MULTI-PORT FUEL INJECTION DESCRIPTIONS AND SYSTEM OPERATION SERVICE MANUAL NUMBER 23
Page 5B-20 90-861326--1 MARCH 1999
ECM Input and Sensor Descriptions
The following lists the sensors, switches, and other inputs used by the ECM to control its
various systems. Although we will not cover them all in great detail, there will be a brief
description of each.
a
b
c
d
e
f
g
h
i
j
k
l
mno
p
q
r
s
a-System Relay
b-Distributor For REF rpm
c-Discrete Switches (Audio Warning)
d-Knock Module
e-Knock Sensor
f-TP
g-MAP
h-ECT
i-IAT
j-Serial Data
k-Audio Warning Buzzer
l-Fuel Injectors
m-IAC Motor
n-Ignition Control Module
o-Fuel Pump Relay
p-Fuel Pump
q-Inputs
r-Outputs
s-ECM
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