Chrysler Conquest 1988 Service Manual page 801

FUEL (ECI) SYSTEM
- General Information
14-7
2,
Stoiqhio metric ratio
Air-fuel ratio
ECIOO;
Stoichiometric ratio
01251:
I
EC1664
I
1
Rotor
0125081
OXYGEN SENSOR
N14BBIB
The oxygen sensor installed in the exhaust pipe makes use of
the principles of solid electrolyte oxygen concentration cell. It is
characterized by sharp change of the output voltage in the
vicinity of the stoichiometric air-fuel ratio.
Using such characteristics, the oxygen sensor senses the
oxygen concentration in the exhaust gas and feeds it back to
the ECU. The ECU then judges if the air-fuel ratio is richer or
leaner as compared to the stoichiometric ratio and provides
feedback control to adjust the air-fuel ratio to the stoichiometric
ratio where the emission purification rate of the three-catalyst
converter is the optimum.
VEHICLE SPEED SENSOR
N14BEJA
The vehicle speed sensor uses a reed switch.' The speed
sensor built in the speedometer converts the transmission
speedometer gear revolution (vehicle speed) into pulse signals,
which are sent to the ECU.
INHIBITOR SWITCH - Vehicles with an Automatic Trans-
mission
N14BBMB
This switch detects whether the select lever is currently
positioned at N or P. Based on this signal, the ECU senses the
automatic transmission load and drives the ISC servo to keep
optimum idle speed.