1992 MAZDA PROTEGE catalytic converter

F INDEX
23UOFX-01
1. Fuel pump 4. Check valve (Two-way)
Inspection.. .............................. page F-l 25 Removal I Inspection ............... page F-128
Replacement ........................... page F-l 27 Inspection ................................ page F-140
Disassembly / Assembly.. ........ page F-l 28 5. Check-and-cut valve
2. Fuel tank Inspection ................................ page F-141
Removal I Inspection I 6. Exhaust system
Installation.. ............................ page F-l 23 Removal / Inspection /
3. Separator Installation.. ............................ page F-l 36
Removal I Inspection I 7. Catalytic converter
Installation.. ............................ page F-l 28 Removal / Inspection /
Installation .............................. page F-136
F-4

RESONANCE DUCT
SOLENOID VALVE’1
AIR CLEANER
ix
%
4.L VACUUM
CHAMBER-1
RESONANCE
CHAMBER DASHPOT
w/r) --CHECK VALVE
(TWO-WAY)
I II 14 J--CHECK-AND-
II l/%x II/ II _ \,\, _.-.,I CUT VALVE
TH
?z% ---{ IGNITER 1
~ Ne-SIGNAL 1/
G-SIGNAL’IU
DISTRIBUTOR AIR VA’LVE
/ WATER
THERMOSENSOR
SHUTTER 7
VALVE * 1 s%
SOHC
% TO ENGINE CONTROL UNIT
‘1 DOHC
‘2 BP
I CATALYTIC CONVERTER /
FU’EL PUMP
FUEL FILTER
(LOW-PRESSURE SIDE)

F OUTLINE
COMPONENT DESCRIPTIONS
Component
Air cleaner
Airflow meter
Mr valve
Atmospheric pressure
Sensor
Catalytic converter Function Remark
Filters air entering throttle body
Detects amount of intake air; sends signal to intake air thermosensor and fuel pump
ECU switch included
Supplies bypass air into dynamic chamber
l Engine speed increased to shorten
when engine is cold warm-up period
l Thermowax type l Installed in dynamic chamber
Detects atmospheric pressure; sends signal Built in ECU
to ECU
Reduces HC, CO, and NOx by chemical Monolith type
reaction Charcoal canister
Stores fuel tank fumes while engine stopped Check valve
Controls pressure in fuel tank Two-way type Circuit opening relay
Voltage for fuel pump while engine running Clutch switch (MTX)
Detects clutch condition; sends signal to Switch OFF when clutch pedal released
ECU Diagnosis connector
Concentrated service connector 25pin (located near left suspension mount-
Concentrated terminals: ing block)
1. EGI self-diagnostic terminal
2. EC-AT self-diagnostic terminal
3. Test terminal
4. Fuel pump check terminal
5. Cooling fan check terminal
6. Engine rpm output terminal Dynamic chamber
Interconnects all cylinders Engine control unit (ECU) Detects the following:
1. A/C operation 1. A/C switch
2. Air/fuel ratio (Oxygen concentration) 2. Oxygen sensor
3. ATF thermosensor
4. Atmospheric pressure 4. Atmospheric pressure sensor
5. Braking signal 5. Stoplight switch (MTX)
6. Cranking signal 6. Ignition switch (START Position)
7. DRL (Daytime Running Light) operation 7. DRL relay (Canada)
8. E/L operation 8. Blower motor switch, cooling fan relay,
headlight switch, and rear window
defroster switch
9. Engine coolant temperature 9. Water thermosensor
10. Engine speed 10. Distributor (Ne-signal)
11. Ignition ON signal 11. Ignition switch
12. In-gear condition 12. Neutral and clutch switches (MTX)
13. Inhibitor switch (ATX) 13. N range, D range, S range, L range
switch
14. Intake air amount 14. Airflow meter
15. Intake air temperature 15. Intake air thermosensor
(In airflow meter)
16. No.1 piston TDC of compression
17. P/S operation
18. Shift solenoid (ATX)
19. Test signal (Ignition timing, idle speed,
Malfunction code No.)
20. Throttle valve fully closed/fully open
condition 16. Distributor (G-signal) DOHC)
17. P/S pressure switch
18. 1-2, 2-3, 3-4, Lockup solenoid
19. Diagnosis connector
(TEN terminal)
20. Throttle sensor (MTX)
21. Throttle valve opening angle
22. Turbine sensor 21. Throttle sensor (ATX) .__r
F-10

F EXHAUST SYSTEM
EXHAUSTSYSTEM
COMPONENT PARTS
Removal / Inspection / Installation
1. Remove in the order shown in the figure.
2. Check the exhaust component parts and repair or replace if necessary.
3. Install in the reverse order of removal.
29149
(3.0-5.0, 22-36) .
^ _ ^.S_
T,
nrrwCE
O-55 (4.1-5.6, 30-41)
N.m (m-kg, ft-lb
23UOFX-1
1, Main silencer
Inspect for deterioration and restriction
2. Pre-silencer
Inspect for deterioration and restriction
3. Catalytic converter
Inspect for deterioration and restriction 4. Front pipe assembly
Inspect for deterioration and restriction
5. Exhaust manifold
Inspect for deterioration and cracks
6. Exhaust manifold insulator
7. Oxygen sensor
Inspection . . . . . . . ..*...................... page F-171 --
‘Y’
F-l 36

NTROLSYSTEM F
STRUCTURAL VIEW
To reduce CO, HC, and NOx emissions, the following systerns are employed
1. Positive crankcase ventilation (PCV) system
2. Evaporative emission control system
3. Catalytic converter
SEPPRATOR
ECK-AND-CUT
CHARCOAL CANISTER