Throttle Body; Throttle Position (Tp) Sensor - Kohler KG2204 Service

1.14. Throttle Body

Figure 1-17 Throttle Body
The throttle body controls the amount of fuel that enters
the engine and is composed of a throttle blade, electric
throttle motor, and a throttle position (TP) sensor.
Engine speed control is maintained by the ECM.
Defaults programmed into the ECM software and
throttle position sensors allow the ECM to maintain
safe operating control over the engine while
maintaining speed and load control.
The electronic throttle control (ETC) device utilizes an
electric motor connected to the throttle blade. The ECM
sends an electrical signal to the motor on the electronic
throttle control to increase or decrease the angle of the
throttle blade thus increasing or decreasing the fuel
supply to the engine.
The electronic throttle control device incorporates an
internal Throttle Position (TP) sensor which provides
output signals to the ECM as to the location of the
throttle shaft and blade. The TP sensor information is
used by the ECM to correct for speed and load control.
TP-6903 5/16a

1.15. Throttle Position (TP) Sensor

1
1. Throttle position sensor
Figure 1-18 Throttle Position Sensor
The throttle position (TP) sensor is part of the throttle
body and is composed of three components: an
electronic throttle control (ETC), throttle position
sensor 1 (TP1), and throttle position sensor 2 (TP2).
TP1 and TP2 determine the throttle blade position and
send signals to ECM. The ECM receives information
from TP1 and TP2 and sends a signal to the ETC to
open or close the throttle blade. The ETC controls an
electric motor that opens and closes the throttle blade.
Fuel System Overview 19