–
DIAGNOSTICS
ENGINE (5VZ–FE)
DI–405
667
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
DTC
P2111
Throttle Actuator Control System
–Stuck Open
DTC
P2112
Throttle Actuator Control System
–Stuck Closed
CIRCUIT DESCRIPTION
Throttle motor is operated by the ECM and it opens and closes the throttle valve by a gear. The opening angle
of the throttle valve is detected by the throttle position sensor which is mounted on the throttle body and it
provides feedback to the ECM to control the throttle motor in order the throttle valve opening angle properly
in response to driving condition. If this DTC is stored, the ECM shuts down the power for the throttle motor
and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening
angle of the throttle valve can be controlled by the accelerator pedal through the throttle cable.
DTC No.
DTC Detecting Condition
Trouble Area
P2111
P2112
Lock throttle control motor during control throttle control motor
Throttle control motor circuit
Throttle control motor
Throttle body
Throttle valve
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand–held tester or the OBD II scan tool, as freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean
or rich, etc. at the time of the malfunction.
1
Visually check throttle valve.
PREPARATION:
Remove the intake air connector.
CHECK:
Check whether or not a foreign body is caught between the throttle valve and the housing.
NG
Remove a foreign body and clean throttle body.
OK
DIA9V–02
DI–406
–
DIAGNOSTICS
ENGINE (5VZ–FE)
668
Author:
Date:
2003 TOYOTA TACOMA (RM1002U)
2
Check throttle control motor (See page SF–28).
NG
Replace throttle control motor
(See page SF–30).
OK
3
Check for open and short in harness and connector between throttle control mo-
tor and ECM (See page IN–28).
NG
Repair or replace. harness or connecto