Subaru 2002 Impreza Service Manual page 21

a
AIR LINE
Fuel Injection (Fuel System)
E: THROTTLE POSITION SENSOR
0
The throttle position sensor is mounted in the throttle body and linked to the throttle valve.
0
The throttle position sensor sends the ECM voltage signal corresponding to the opening of the
throttle valve. When the sensor's output voltage exceeds a predetermined level, the ECM inter-
prets it as complete closure of the throttle valve. When the output voltage is at another predeter-
mined level, the ECM recognizes that the throttle valve is at a wide open position. Since the output
characteristics of the sensor change over years, the ECM is provided with a learning function to
be able to interpret signals into throttle valve angles always correctly.
I
B2H2004B
(1) Lever
(2) Terminal
FU-5