relay MAZDA 232 1990 Workshop Manual Suplement

I OWGIX-028
1 SMUG IX-027
gMi)GlX-03
GI-i4
2. Check the terminals of waterproof connectors from the con-
nector side, as they cannot be accessed from the wire har-
ness side.
Caution l
Use fine wire to prevent damage to the terminal. l
Do not damage the terminal when inserting the
tester lead.
Terminals
Inspection
Pull lightly on individual wires to check that they are secured
in the terminal.
Replacement of terminals
Use the appropriate tools to remove the terminal as shown.
When installing the terminal, be sure to insert it until it locks
securely.
Insert a thin piece of metal from the terminal side of the con-
nector, and then, with the terminal locking tab pressed down,
pull the terminal out from the connector.
< Male >
Same as the female type,
Sensors, Switches, and Relays
Handle sensors, switches, and relays carefully. Do not drop
them or strike them against other parts.
4 I
i c

E
COOLING SYSTEM
1NDEX . ..*....*~.....*..*~~**~=~~.~~.~...~..**.~.....*...~.. E- 2
OUTLINE .................................................. E- 4
OUTLlNE OF CONSTRUCTION.. ................ E- 4
COOLANT FLOW CHART.. ....................... E- 4
SPECIFICATKINS
.................................... E- 5
TWO-STAGE THERMOSTAT.. .................... E- 6
RADIATOR AND COOLING FAN.. .............. E- 7
ELECTRIC COOLING FAN SYSTEM ........... E- 8
SUPPLEMENTAL SERVICE INFORMATION E- 9
THERMOSTAT
.......................................... E- 9
INSPECTION
.......................................... E- 9
ELECTRIC COOLING FAN SYSTEM ............ E-l 0
SYSTEM INSPECTlON
.............................. E-l 0
FAN MOTOR
............................................. E-If
iNSPECTION .......................................... E-l 1
WATER THERMOSWITCH
.......................... E-l I
INSPECTION .......................................... E-f 1
RADIATOR THERMOSWITCH
..................... E-l 2
REMOVAL I INSPECTION I INSTALLATION.. E-12
FAN RELAY .............................................. E-l 3
REMOVAL I tNSPECTlUN .......................... E-l 3
93GOEX-701

INDEX E
BP DOHC TURBO
III 6 No.2 AND No.3 RELAY
1. Thermostat 4. Water thermoswitch
Inspection ...................................
page E- 9 inspection ...................................
page E-l 1
2. Electric cooling fan system 5. Radiator thermoswitch
System
inspection .......................
page E-l 0 Removal I Inspection I
3. Fan motor Instailation .................................
page E-1 2
Inspection ...................................
page E-l 1 6 Fan relay
Removal I Inspection .................. page E-1 3
E-3

E OUTLINE
ELECTRIC COCUNG FAN SYSTEM (BP DOHC TURBO)
System Circuit
I I
WITH A/C
r----‘-- -___- ---------.--------;
ADDITIONAL
FAN
MOTOR
I
II 1 A/C RELAY
RAD1ATdTHERMOSWITCH
ABOVE 105% I221 OF-): ON +IIAGNOSlS
CONNECTOR
WATER
THERMOSWlTCH
ABOVE 97% (207OF): ON
Operation 1. When the coolant temperature exceeds 97OC (207*F), the water thermoswitch turns ON to close the No.7
relay, and connects the + I and -1 terminals of the fan motor
connector. The fan motor turns at low
speed (about 1,660 rpm).
2. When the coolant temperature exceeds 105OC (221 OF), the radiator thermoswitch turns ON, to close the
No.2 and No.3 relays, and connects
the +2 and -2 terminals of the fan motor connector. The fan mo-
tor turns at high speed (about 2,200 rpm).
3. if the vehicle is equipped with air conditioning, the cooling fan motor operates whenever the
NC switch
and the blower switch are on, regardless of
the coolant temperature. Also, when the A/C switch and the blower switch are on, the A/C retay closes
to operate the additional fan
motur.
Note
l The water thermoswitch and the cooling fan reIay are normally-open switches.
Checking cooling fan operation 1. Jump across the TFA and the GND terminals
of the diagnosis connector with a jumper wire.
2. Turn the ignition switch to ON and verify that the cooling fan operates smoothly.
Note
l When the water thermoswitch connector is disconnected, the cooling fan wiif not operate.
E-8

SUPPLEMENTAL SERVICE INFORMAT1ON, THERMOSTAT E
SUPPLEMENTAL SERVICE INFURMATtON
The following points in the section are changed in comparison with Workshop Manual [Europe (1203-l 0-89F),
Australia (I 204-I 0-89f)].
Thermostat (BP DUHC Turbo only)
l Inspection
Electric cooling fan system (BP DOHC Turbo only)
l System inspection
Fan motor
l 1 nspection
Water thermoswitch (BP DOHC Turbo only)
l tnspection
Radiator thermoswitch (BP DOHC Turbo only)
l Removal I Inspection I Installation
Fan relay (BP DOHC Turbo only)
l Removal ! Inspection 93GOEX-710
-
THERMOSTAT (BP DOHC TURBO)
SUB-V E
‘A
/ INSPECTKM
1. Visually check that the thermostat valve is airtight.
2. Place the thermostat and a thermometer in water.
3. Heat the water and check the following:
Initial-opening temperature:
Main: 86.5-89.5% (188--t93°F)
Sub : 83.5-86.5OC (f82--f88QF)
Full-open temperature: 100°C (212°F)
Full-open lift
Main: 8.Umm CU.31 in) min.
Sub : f.5mm (0.06 in) min.
E-9

FAN RELAY E
FAN RELAY(BP DOHCTURBO)
REMOVAL / INSPECTION
1. Disconnect the negative battery cable.
2. Remove the fan relay.
No.2 FAN REUY
w. . . . . . .TYPE 1
@AND @ . . . TYPE 2
INSPECTDN
f . Check continuity as shown with an ohmmeter.
I
Terminal COMlLJlty
A-C No
B-D
Yes 2. Apply 12V between terminals B and D.
Check for continuity between terminals A and C.
3. If not as specified, replace the fan relay.
E-13

-- -
“-
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

lNDEX F2
4x4 CONTROL UNIT
(FUEL PUMP
CONTROL UNIT)
SERVICE, SECTION SEAT
1. Fuel tank
Removal / Inspection I
lnstailation . . . . .._........._._....... 1 . . . . page F2-51
2. Injector _
Volume test ~..........~..~..,...~..~....~. page F2-56
3. Fuel pump resistor/relay [BP TURBO]
System operation . . ._. . . ._. _ . . . . . . . . . . . page F2-56
Inspection . . . . . . . . . . . . . . . . . . . *. . . . . . . . . . . . . page F2-56 4. Fuel pump control unit [BP TURBO]
Inspection *....,...,.........I..... * . . . . . . . page F2-53
Replacement . . . . . . . . . . . . . . . . . . . . . . . . ..-... page F2-53
5. Transfer pump switch
Removal I InstaNation . . . . . . . . . , ..,... page F2-54
Inspection ..a . . . . . . . . . . . . . . . . . . * . . ..I.. e... page F2-54
6. Transfer pump
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page F2-54
Replacement ,...,_..... b . .._._......_.... page F2-54
1. Exhaust system
RemovA I Inspection I InstaNation
BP SOHC . . . . __.._......... _........... page F2-57
BP TURBO _.. . . . . . .._.. . . . . . . . . . . . . . . . page FZ-58
F2-3