Chrysler Conquest 1988 Service Manual page 813

FUEL (ECI) SYSTEM
- General Information
14-19
The boost meter is basically an ammeter. Based on the intake
air volume signal from the air flow sensor (AFS) and the engine
speed signal from the engine speed sensor, the ECU computes
the load and determines the duty ratio accordingly and drives
the boost meter.
Load cx: intake air volume/rpm
T.
Duty ratio
l-l-l
75 msec. 75
msec.
162100:
NOTE
The duty ratio is the ON duration ratio of 13.3 Hz pulse or TZ/TI.
The higher the duty ratio, the more mean current flows to the
boost meter, and as a result, the boost meter reads the higher
value.
The smaller is the duty ratio, the boost meter reads the smaller
I
value.
2
POWER SUPPLY AND FUEL PUIVIP CONTROL
N14BOAA
To injector
through resistor
Control relay
To AFS, igniter
EC1544
l
While cranking (ignition switch at ST), current flows through
coil L, to close switch S,. As a result, the fuel pump is
driven.
Current also flows through coil L3 to close switch S2. As a
result, power is supplied to the ECU, AFS, igniter and
injectors.
l
While the engine is running, the ECU turns on the power
transistor to supply current to coil L, and to close switch S.
As a result, the fuel pump is driven.