MAZDA 323 1992 Suplement Service Manual

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

OUTLINE F3
SPEClFiCATlONS
Iten
Idle speed’
tgnltion trming * Engine
m
BTDC BP TURBO
800 f 50
IO f 10
Fuel pump
Maximum output pressure kPa { kgflcm’, psi 1 1 490-736 {SO-7.5, 7t-110)
Transfer pump
Maximum output pressure
Fuel filter kPa { kgf/cm2, psi ) 1 , 39 10.4, 5.7 1 or higher
Nylon element (in fuel pump)
Idle-speed control (fSC) valve
Type
Resistance I Rotary
nt
11-13 [at 2O*C [68*F)]
Solenoid va tve (purge contra I)
,I
Resistance -2o*c I -4Of 1 14.6-I 7.8
2.21-2.69
.kQ , 2o”c { 68OF)
40% f104*f 1 1.0-l .3
Resistance
Fuel tank
Capacity
Air cleaner
Etement type
Fuel
Specification L {US gal, Imp gal) [ Approx. 6 [at 20°C f 68*FJ]
60 (15.9, 13.2)
01 permeated
Unleaded premium (RON 95 or higher)
11FrlC?.7 11
l TEN terminal of diagnosis connector grounded.
The I; mark indicates newly equipped Parts. l”L”l “VI I
F3-9

F3 TURBOCHARGERCONTROL
TURBOCHARGERCONTROL
OUTLINE
l The-capacity of the air-to-air intercooler is increased to reduce the intake air temperature and to the tm-
prove engine performance.
l With addition of the improved wastegate control system, the engine’s high rpm torque is increased.
TURBOCHARG
INTERCOOLER
SYSTEM DIAGRAM
WASTEGATE SOLENOrD VALVE
F3-10

TURBOCHARGERCONTROL F3
WASTEGATE CONTROL
The engine control unit controls the wastegate solenoid valve by duty signals to better control the boost
pressure, increasing the engine’s power and response.
*
13EOF3.313
System Diagram r
DUTY VALVE
INTAKE AIR THERMOSENSOR (AIRFLOW METER)

F3 FUEL SYSTEM
FUEL
SYSTEM
OUTLINE
l Thspressure regulator has two vacuum ports for its two-stage operation. (Refer to page F3-43.)
l The injectors are changed from high-ohmic type to low-ohmic type for improvement of the supply of fuel
during high-speed engine operation.
l To decrease the current in the injectors, an external resistor is equipped and is mounted on the aircleaner
housrng .
13EOF3315 Pressur regulator
VACUUM PORTS
F3-12 13EOF331;

:
:
1 , ._.s_ , -. _ ._>_ ‘r--A.-
_, . :. . . . . .-
CONTROL SYSTEM F3
CONTROL SYSTEM
STRUCTURAL VtEW
SOLENOID VALVE
PRESSURE RE
LUTCH SWlTCH
FUEL INJ RELAY
NTAKE AIR THERMOSENSOR
AIRFLOW METER)
WATER THERMOSENSOR
F3-13

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

F3 SELF-DIAGNOSIS FUNCTfON
SELF-DIAGNOSIS FUNCTION
OUTLINE
Theself-diagnostic function and diagnosis procedure are the Same as for the previous 4WD model. How-
ever, there is an additional service (malfunction) code (N0.35) for the new modet.
13EOF3-321
SERVICE CODE NUM8ERS
Sensor or
subsystem
NE-signal
G stgnal
Knock sensor I Malfunction display
Cond &ion Fail-safe
Service
code no. Output signal pattern
No NE-signal
ON
-
02
OFF
M
No G srgnal Cancels two-group injection ON
03
OFF
ml
Open or short circuit
pressure sensor
F3-16
--
I

SELF-DIAGNOSIS FUNCTION F3 I
Open or short crcuit
13EOFS322
Caution l If there is more than one failure present, the code numbers will be indicated in numerical or-
der, lowest number first.
l After repairing a failure, turn off the ignition switch, disconnect the negative battery cable,
and depress the brake pedal for at least twenty seconds to erase the service code from the
ECU memory. II
F3-17