Toyota Celica 2005 Repair Manual page 797

DI−598
CIRCUIT DESCRIPTION
HINT:
This electrical throttle system does not use a throttle cable.
S
This accelerator pedal position sensor is a non−contact type.
S
The accelerator pedal position sensor is mounted on the accelerator pedal to detect the angle of the acceler-
ator pedal. This sensor is electronically controlled and uses Hall−effect elements.
In the accelerator pedal position sensor, the voltage applied to terminals VPA and VPA2 of the ECM changes
between 0 V and 5 V in proportion to the angle of the accelerator pedal. The VPA is a signal to indicate the
actual accelerator pedal angle and is used for the engine control. VPA2 is used to detect malfunctions of
the sensor itself.
The ECM judges the current angle of the accelerator pedal from these signals input from terminals VPA and
VPA2, and the ECM controls the throttle motor based on these signals.
Accelerator Pedal
Position Sensor
Magnet
IC No. 1
IC No. 2
Magnet
A19694
2005 CELICA (RM1131U)
DIAGNOSTICS
ECM
VPA1
EPA1
VCP1
VPA2
EPA2
VCP2
− ENGINE (2ZZ−GE)
1
*
5
3.7 to 4.4
2.9 to 3.6
1.6
1.4
Usable Range
0
Accelerator Pedal Turning Angle (deg)
1
: Accelerator Pedal Fully Released
*
2
* : Accelerator Pedal Fully Depressed
796
2
*
25
A19803