Section 04 FUEL SYSTEM
Subsection 01 (INTELLIGENT THROTTLE CONTROL (iTC))
INTELLIGENT THROTTLE CONTROL
(iTC)
SERVICE TOOLS
Description
Part Number
Page
DIAGNOSTIC HARNESS ...............................................................
529 036 179 ......................................... 215
FLUKE 115 MULTIMETER ............................................................
529 035 868 ................................. 215, 217
SERVICE PRODUCTS
Description
Part Number
Page
DIELECTRIC GREASE ...................................................................
293 550 004 ......................................... 218
GENERAL
SYSTEM DESCRIPTION
The iTC is an electronic throttle control system
that includes a cableless throttle control located
on the RH side of handlebar, an electric throttle ac-
tuator (ETA) located on the throttle body and the
engine control module (ECM). The iTC is often re-
ferred to as a "throttle by wire" system.
sdd2009-001-031_a
1. Throttle lever
2. Throttle accelerator sensor (TAS)
sdd2009-001-030_b
1. Throttle body
2. Throttle actuator
The throttle lever operates the throttle accelera-
tor sensor (TAS). It is a double output hall effect
sensor. The redundancy is used for security pur-
poses.
The throttle actuator (ETA) is a DC motor on the
throttle body that regulates the throttle plate via a
drive gear. Pulse width modulation (PWM) is used
to control the motor. In the throttle body, there is
a double throttle position sensor (TPS). The redun-
dancy is used for security purposes. The TPS is
a potentiometer that supplies the ECM the actual
angle position of the throttle plate.
According to the torque demand from the TAS,
the ECM powers the ETA motor which is rotated
to open or close the throttle plate. When the ECM
acknowledges that the throttle plate reached the
targeted opening through the TPS, the ECM stops
the throttle actuator to this position.
The iTC allows the throttle actuator to be moved ir-
respective of the accelerator sensor position since
it is not directly linked by a throttle cable.
smr2009-050
213
Содержание GTX Limited iS 255 2009
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