sensor MAZDA 232 1990 Suplement User Guide

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

-- -
“-
I t-
SQLENOlD VALVE AEAR WINOOW
(PRESSURE IQNITION HEADLIG t IT
DEFFIOSTER
REGULATOR SWITCH SWITCH
SWITCH
CONTROL)
lNJECTOR ELECTRICAL
MAIN RELAY , FAN
AX SWITCH
r DliiGNOSlS BLOWER Ivc
CONNECTOR SWITCH RELAY
ECU
AIRFLOW METER
Tt
WATE!
THERMOSENSOR
CLUTCH [/ t
-I
’ NEUTRAL
SWITCH SWITCH 4X4 CONTROL UNIT
1
FbEL
PUMP
TRANSFER PUMP TRANSFER
PUMP SWlTCtJ

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

F2 OUTUNE
OUTLINE OF CONSTRUCTION
The fuel and emission control system of the new 323 4WD model is basically the same as that of the new
323 2WD modet; however, a turbocharger and knock control system are added to the BP TURBO model
and 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. A transfer pump is also equipped to pump the fuel from the left
to the right
(fuel pump side) section of the fuel tank.
The major points of difference between the 2WD model and 4WD model are as shown below.
93GOF2-705
Difference
Component 2WD 4WD
BP SUHC BP OOHC BP SOHC BP TURBU Remark
INTAKE AG! 1 Resonance duct 0 0 0 - -
SYSTEM
Resonance chamber 0
0 G -
VICS .-
ui- - -
Turbocharger - - -
0 Refer to page
FZ-12
I ntercooler - - -
0 Refer to page FZ-14
Air bypass valve - - -
0 Refer to page F2-14
FUEL SYSTEM Fuel pump control - - -
0 Refer to page F2-16
Transfer pump - -
0 0 Refer to page F2-18
Operating time for BP
Pressure regulator control 0 0 0 0
TURBO is different
(Refer to page F2-23)
Fuel pump reststorlrelay - - -
0 Refer to page F2-18
EVAPORATIVE
EMISSION
Fuel vapor vatve - -
CONTROL 0 0 Refer to page F2-16
SYSTEM
CONTROL
SYSTEM Point type
0 0
Throttle sensor 0 (MTX) -
-
Variable type - -
0 W-x) 0
Without heater
0 0 0 -
Oxygen sensor F
With heater - -
- 0 Refer to page F2-23
Water thermoswitch (on radiator)
-
Knock control system -
Overboost wami ng buzzer -
Turbocharge Indicator - -
C @TX) - NC cut-off system
- - 0
Refer to page F2-22
- -
0 Refer to page F2-21
- - 0 Refer to page F2-21
93GOF2-706

SOLENOID VALVE
CHECK VALVE
r----+ (PURGE CONTROL)
CHiRCOAL
I CANISTER
INTERCOOLER 11 ’ 1 ‘I A-4
II II -
AIR , BYPASS
II ,.-ok----,/ ,CHECK VALVE
(TWO-WAY)
1-1
---II
-d KNO&
II II I I II VALVE
VALVE
THERMOSENSOR
c
I 31c
SENSOR 1 k---k FUEL FILTER
TRANSFER
PUMP
WASTEGATE 7
II t I III TURtiOCHARGERI~
I SOLENOID I II - i 1 WASTFGATF II I
AlOCI fuAl RAlz-rCD
VALVE
le-SIGNAL* -
EJ 0
G-SIGNAL-
DISTRIBUTOR
CATALYTIC CONVERTER ftl”FLLt”” IVIL I =r,
(WITH INTAKE THERMOSENSOR)
*TO ENGINE CONTROL UNIT

