fuel pressure MAZDA 232 1990 Workshop Manual Suplement

A PRE-DELIVERY INSPECTION
PRE-DELIVERY INSPECTION TABLE
pieziG-
INSPECT and ADJUST, if necessary, the following Items to
specification:
D Glass, exterior bright metal and paint for damage
Cl Wheel tug nuts
9 Trre pressures
LII All weatherstrips for damage or detachment
Z Operation of bonnet release and lock
D Operation of trunk lid, hatch and fuel lid opener
(it equipped)
3 Door operation and alignment
5 Headlight aiming
INSTALL the following parts:
D Wheel caps or rings (if equipped)
D Outside mirror(s)
[ UNDER BONNET-ENGINE OFF )
INSPECT and ADJUST, if necessary, the foIlowIng items to
specification:
Cl Fuel, coolant and hydraulrc lines, fittings, connections and
components for leaks
Cl Engine oil level
0 Power steering fluid level (if equipped)
D Brake master cylinder fluid levels
0 Clutch master cylinder fluid levels (if equipped) q
Windshield washer reservoir fluid level
D Radiator coolant level and specific gravity
Ll Tightness of water hose clamps
I3 Tightness of battery terminals, electrolyte level and specific
gravity
c) Manual transaxle oit level
D Drive belt(s) tension
C; Carburetor linkage (choke control, wide open throttle posi-
tion, etc.) (carburetor model only)
D Accelerator cable and linkage for free movement
D Headlight cleaner and fluid level (if equipped)
BLEED air from fuel line (diesel engine only)
CLEAN the spark plugs (except for diesef engine)
piicis-1
INSTALL the foflowing parts:
C Rubber stopper for inside rear view mirror (if equipped)
c! Fuse for accessories
CHECK the operation of the following items:
Cl Seat controls (sliding and redining) and head rest
ci Seat belts and warnrng system
Z! Ignition swrtch and steering lock
III Power window {if equipped)
0 Door locks including child proof door locks
0 Inhibitor switch
(ATX only)
Z All lights including warning and indicator lights
0 Ignrtron key reminder buyer (if equipped) Cl Horn, wipers and washers (front and rear, if equipped)
D Antenna (if equipped} q
Cigarette lighter and clock (if equipped)
I2 Remote controt outside mirror
(if equipped) q
Heater, defogger and air conditioner at various mode selec-
tions (if equipped)
c3 Sunroof (if equipped)
CHECK
the fotiowing items: q
Presence of spare fuse
c3 Upholstery and interior finish
CHECK and ADJUST, if necessary, the following items:
Cl Operation and fit of windows
D Pedal height and free ptay of brake and clutch pedal
Cl Parking brake
i UNDER BONNET-ENGtNE RUNNING AT ]
1 OPERATtNG TEMPERATURE
CHECK the following items:
Cl Operation of idle-up system for air conditioner or power steer-
ing (if equipped)
13 Automatic transaxle fluid level
D Initial ignition timing
(except disel engine) q
Idle speed
El Operation of throttle position sensor (EGI engine)
13 Operation of cold start device and glow plug warning light
(diesel engine only)
D Operation of dash pot [EGI engine)
t
ON HOtST 1
CHECK the following items:
U Underside fuel, coolant and hydraulic lines, fittings, connec-
tions and components for leaks q
Tires for cuts or bruises
Cl Steering linkage, suspension, exhaust system and all under-
side hardware for
looseness or damage
1 ROAD TEST 1
CHECK the foliowing items:
II Brake operation
D Clutch operation
0 Steering control
c3 Operation of meters and gauges
0 Squeaks, rattles or unusual noises q
Engine general performance
c3 Emergency Iocking retractors
rAFTER ROAD TEST 1
REMOVE the seat and floor mat protective covers
CHECK for the necessary
owner information materials, tools
and spare tire in vehicle
93EOAX-002
A-2

