position (2-trip detection logic).
• NSW input signal is ON.
• P input signal is ON.
• N input signal is ON.
• R input signal is ON.
(D) All switches are OFF simultaneously for NSW, P, R, N and
D.• Open or short in park/neutral position switch circuit
• Park/neutral position switch
•ECM

ES–3382GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
P2102:
P2103:
TYPICAL MALFUNCTION THRESHOLDS
P2102:
P2103:
FA I L - S A F E
When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to
the throttle actuator off, and the throttle valve is returned to a 6
throttle angle by the return spring. The
ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition
timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a
minimal speed.
If the accelerator pedal is depressed gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
Throttle motor ON
Duty-cycle ratio to open throttle actuator 80% or more
Throttle actuator power supply 8 V or more
Motor current change during latest 0.016 sec Less than 0.2 A
Throttle motor ON
Either of the following conditions is met: Condition 1 or 2
1. Throttle actuator power supply 8 V or more
2. Throttle actuator power ON
Battery voltage 8 V or more
Starter OFF
Throttle actuator current Less than 0.5 A
Either of the following conditions is met Condition 1 or 2
1. Hybrid IC diagnosis signal Fail
2. Hybrid IC current limiter port Fail

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–339
ES
WIRING DIAGRAM
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.
• The throttle actuator current (THROTTLE MOT) and the throttle actuator duty ratio (THROTTLE OPN /
THROTTLE CLS) can be read using the intelligent tester. However, the ECM shuts off the throttle
actuator current when the ETCS malfunctions.
(a) Disconnect the T2 throttle body connector.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance
(c) Reconnect the throttle body connector.
NG
OK
1INSPECT THROTTLE BODY (RESISTANCE OF THROTTLE CONTROL MOTOR)
G041063E08
A059778E56
Tester Connection Condition Specified Condition
M+ (T2-2) - M- (T2-1) 20
C (68F) 0.3 to 100
REPLACE THROTTLE BODY (See page ES-
493)

ES–3422GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
*: System guard set when following conditions met
TYPICAL MALFUNCTION THRESHOLDS
P2111 (Throttle actuator stuck open):
P2112 (Throttle actuator stuck closed):
FA I L - S A F E
When either of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to
the throttle actuator off, and the throttle valve is returned to a 6
throttle angle by the return spring. The
ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition
timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a
minimal speed.
If the accelerator pedal is depressed slowly, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
Refer to DTC P2102 (See page ES-331).
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 menu items: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT CODES.
(e) Read the DTCs.
Result
Throttle actuator open duty-cycle 80% or more
Throttle actuator ON
Throttle actuator duty calculation Executing
Throttle position sensor Fail determined
Throttle actuator current-cut operation Not executing
Throttle actuator power supply 4 V or more
Throttle actuator Fail determined
TP sensor voltage change No change
TP sensor voltage change No change
1CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2111 OR P2112)
Display (DTC Output) Proceed to
P2111 or P2112 A
P2111 or P2112 and other DTCs B

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–345
ES
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
FAIL-SAFE
When this DTC, as well as other DTCs relating to ETCS (Electronic Throttle Control System)
malfunctions, is set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to
the throttle actuator off, and the throttle valve is returned to a 6
throttle angle by the return spring. The
ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition
timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a
minimal speed. If the accelerator pedal is depressed gently, the vehicle can be driven slowly.
Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.
WIRING DIAGRAM
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
Battery voltage 8 V or more
Throttle actuator power ON
Throttle actuator power supply voltage (+BM) Less than 4 V
Throttle actuator power supply voltage 9 to 14 V
A136173E07

ES–3462GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
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) Remove the ETCS fuse from the engine room junction
block.
(b) Measure the resistance according to the value(s) in the
table below.
Standard resistance:
Below 1
(c) Reinstall the ETCS fuse.
NG
OK
(a) Measure the voltage according to the value(s) in the
table below.
Standard voltage
OK
NG
1CHECK FUSE (ETCS FUSE)
A080011E10
REPLACE FUSE (ETCS FUSE)
2INSPECT ECM (+BM VOLTAGE)
A162489E14
Tester Connection Specified Condition
+BM (E4-7) - E1 (E11-1) 9 to 14 V
CHECK FOR INTERMITTENT PROBLEMS