Talon FWD L4-1997cc 2.0L DOHC (1990)
Idle Speed/Throttle Actuator - Electronic: Description and Operation
ISC Stepper Motor
The primary function of the Idle Speed Control (ISC) Servo is to carry out the commands of the Control Unit for regulating the idle speed.
By monitoring several returning sensor signals, the Control Unit is able to determine the operating condition of the engine. Adjustments to the idle speed
via the control servo are made in order to compensate for the air-conditioning compressor load, the load when the automatic transmission is shifted from
PARK or NEUTRAL to DRIVE, and as an idle-up device for cold starting the engine.
The Stepper motor responds to signals from the Control Unit to extend or retract the pintle. When the pintle is extended the air by-pass gap is decreased,
and increased when retracted.
