2001 TOYOTA SEQUOIA Service Repair Manual

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Page 553 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17444
Wire Harness Side:
Air Injection Driver Connector
A41
+BE
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
DI
± DIAGNOSTICSENGINE
DI±351
545 Author: Date:
2005 SEQUOIA (RM1146

Page 554 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual B17444
Wire Harness Side:
Air Injection Driver Connector
A41
DI+B
B17417
E4
AIDI
B17444
Wire Harness Side:
Air Injection Driver Connector
A41
E
DI±352
± DIAGNOSTICSENGINE
546 Author: Date:
2005 SE

Page 555 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±353
547 Author: Date:
2005 SEQUOIA (RM1146U)
9 Replace air injection driver.
NEXT
10 Check whether DTC output recurs.
PREPARATION:
(a) Connect a hand±held tester to the

Page 556 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±354
± DIAGNOSTICSENGINE
548 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2102 Throttle Actuator Control Motor Circuit Low
DTC P2103 Throttle Actuator Control Motor Circuit High
CIRCUIT DESCRIPTI

DI±354
± DIAGNOSTICSENGINE
548 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2102 Throttle Actuator Control Motor Circuit Low
DTC P2103 Throttle Actuator Control Motor Circuit High
CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM. It opens and closes the throttle valve.
The opening angle of the throttle valve is detected by the throttle position sensor which is mounted on the
throttle body. The throttle position sensor provides feedback to the ECM. This feedback allows the ECM to
control the throttle motor and monitor the throttle opening angle as the ECM responds to driver inputs.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2102
Conditions (a) and (b) continue for 2.0 seconds:
(1 trip detection logic)
(a) Throttle control motor output duty 80 % or more
(b) Throttle control motor current less than 0.5 A or lessOpen in throttle control motor and sensor circuit
Throttle control motor and sensor
ECM
P2103
Either of the following condition is met.
(1 trip detection logic)
(a) Throttle control motor current 10 A or more (0.1 sec)
(b) Throttle control motor current 7 A or more (0.6 sec.)Short in throttle control motor and sensor circuit
Throttle control motor and sensor
Throttle valve
Throttle body
ECM
MONITOR DESCRIPTION
The ECM monitors the current through the electronic throttle motor and detects malfunctions or open circuit
in the throttle motor based on the voltage of the current. When the current deviates from the standard, the
ECM concludes that there is a fault in the throttle motor.
Or, if the throttle valve is not functioning properly (for example, stuck ON), the ECM concludes that there is
a fault, turns on the MIL and sets a DTC is set.
Example:
When the current is more than 10 A. Or the current is less than 0.5 A when the motor driving duty ratio is
exceeding 80%. The ECM concludes that the current is out of range, turns on the MIL and a DTC is set.
FAIL SAFE
If the ETCS (Electronic Throttle Control System) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16°) by
the force of the return spring. The ECM then adjusts the engine output by controlling the fuel infection (inter-
mittent fuel±cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimum speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail±safe operation will stop
and the system will return to normal condition.
DICF9±02

Page 557 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual ± DIAGNOSTICSENGINE
DI±355
549 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
RltdDTC
P2102Throttle actuator control motor current
(Low current)
Related DTCs
P2103Throttle actuator contr

Page 558 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A21034
T14
Component Side:
M+M± Throttle Control Motor and Sensor
DI±356
± DIAGNOSTICSENGINE
550 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using th

Page 559 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual A21022
T14
M+ M±
Wire Harness Side:
Throttle Control Motor and Sensor
B17412M+
M±
E8ECM Connector
± DIAGNOSTICSENGINE
DI±357
551 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short

Page 560 of 4323

TOYOTA SEQUOIA 2001 Service Repair Manual DI±358
± DIAGNOSTICSENGINE
552 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2111 Throttle Actuator Control System
±Stuck Open
DTC P2112 Throttle Actuator Control System
±Stuck Closed
CIRCUIT DE

DI±358
± DIAGNOSTICSENGINE
552 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P2111 Throttle Actuator Control System
±Stuck Open
DTC P2112 Throttle Actuator Control System
±Stuck Closed
CIRCUIT DESCRIPTION
The throttle motor is operated by the ECM. It opens and closes the throttle valve using gears. The opening
angle of the throttle valve is detected by the throttle position sensor, which is mounted on the throttle body.
The throttle position sensor provides feedback to the ECM to control the throttle motor and set the throttle
valve angle in response to driver input.
HINT:
This Electrical Throttle Control System (ETCS) does not use a throttle cable.
DTC No.DTC Detection ConditionTrouble Area
P2111Throttle motor locked during ECM order to close.
(1 trip detection logic)Throttle control motor and sensor circuit
Throttle control motor and sensor
P2112Throttle motor locked during ECM order to open.
(1 trip detection logic)
Throttle control motor and sensor
Throttle body
Throttle valve
MONITOR DESCRIPTION
The ECM concludes that there is a malfunction of the ETCS (Electronic Throttle Control System) when the
throttle valve remains at a fixed angle despite high drive current from the ECM. The ECM will turn on the MIL
and a DTC is set.
FAIL SAFE
If the ETCS (Electronic Throttle Control System) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16°) by
the force of the return spring. The ECM then adjusts the engine output by controlling the fuel infection (inter-
mittent fuel±cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimum speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail±safe operation will stop
and the system will return to normal condition.
DICFA±02

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