OUTLINE Bl
UUTLlNE OF CONSTRUCTtON
The BP SOHC engine for the 4WD model is the same as for the 2WD model, except that the flywheel is
shaped differently.
The 3P SOHC engine for the ECE specification (without catatyst) 4WD model is the same as the ECE US83
model, except that the fuel and emission control system and the engine electrical system are modified.
(Refer to Sections Ff and G.)
93G08 i -702
SPEClFlCATlONS
Item
TVDG?
Engine/Market ’
AustraIia BP soffc
Europe us-83
1 Without catalyst Gasoline. 4-cvcle
Cyirnder arrangement and number
Combustron chamber
Valve svstem In-line, 4 cylinders
Pentroof
OI-IC, belt-driven
Fi rtng order *
. ..TEN terminal of diagnosis connector grounded. 1-3-4-2
I 93G08 l-704
IN 0: Maintenance-free
mm (in)
EX
0: Maintenance-free Dsplacemenr cc (cu in) 1,839 (112.2)
Bore and stroke mm (In) 83.0 x 85.0 (3.27 x 3.35)
Comoression ratio
Compressron pressure I 8.9
I I kPa (kglcm2, psi)-rpm 1,197 (12.2, 173)300
Valve tlmtng Open BTDC 2O
IN
Close ABDC 5u”
c
Open BBDC so
EX
Close ATDC 8’
Valve clearance
Idle speed -~
Ml-x 750 f 50’ 850 f 50
rpm . I ATX 750 f 50” - I I I ignrtton trming BTDC 1 50 f 10’
1
Bl-3

Bl SUPPLEMENTAL SERVICE tNFORMAT1ON, REMOVAL
SUPPLEMENTAL SERVICE INFORMATION
The following points in this section are changed in comparison with Workshop Manual [Europe (I 203-I U-89F),
Australia (1204- 1 O-89!=)].
Engine
l Removal
l Installation 93GOF31-705
REMOVAL
Warning
w Release the fuel pressure.
PROCEDURE
1. Disconnect the negative battery cable.
2. Drain the engine coolant and transaxle oil.
3. Remove in the order shown in the figure, referring to Removal Note.
Step 1
t
I
*ATX ONLY 1
93GOBl-706
1. Undercovers
2. Side covers
3. Resonance chamber and air cleaner assembly
4. Battery bracket, cover and bafiery
5. Battery carrier and battery duct
6. Accelerator cable
7. Radiator hose
8. Coolant reservoir hose
9. Cooling fan connector
IO. Radiator switch connector (ATX)
1 f . A/C cut switch connector (ATX) 12. Oil cooler hoses (ATX)
13. Radiator bracket
14. Radiator and cooling fan assembly
15. P/S and/or A/C drive belt
16. P/S oil pump and bracket
Removal Note .._...._...__......... . . . . . . . page BY -7
17. A/C compressor
Removal Note.. . . . . . . . . . . . . . .._. . . . . . . . ._. page Es1 -7
i 8. Crossmem ber
19. A/C compressor bracket
20. Coolant reservoir
61-6

B2 REMOVAL
REMOVAL
Warning
l Release the fuel pressure. (Refer to Section FZ.)
PROCEDURE
i. Disconnect the negative battery cable.
2. Drain the engine coolant and transaxle oil.
3. Remove in the order shown in the figure, referring to Removaf Note
Step 1
1. Strut tower bar
2. Undercovers and side covers
3. Air cleaner assembly
4.
Battery bracket
5. Battery cover
6. Battery
7. Battery carrier
8. Accelerator cable
9. Radiator hoses
10. Coolant reservoir hose
f I. Cooling fan connector
12. Radiator switch connector
13. Radiator bracket
14. Radiator and coofing fan assembly
15. Battery duct
16. Air pipe and air bypass valve
17. Intercooler and air pipe
Removat Note . . . . . . . . . . . . .._.. m _._._..., page 82-U
18. Air pipe and gasket
19. P/S and/or AK drive bett
20. P/S oil pump and bracket
Removal Note . . . . .._.__.....~..~........ page BZ-13
21. A/C compressor
Removal Note . . . . . .._................... page 82-I 3
22. Crossmember
02-12

