Component Descriptions - Mazda 323 1988 Workshop Manual

4B
OUTLINE
COMPONENT DESCRIPTIONS
1
2
3
4
5
6
7
a
s
lo
11
12
13
14
15
16
17
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COMPONENT
4ir cleaner
Sir flow meter
Vmospheric pres-
sure sensor
Vr valve
3rake light switch
Xalytic converter
Charcoal canister
:heck connector
Zircuit opening rela
X&h switch
tngine control unit
lashpot
%el filter
:uel pump
njector
ntake Air Therm0
3ensor
ntercoder
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FUNCTION
REMARKS
Filters air into the combustion chamber
Detects intake air amount: sends sianal
to the engine control unit.. (for determina-
tion of fuel injection amount)
Detects atmospheric pressure to prevent
over rich mixture; sends signal to engine
:ontrol unit.
Intake air thermo sensor and fuel pump
switch are integrated.
tihen engine is cold, supplies bypass air
nto dynamic chamber for quick warm-up
and smooth idle.
Detects brake ooeration (deceleration):
sends signal to control unit.
.~
Reduce HC and CO by oxidation. Re-
duce NOx.
Stores fuel tank fumes while engine is
stopped for evaporative emission.
Ear Self-diaQn&S checker
3upplies voltage for fuel pump while en-
gine running.
Detects in-gear condition; sends signal to
:ontrol unit.
Detects the following:
1. Engine speed
2. Intake air amount
3. Engine coolant temperature
4. Engine load condition
5. OXyQen concentration
6. In-gear condition
7. Intake air temperature
8. Atmospheric pressure
9. AK operation
10. P/S operation
11. E/L operation
12. Starting signal
13. Initial set signal
Controls operation of the following;
1. Fuel injection amount
2. Idle speed control system
3. Pressure regulator control system
4. Fail-safe system
5. Monitor switch function
Gradually allows throttle valve closing
during deceleration.
Filters particles from fuel
Provides fuel to injectors
Injects fuel to intake port
Detects intake air temperature: compen-
sates fuel injection amount through en-
gine control unit.
Dools intake air temperature after tur-
bocharger
l
Thermo wax type
l
Installed into BAC valve
3 oin connector (Green)
3witch closed when clutch pedal is
.eleased.
1. Ignition coil (-) terminal
2. Air flow meter
3. Water thermo sensor
4. Throttle sensor (Point type)
5. Oxygen Sensor
6. Clutch switch and neutral switch
7. intake air thermo sensor
(in air flow meter)
8. Atmospheric pressure sensor
9. A/C switch
IO. P/S switch
Il. E/L switch
12. Starter switch (Ignition switch)
13. Test terminal
1. Injector
2. BAC valve
3. Solenoid valve (for pressure regulator)
4. Self-diagnosis checker and MIL
5. Monitor lamp (Self-diagnosis checker)
qdjustment speed
vfTx....2.000*150 rpm
1 Operates while engine is running
1 Installed in fuel tank
:ontrolled by signals from engine control
nit.
jir cooled
48-4 323 Revised 10107