DESCRIPTION SERVICE MANUAL NUMBER 22
Page 5A-18 90-860074--1 FEBRUARY 2002
ECM Input and Sensor Descriptions
The following shows the sensors, switches, and other inputs used by the ECM to output
control the various systems. Although we will not cover them all in great detail, there will be
a brief description of each.
Sensors ECM
Actuat
ors
Number 1 Cylinder
Fuel Injector
Injected fuel
Fuel Injector
(Needle-motion
sensor)
Injected fuel
quantity
Electronic
ally
controlled
fuel
fuel
injection
Temperature sensors
(water, air, fuel)
Engine
shut off
pump
(Fuel
Quantity
and
Micro-
and
Timing)
Sensor for control-
collar position
processors
Start of
injection
Engine rpm Speed
sensor
Starting
control
Glow
control
unit
MAP sensor
Setpoint
generators
Diagno
sis
Maps
TP sensor
Diagnostic
display
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