ECU MAZDA 323 1992 Workshop Manual Suplement

MAlNTENANCE NOTE GI
.
FREE ROLLER
I t 3EGlX-304
MAlNTENANCE NOTE
SPEEDOMETER TESTER CHECK
Caution
l Do not clutch abruptly.
l Do not attempt rabbit starts or accelerate quickly. 13EGIX-302
[Front wheel free-roller method]
1. Set the free roller securely on the floor under the front wheels
by matching it to the wheel base and front tread.
2. Place the vehicle softly on the tester and free roller.
3. Start the engine, and engage the clutch softly at a low speed
in 2nd gear; then gradually increase the speed.
4. Upon completion of the test, stop the engine by gradually
decelerating with soft braking.
[Front wheel jack-up method1
1’. Place the rear wheels on the roller.
2. Jack up the front wheels and mount on a safety stand.
3. Start the engine, and engage the clutch softly at a low speed
in 2nd gear; then gradually increase the speed.
Caution
l When using either the front wheel free-roller meth-
od or front wheel jack-up method, secure the vehi-
cle to prevent forward and lateral movement by
attaching towing hardware (chain or wire) to the
front and rear tow hook or tie-down hook.
BRAKE TESTER CHECK
Caution
. To stabilize the drag force of the viscous coupling,
conduct the brake test after the speedometer test.
1. Place the wheels to be tested (front or rear) on the roller.
2. Shift itit0 NEUTRAL.
3. Drive the tester roller and check.
a-9

GI IDENTIFICATION NUMBER tOCATlONS/UNlTS/ABBREVIATlONS
IDENTIFICATION NUMBER LOCATIONS
VEHICLE tDENTtRCATtUN NUM8ER (VIM) ENGINE MODEL AND NUMBER
I
UNITS
N.rn { kgf m or kgfcm,
f-t&f or tn.lbf 1 . . . . . . . . . . . . . . . . Torque
rpm ._ . . . Revolutions per minute
A.. ,_...___.... Ampere(s)
v I... Volt(s)
$2 . .._..__......_.....__... Ohm(s) (resls‘tance)
kPa { kgflcm*, psr] . . . . . . . Pressure
{usually positive)
mmHg I inl-lg ] . . . . . . . . . Pressure
(usually negatrve)
W . . . ._ .._.__ .._ . . . . . . ..,......... Watt
titers [US qt, Imp qt 1 . V&me
mm { rn 1 . . . . . . . . . . . . . . . . . . . . . . . Length
89UOGX-006
ABBREWATIONS
ABDC _. . . . . . . . . . . After bottom dead
center
A/C . . . . . . . ._.. _. . . . . . . . . Air conditioner
ACC .__ . . . . . . . Accessones
ATX .._ ._ . . . . . . . . . . . . . . Automate transaxle
ATDC _.. __ _. . . . . After top dead center
ATF ,... ._....__._.. Automatic transmission
fluid
BAC ._ . . . . . . . . . . . . . . ,. Bypass air control
BBDC _. . . . . . . . . . . . . .._. Before bottom dead
center
BTDC ., ._._... . . . Before top dead center
CPU . . . . . . . . . Central processrng unit EC-AT
........................... Electronrcally-controlled
automatic transmlsslon
ECU ._ ....................... Engine control unit
EG 1 ..................... Electronc gasoll ne
injectron
E/L. ............................ Electrrcal load
EX .............................. Exhaust
IC ................................ Integrated clrcult
IGN ........................... lgnrtlon
IN ..... ........................ Intake
INT
............................... Intermittent
ISC ............................ Idle speed control
U-l ................................
Left hand
M..
........................... Motor
MIL
........ ...................... MatfunctIon Indicator
iamp
MTX. ........................... Manual transaxle
00.. .............................. Overdnve
Of F .............................. Swrtch off
ON
............................... Switch
on
PCV .............................. Positive crankcase
ventilation
PRC .......................... Pressure regulator
control
P/S ............................. Power steerrng
P/W ............................
Power window
RH ............................... Rlght hand
SST
............................. Special service tool
ST.. ............................... Starl
SW.. ............................. Switch
TDC. ............................ Top dead center
4WD .............................
4-wheel drive
03UGIX-802
INS7
If a t’
and
Whe
1, II-!
2. II-!
3. E-
4. Dr
W-1 2

..,. .
a
._
GI CAUTKN
PRECAUTIONS TO TAKE WHEN SERVICING AN ELECTRICAL SYSTEM l Note the following items when servicing the electrical system.
l Do not alter the wiring or electrical equipment in any way; this may damage the vehicle or cause a fire
from short-circuiting a circuit or overloading it.
l The negatrve (-) battery cable must be removed first and
rnstalled last. l Do not reptace with fuses exceedrng specified capacity
Cautron
l 8e sure that the ignitton and other switches are off
before disconnectrng or connecting the battery cables.
Failure to do so may damage the semrconductor
components. Caution l Repfacing a fuse with one of a larger capacrty than
desrgnated may damage components or cause a frre.
l Secure harnesses with provrded clamps to take up slack. l Tape areas of the harness
that may rub or bump l When mounting
components, be sure the
against sharp edges to
protect rt from damage. harness IS not caught or
damaged.
Caution
l Clamp all harnesses near vibratrng components (for
example, the engine) to remove slack and to prevent
contact resultrng from vibration. i Drsconnect heatsensitive l Make sure that the
parts (for example, relays
and ECU) when performing connectors are securely
connected when installed.
l Do not handle electrical components roughly or drop
them. maintenance (such as
weldrng) where
temperatures may exceed
80°C [176OFj.
-*
HI

