Chrysler Conquest 1988 Service Manual page 804

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FUEL (ECI) SYSTEM
- General Information
EC1451
5FUOO19
IDLE SPEED CONTROL (IX) SERVO
NIQBCGA
The ISC servo consists of a motor, worm gear, worm wheel
and plunger.
Also are incorporated the motor position sensor [MPS) to
detect plunger position and the idle switch to detect idle _
position.
The worm gear;installed on-the motor shaft, transmits motor_:
rotation to the worm wheel.
The worm wheel is meshed with worm on the plunger so that
the plunger extends or retracts as the worm wheel rotates. 1
As the motor rotates according to-the signal from the ECU, the mm
plunger extends or retracts depending on the direction of
rotation of the motor to actuate the throttle valve via the ISC _
lever.
In this way, the idle speed is controlled by adequately changing
the throttle valve opening.
IGNITER
N14BCHA
The igniter, cons@ting of the knocking level evaluating sectjon-,
and the ignitions timing and boost pressure control section, ~
evaluates the knocking level and controls the ignition timing
and the boost pressure- When the knock sensor malfunction, it
retards the ignition timing by a fixed angle (except when idling)
to protect the engine. (Fail-safe design)
WASTE GATE SOLENOID VALVE, CONTROL RELAY AND
AIR CONDITIONER POWER RELAY
N14BCID
Reter to EC[ SYSTEM OPERATION, P.14-12. ~~
SECONDARY AIR CONTROL SOLENOID VALVE AND EGR
CONTROL SOLENOID VALVE
N14BCJB
Refer to GROUP 25 EMISSION CONTROL SYSTEMS.
ELECTRONIC CONTROL UNIT (ECU)
N14BDAC
Based on the information from various sensors, the ECU
determines (computes) an optimum control for varyrng operat-
rng conditions and accordingly drives the output actuators.
The ECU consists of an &biLmicroprocessor, random access 4
memory (RAM), read only memory (ROM) and input/output
(I/O) interface. :
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