OUTLINE Fl
OlJTLlNE OF CONSTRUCTION
The fuel and emission control systems of the New 3.23 BP SOHC-engine equipped 4WD model are basically
the same as those of the New 323 8P DOHC-engine equipped 2WD model, however, the fuel tank is designed
with separate right
and left sections due to the installation of the propeller shaft for the 4-wheel-drive system
and
a transfer pump is equipped to pump the fuel from the left to the right (fuei pump side) section of the
fue! tank. The following chart shows the differences between the major parts of the BP DO% 2WD model
and the BP SOHC 4WD model.
33GO”l-703
Difference
I t
Part BP DOHC 2WD 1 BP SOHC 4WD Remark Transfer pump -
0 Due to
installation of propeller shaft
Variable Inertra charging system 0 -
Two group fuel qectron Due to change of engine
-
G-slgnal (Drstnbutor) 0
I -
Due to abolishment of two group fuel Injection
93GOfl-70s
SPECIFICATIONS
Item
Idle speed
Ignition timing * Engine
vm
BTDC BP SOHC
850 * 50
5 * to
Fuel DUtTlD I
Fuel filter
Type Low-pressure side
Htgh-pressure side Nylon element
Paper element
Pressure regulator
Regulating pressure kPa (kglcm2, psi) 1 264-314 (2.7-3.2, 38.3-45.5)
In
jfXt0r
Type
Resistance High-ohmic
12-16
Idbup solenoid vatve
Resistance Solenoid A _.._. 17-23, Solenoid 5, C ._... 27-36
Water themosensor
R&stance -20% ( -4OF)
kQ - . 20°C ( 689=)
40% (104OFj
80°C (176OF) 14.6-l 7.8
2.2-I -2.69
1.0-l -3
0.29-0.35
l TEN terminal of dragnosrs connector grounded.
The a (shading) rndrcates newly equipped parts

I
(WITH INTAKE AIR
THERMOSENSOR) AIR CLEANER METER
RESONANCE
CHAMBER /
SOLENOID VALVE
(PRESSURE REGULATOR CONTROL) FUEL FILTER
(HIGH-PRESSURE
SIDE)
P-“---j
Ne-S’GtiAL * ----El
DlSTRlfjUTOR IDLE-UP
SOLENOID VALVE
* TO ENGINE CONTROL UNIT ,CHECKVALVE
(TWO-WAY)
FUEL VAPOR VALVE
*
THERMOSENSOR
‘FUEL PUMP
FUEL FILTER
I TRANSFER PUMP

Fl FUEL SYSTEM
FUEL SYSTEM
OUTLlNE
PRESSURE REGULATOR
1
FUEL FILTER
I TRANSFER PUMP
i WEL PUMP
1 FILTEF
FUEL TANK
4x4 CONTROL UNIT (FUEL PUMP CONTROL UNIT)
The fuel system consists of the fuel tank, the transfer pump, the fuel pump, the fuel filters, the pressure regu-
lator, the delivery pipe, the injectors, and the 4x4 control unit (fuel pump control unit).
Fl-6

SUPPLEMENTAL SERVICE INFORMATION, FUEL SYSTEM Fl
SUPPLEMENTAL SERVICE INFORMATION
The following points in this section are changed in comparison with Mazda 323 Workshop Manuals
(I 203-I U-89F, 1204-I O-89F, I2061 O-89F).
fuel tank
l Removal I Inspection I Installation
4x4 control unit (Fuel pump control unit)
l Inspection procedure added
l Replacement procedure added
Transfer pump switch
l Inspection procedure added
l Replacement procedure added
Transfer pump
l Inspection procedure added
l Replacement procedure added
Exhaust system components
l Removai I Inspection I installation 93GOF? -706
FUELSYSTEM
PRECAUTION
Fuel Pressure Release and Sewicing Fuel System
Fuel in the fuel system remains under high pressure when the
engine is not running.
a) Before disconnecting any fuel line, release the fuel
pres-
sure from the fuel system to reduce the possibility of injury
or fire.
1. Start the engine.
2. Push the rear seat cushion buttons and remove the
cushion.
3. Disconnect the fuel pump connector.
4. After the engine stalls, turn off the ignition switch.
5. Reconnect the fuel pump connector and install the rear
seat cushion.
b) Use a rag as protection from fuel spray when disconnect-
ing the hoses.
Plug the hoses after removal.
c> When inspecting the fuel system, use a suitable fuel pres-
sure gauge.
Caution
l Install hose clamps to secure tile fuel pressure
gauge to the fuel filter and the fuel main hose to pre-
vent fuel leakage.
Priming Fuel System
After releasing the fuel pressure for repairs or inspection, the
system must be primed to avoid excessive cranking when first
starting the engine. Follow the
steps below.
I. Connect the diagnosis connector terminals F/P and GND
with a jumper wire.
2. Turn the ignition switch ON for approx. IO sec. and check
for fuel leaks.
3. Turn the ignition switch OFF and remove the jumper wire.
Fl-9