CAUTION GI
HANDLING CONNECTORS
Caution
*‘Be sure to grasp the connectors, not the wires, when disconnecting them.
1. Raise the rear
2. Lift the tab with a
thin piece of metal
and remove the
poor termrnat contact.
Lift the tab with a thin
When using a matching Make sure the termmals
male terminal, make are
not pushed out of
sure there
IS no
c Round connectors >
1. Raise the cover.
2. Lift the termrnal to
3. Make sure the
terminal is securely
mounted in the
Pull lightty on individual
wires to check that they
are secured rn the 1. Raise the cover.
2. Remove A.
3. Lift the tab with a
thin piece of metal
and remove the

82 INSTRUCTlUN FOR HANDLING METALUC SODIUM-FltLED EXHAUST VALVE
1NSTRUCTION FOR IiANDLlNG METALLIC SODIUM-FILLED EXHAUST VALVE
improper handling of metallic sodium can cause sever burns, loss of eye sight, and the production of
htghty ftammabie hydrogen gas. Therefore, handle and dispose of such valves carefully.
First aid
l If metallic sodium get into your eyes, quickly fiush it out with large amounts of water. See a
physician.
l If it gets on your skin, wash it off with plenty of water. See a physician.
l If it catches fire, use a dry powder fire extinguisher or dry sand to put it out. Never use water.
Note
l Do not use the valve as tool.
l Do not drain the metaltic sodium from the vatve.
l Neutralize the metallic sodium-filled valve before its disposal.
Re!e;,nEe
l
T is embossed on the valve head to identify a metallic sodium-filled exhaust valve. 13E082-309
IDENTIFICATION MARK
0 C8
T
9Omm 13.5 in] Disposal procedure
Follow the procedure below to neutralize the valve.
(1) Prepare a water-filled bucket (10 Liters [ 11 US qt? 8.8
Imp qtj or more> and a dry powder fire extinguisher in
a well ventilated place.
(2) Wear safety glasses and gloves.
Note
l If the valve is broken skip Step (3).
I
1 X002-31 1
, (3) Secure the valve in a vice and, using a hacksaw, cut
a few 1.5mm [ 0.059 in) deep slits 30-90mm 11.2-3.5
in) from the valve stem end.
(4) Quickly submerge the valve in the bucket of water. vreat
up to eight valve at a time.)
:
1
t3EOB2-312 (5) Leave the valve in the water for about one hour until
the bubbles stop. (Stir occasionally with a metat rod for
complete reaction.)
Caution
l Do not reach into the solution or let it get on your
skin or clothing; burning may result.
(6) Remove the valve with tongs and dtspose of as for a
conventional part.
(7) Follow local regulations fbr disposal of the solution. /
q Tht-i
i tmr
Engin
l Rer.
l Ins;
l The
eng
proc

F3
c
FUEL AND EMISSION
CONTROL
SYSTEMS
i
INDEX . . . . . . . . l ..,.... *..,. . . . . . . m...*.*...*..... F3- 2
UUTLtNE
...................................... F3- 4
OUTLINE OF CONSTRUCTION.. ....
F3- 4
SYSTEM DIAGRAM ...................... F3- 5
VACUUM HOSE ROUTING
DIAGRAM
................................. F3- 6
WIRING DIAGRAM.. .....................
F3- 7
ECU RELATIONSHIP DIAGRAM ...... F3- 8
SPECIFICATIONS.. ....................... F3- 9
TURBOCHARGER CONTROL .......... F3-IO
OUTLINE
.................................... F3-10
SYSTEM DIAGRAM ...................... F3-10
WASTEGATE CONTROL ............... F3-11
FUEL SYSTEM
.............................. F3-12
OUTLINE ....................................
F3-12
CONTROL SYSTEM .......................
F3-13
STRUCTURAL VIEW .....................
F3-13
PRESSURE REGULATOR
CONTROL SYSTEM ....................
F3-14 SUPPLEMENTAL SERVICE
tNFOF?MATtON
............................. F3-I 5
SELF-DtAGNOStS FUNCTtON.. ........
F3-16
OUTLINE ....................................
F3-16
SERVICE CODE NUMBERS..
......... F3-16
TROU8LESHOOTtNG GUtDE
........... F3-19
RELATIONSHtP
CHART.. F3-19 ..............
DIAGNOSTIC JNDEX
.................... F3-20
PRECAUTIONS
............................
F3-21
SYMPTOM TROUBLESHOOTING .... F3-22
TURBOCHARGERCONTROL
SYSTEM ......................................
F3-37
TURBOCHARGER F3-37 ........................
WASTEGATE SOLENOID VALVE.. .. F3-38
INTERCOOLER ............................
F3-39
FUELSYSTEM ..............................
F3-40
FUEL PUMP ................................
F3-40
FUEL PUMP RESISTOR/RELAY ......
F3-40
PRESSURE
REGULATOR .............. F3-41
INJECTOR ..................................
F3-42
INJECTOR RESISTOR
................... F3-42
PRESSUR REGULATOR CONTROL
SYSTEM ......................................
F3-43
SOLENOID VALVE (PRESSURE
REGULATOR CONTROL)
............. F3-43
CONTROL SYSTEM
....................... F3-44
PREPARATION ............................ F3-44
ENGINE CONTROL UNIT (ECU) ..... F3-45
7 3EOF3-301