F2 OUTLINE
ECU RELATIONSHIP DlAGRAM [BP TURBO]
INPUT DEVICE KNOCK SENSOR
KNOCK
i( CONTROL
DlSTRlBUTOR ,-, UNIT
NC SWITCH
--k/L SWITCHS
{REAR WINDOW DEFROSTER SWITCH.
HEADLIGHT SWITCH, BLOWER SWITCH,
ELECTRICAL FAN SWITCH)
BATTERY A
THRO77LE
SENSOR
NEUTRAL/ IDENTIFICATION
CLUTCH SWITCH
DIAGNOSIS
CONNECTOR
(TEN TERMINAL) INTAKE AIR
THERMOSENSOR
OUTPUT DEVICE
CIRCUIT
OPENING
SOLENOID VALVE
(PRESSURE REGULATOR
WASTEGATE
SOLENOID VALVE
RESISTOR/RELAY
SOLENOID VALVE
(PURGE CONTROL)
93GOFZ-71
F2-10

OUTLINE F2
SPECIFICATIONS
Low-pressure stde
1 High-pressure side
Nylon element (rn fuel pump)
Paper element
-
Pressure regulator
Regutating pressure .
t kPa (kg/cm2, psi) 1 265-3-l 4 (2.7-3.2, 38-46)
-t
Injector
me
Type oi drive
Resrstance
Idle speed cantrol (EC) valve
Type
Resistance
Purge control solenoid valve
Resistance Q
D
s2 [ High-ohmic
Electromechanical
12-76
Rotary
II-13
23-27
Water thermosensor
Resistance
Airflow meter
1 -20% ( -4V) 14.6-I 7.8
kf2
2o”c ( 68OF) 2.21-2.69
4OOC (104OF) 1.0-I .3
8O*C
(176OF) 0.29-0.35
E2++Vs Fully closed 200-600
Fully open 20--l ,200
Resistance Ez-Vc
E?+THAA
(1 ntake air
thermosensor)
200-400
-2o*c ( -4*F) 13,600-I 8,400
20°C ( 68*F) 2,2f O-2,690
60°C (14cPf) 493-667
I
Air cleaner
Element type
Fuel
Specification
* TEN terminal of diagnosis connector grounded.
The t mark indicates newly equipped parts.
Oi! permeated
Europe.....Unhzaded premium
Unleaded reguiar (RON 95 or higher)
(RON 91 or higher) Australia...Unleaded regular
(RON 91 or higher)
93GOF2-7 i 3

F2 CONTROL SYSTEM
CONTROL
SYSTEM
STRUCTURAL VIEW
OXL STOPLIGHT SWITCH CLUTCH SWITCH
INJECTOR
P/S PRESSURE
SWITCH
‘GEN SE877
DtSTRIBUTOR
/ PUMP
CONTROL UNll
CONTROL UNIT
CONNECTOR
P REStSTORlRELAY
FUEL tNJ RELAY (MAIN RELAY)
AIRFLOW METER
SOLENOID VALVE
I NEUTRAL SWITCH
(PRESSURE REGULATOR)
WATER THERMOSENSOR
93GOf2.729

F2 CONTROL SYSTEM
KNOCK CONTROL SYSTEM [BP TURBO]
This svstem retards the ignition timina when enaine knocking occurs because of usage of low octane fuel, etc.
1NTAKE
MANIFO
KNOCK SENSOR
(INSTALLED BETWEEN No.2 AND
No.3 CYLINDER)
IGNITER
KNOCK iX?NTROL
UNIT
Operation
When the engine vibrates, the knock sensor generates a slight voltage signal that is the sent to the knock
control unit. The knock control unit determines whether the signal is a knocking signal. If it is a knocking
signal, the ignition spark is retarded according to the intensity of the knock to a maximum of 4O.
Inhibition of spark retardation
In order to improve drivability and fuel economy, the ECU inhibits the above spark retardation when the
‘engine load Ls light, the coolant temperature is below O°C (32OF), the engine is cranking during engine test
conditions.
Note
l The knock ~ensur and knock control unit cannot be inspected individually.
When a matfunction code number 05 is indicated, replace the knock controt unit or sensor
only after inspecting the related wiring and connectors.
F2-22