Fl FUEL. SYSTEM
FUEL TANK
Removal / inspection I Installation
Warning
l Before performing the following operation, release the fuel pressure from the fuel system to
reduce the possibiIity of injury or fire. (Refer to page Fl-9.)
l When removing the fuel tank, keep sparks, cigarettes, and open flames away from it.
l Before repairing the fuel tank, clean it throughly with steam to remove all explosive gas.
1. Remove in the order shown in the figure.
2. Inspect the fuel tank components visually and repair or replace as necessary.
3. Install in the reverse order of removal, referring to Installation Note.
FUEL PUMP (MAIN) TRANSFERPU
4341 (4.4-6.2, 3245)
GASKET, REPLACE
ET, REPLACE
4it-55 (4.3 -5.6, 3041)
Nm (m-kg, ft-lb)
a?cnc% .7*7

F2
FUEL AND EMISSION
CONTROL SYSTEMS
(WITH CATALYTIC CONVERTER)
.
INDEX ..*.........**.*.........*..........*...... F2- 2
OUTLINE ...................................... F2- 4
OUTLINE OF CONSTRUCTION.. .... F2- 4
SYSTEM DIAGRAM ...................... F2- 5
VACUUM HOSE ROUTING
DIAGRAM [BP TURBO] ............... F2- 7
WIRING DlAGRAM.. ..................... FZ- 8
ECU REtATlONSHIP DIAGRAM
[BP TURBO] .............................. F2-10
SPEClFtCATlONS. ........................ F2-11
TURBOCHARGER CONTROL
[BP TURBO] ................................ F2-I 2
OUTLINE .................................... F2-I 2
SYSTEM DIAGRAM ................. .; ... F2-12
WASTEGATE CONTROL ...............
F2-13
FUEL,SYSTEM
.............................. F2-15
OUTLINE
.................................... F2-15
CONSTRUCTlON ......................... F2-15
FUEL VAPOR VALVE ................... F2-16
FUEL PUMP CONTROL SYSTEM.. . F2-16
FUEL PUMP RESISTOR/RELAY ...... F2-18
TRANSFER PUMP CONTROL. ....... F2-I 8
CONTROL SYSTEM ....................... F2-20
STRUCTURAL VIEW.. ................... F2-20
OVERBOOST WARN!NG BUZZER
[BP TURBO] .............................. F2-21
TURBOCI-IARGE INDICATOR
[BP TURBO] .............................. F2-21
KNOCK CONTROL SYSTEM
[BP TURBO] .............................. F2-22
OXYGEN SENSOR [BP TURBO]. .... F2-23
PRESSURE REGULATOR CONTROL
SYSTEM [BP TURBO] ................. F2-23
A/C CUT-OFF SYSTEM (ATX) .........
F2-24 SUPPLEMENTAL SERVICE
INFORMATION ............................. F2-25
SELF-DIAGNOSIS FUNCTION .......... F2-26
OUTLINE
.................................... F2-26
MALFUNCTION CODE NUMBERS . . F2-26
TROUBLESHOOTtNG GUIDE
[BP TURBO1
................................ F2-31
RELATlONSHlP CHART ................ F2-31
SYMPTOM TRUUBLESH0OTlNG .... F2-32
tNTAKE AIR SYSTEM ..................... F2-43
COMPONENTS ............................ F2-43
TURBOCHARGERCONTROL
SYSTEM ...................................... F2-45
PREPARATION ............................ F2-45
SYSTEM OPERATION ................... F2-45
WASTEGATE ............................... F2-45
WASTEGATE SOLENOID VALVE.. .. F2-46
TURBOCHARGER ........................ F2-46
AIR BYPASS VALVE ..................... F2-48
INTERCOOLER ............................ F2-49
FUEL SYSTEM .............................. F2-50
PREPARATION ............................ F2-50
PRECAUTION ............................. F2-50
FUEL TANK
................................ F2-51
TRANSFER PUMP CONTROL
SYSTEM ................................... F2-52
FUEL PUMP CONTROL UNIT ........ F2-53
TRANSFER PUMP SWITCH ........... F2-54
TRANSFER PUMP.. ...................... F2-54
FUEL PUMP RESISTOR/RELAY ...... F2-56
INJECTOR
.................................. F2-56
EXHAUST SYSTEM
COMPONENTS .................................................... ;ff;
CONTROL SYSTEM ....................... F2-59
PREPARATION
............................ F2-59
ENGINE CONTROL UNIT (ECU) ..... F2-59
OXYGEN SENSOR ....................... F2-68
KNOCK SENSOR ......................... F2-69
93GOF2.701