F3 INDEX
INDEX
I
J
D1AGNOSIS
CONNECTOR
SELF-DlAGNOSIS
1. Turbocharger
Removal I installation . . . . . . . . . . . . . . . . page F3-37
2. Wastegate solenoid valve
inspection . .__._. ._. . . . . . . . . . page W-38
3. Injector resistor
Inspection __ __,., __ . page F3-42 4, I ntercooler
Removal / Installation . . . . . . . .._...... page F3-39
5. Engine control unit (ECU)
lnspect~on . . . . . .._........... . . . . . . . . . . . page F3-45
F3-2
--
I. Inject
IfI;
Vr,
2. Press
In3
3. Sole-l
Ins

F3 OIJTUNE
SPE
* TEN
The @
ECU RELATtONSHtP DtAGRAM
1NPUT DEVICE
KNOCK SENSOR
c AIRFLOW METER
KNOCK
DlSTRlBUTOR
91c YfTC”
THERMOSENSOR
OXYGENSENSOR N EUTRAti
CLUTCH SWITCH
CONNECTOR
(TEN TERMINAL,)
INTAKE AIR
OUTPUT
DEVtCE THERMOSENSOR
{AIRFLOW METER)
CIRCUIT
OPENING
TURBOCHARGE
jAGNOSE
ONNECTOR
EN/MEN TERMINA
h SOLENOID VALVE
(PRESSURE REGUL+TOR
CONTROL)
WASTEGATE
SOLENOID VALVE IGNITER
- - (TURBtiHARGER)
FUEL PUMP
RESlSTORlRELAY
SOLENOID VALVE
(PURGE CONTROL)
F3-8 13EOF3-311

F3 CONTROL SYSTEM
PRESSURE REGULATOR CONTROL SYSTEM
SOLENOID VALVE TO MAIN RELAY
(PRC HIGH TEYP.)
t ECU
I
PRESSURE REGULATOR
// VACUUM

IJ WATER
THERMOSENSOR
F----------- lNTAKE AIR
THERMOSENSOR
SWITCH SOLEltolD VALVE
(PRC LOW TEMP.)
TO FUEL TANK
13EOF3-31 To prevent vaporlock in the fuel system during hot restart idle, a two-stage pressure regulator is adoped
to the new 323 4WD.
Low temperature operation: The vacuum to the pressure regulator (A and B ports) is cut (solenoid valve
[low temp.] UN), and the fuel injection pressure is increased to 284 kPa (2.90 kgf/cm2, 41 psi ) ,
High temperature operation: The vacuum to the pressure regulator (A port) is cut (solenoid valve [high
temp.] ON), and the fuel injection pressure is increased to 343 kPa [ 3.5 kgf/cm2, 49 psi 1.
Condition and operation
Condition Operation
1
coolant Intake alt Solenoid vrlve Solenoid vatve Opemtlon
I temperature temperature Engine (Idw temp.)
(high temp.) time Operation 40% [fU40f)-
Above 90°C 5U°C (t22OFI ON OFF 180s Low temp.
f f940Fj No load
Above 5O*C
I122OF) OFF ON 210s t-ltgh temp.
3
t3EOF3-319
F3-14 Wast
l Ins fuel
l In:; InJeci
l In:;
l Vol Injecl
l In:;
Presr
l SCI Engir
l InsI

SUPPLEMENTAL SERVICE INFORMATION .
I
The following points in this section are changed in comparison to the Mazda 323 4-Wheel Drive Work-
shop Manual [I 229-l O-89t].
Turbocharger
l Removal / Installation
Wastegate solenoid valve
l Inspection
htercooter
l Removal I Installation
Fuel pump (main)
l Inspection
Fuel pump resistor/relay
l System operation
l Inspection
Injector
l Inspection
l Volume test
Injector resistor
l Inspection
Pressure regulator control system
l Solenoid valve (pressure regulator control}
Engine control unit (ECU)
l Inspection 13EOF3.320
F3-I 5