Toyota Celica 2005 Repair Manual page 785

DI−586
DTC P2111
DTC P2112
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) is not used on the throttle cable.
DTC No.
P2111 Throttle motor locked during ECM order to open
P2112 Throttle motor locked during ECM order to close
MONITOR DESCRIPTION
The ECM concludes that there is a malfunction of the ETCS 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 will be set.
FAIL SAFE
If the Electronic Throttle Control System (ETCS) 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 injection (inter-
mittent fuel−cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a "pass" 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.
2005 CELICA (RM1131U)
DIAGNOSTICS
Throttle Actuator Control System
−Stuck Open
Throttle Actuator Control System
−Stuck Closed
DTC Detection Condition
− ENGINE (2ZZ−GE)
S Throttle control motor circuit
S Throttle control motor
S Throttle body
S Throttle valve
S Same as DTC No. P2111
784
Trouble Area
DIC7R−02