2007 TOYOTA SIENNA Service Repair Manual

Page 633 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–3402GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
(a) Disconnect the T2 throttle body connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance according to the value(s) in the

Page 634 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–341
ES
DESCRIPTION
The throttle actuator is operated by the ECM, and opens and closes the throttle valve using the gears.
The opening angle of the th

2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–341
ES
DESCRIPTION
The throttle actuator is operated by the ECM, and opens and closes the throttle valve using the gears.
The opening angle of the throttle valve is detected by the Throttle Position (TP) sensor, which is mounted
on the throttle body. The TP sensor provides feedback to the ECM so that it can control the throttle
actuator and the throttle valve appropriately in response to driver inputs.
HINT:
This ETCS (Electronic Throttle Control System) does not use a throttle cable.
MONITOR DESCRIPTION
The ECM determines that there is a malfunction in the ETCS when the throttle valve remains at the fixed
angle despite a high drive current from the ECM. The ECM illuminates the MIL and sets a DTC.
If the malfunction is not repaired successfully, a DTC is set when the accelerator pedal is fully depressed
and released quickly (to fully open and close the throttle valve) after the engine is next started.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
All:
P2111 (Throttle actuator stuck open):
P2112 (Throttle actuator stuck closed):
DTC P2111 Throttle Actuator Control System - Stuck Open
DTC P2112Throttle Actuator Control System - Stuck
Closed
DTC No. DTC Detection Condition Trouble Area
P2111ECM signals throttle actuator to close, but stuck (1 trip
detection logic)• Throttle actuator
• Throttle body
• Throttle valve
P2112ECM signals throttle actuator to open, but stuck (1 trip
detection logic)• Throttle actuator
• Throttle body
• Throttle valve
Related DTCsP2111: Throttle actuator stuck open
P2112: Throttle actuator stuck closed
Required Sensors / Components (Main) Throttle actuator
Required Sensors / Components (Related) -
Frequency of Operation Continuous
Duration 0.5 seconds
MIL Operation Immediate
Sequence of Operation None
The monitor will run whenever these DTCs are not
presentNone
All of the following conditions are met -
System guard* ON
Throttle actuator current 2 A or more
Throttle actuator close duty ratio 80% or more
All of the following conditions are met -
System guard* ON
Throttle actuator current 2 A or more

Page 635 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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

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

Page 636 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–343
ES
HINT:
If any DTCs other than P2111 or P2112 are output,
troubleshoot those DTCs first.
B
A
(a) Check for contamination between the throttle va

Page 637 of 3000

TOYOTA SIENNA 2007 Service Repair Manual ES–3442GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
DESCRIPTION
The ETCS (Electronic Throttle Control System) has a dedicated power supply circuit. The voltage (+BM)
is monitored and when it is

Page 638 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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

Page 639 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 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 f

Page 640 of 3000

TOYOTA SIENNA 2007 Service Repair Manual 2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEMES–347
ES
(a) Check the harness and connector between the ETCS
fuse and ECM.
(1) Remove the ETCS fuse from the engine room
junction block.
(2) Disconne

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