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COMPONENT DESCRIPTIONS
Component
Air flow meter
Detects amount of intake air;
sends signal to control unit
Clutch switch
Detects in-gear condition;
sends signal to control unit
Distributor
Has Ne and G rotor
EGR position sensor
Detects EGR control valve lift amount;
sends signal to control unit
Engine control unit
Detects signals from input sensors and
switches; decides the best ignition timing
G rotor and pick-up
Detects No.1 and No.4 cylinders TDC;
sends signal to control unit
Idle switch
Detects when throttle valve fully closed;
sends signal to control unit
Receives spark signal from control unit
Igniter
and generates high voltage to ignition
coil
Sends engine cranking signal to control
Ignition switch
unit
(ST position)
Main relay
Supplies electric current to injectors and
control unit
Ne rotor and pick-up
Detects crank angle at 30° intervals;
sends signal to control unit
Detects in-gear condition; sends signal to
Neutral switch
control unit
Receives knock signal from knock sen
Knock control unit
sor; sends signal to control unit
Detects engine knocking; sends signal to
Knock sensor
knock control unit
Detects N or P range; sends signal to
EC-AT control unit
control unit
Detects in-gear condition; sends signal to
Inhibitor switch
EC-AT control unit
Detects throttle valve opening angle;
Throttle sensor
sends signal to control unit
Detects coolant temperature;
Water thermo sensor
sends signal to control unit
Detects radiator coolant temperature;
Water thermo switch
sends signal to control unit
ESA CONTRODSYSTEM
Function
Intake air temp sensor and
fuel pump switch are in
tegrated
Switch ON when clutch pedal
depressed
Variable resister
For determining fuel injection
timing and ignition timing
Installed on throttle body
Engine speed signal
Switch ON when in-gear
Switch ON in " N" or "P"
Remarks
range
Installed on throttle body
ON: above 17°C (63°F)
4B
Application
New
Previous
model
model
O
O
O
o
o
X
o
o
o
X
o
X
o
0
o
X
o
o
o
o
o
X
o
o
o
O
"
o
0
o
X
o
0
o
o
o
o
o
o
86U04B-099
4B—87
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Table of Contents
Troubleshooting
