1990 MAZDA 232 warning

F2 FUELSYSTEM
Note
l Drain the fuei from the fuel tank before removing the tank.
1. Fuel pump cover
2. FueI pump connector
3. Fuel hoses
Installation Note ..___........_.....__......_...._. below
4. Exhaust pipe
Removal / installation . . . . . . . .__._. . , . . . FZ-57, 58
5. Propeller shaft
Removal ! Installation .._._...._....._.._.. Section L 6. Fuel filier hose, breather hose, and
evaporation hoses
tnstal!ation Note ..m..,* . . . . ...*-. *..,- . . . . m...-e.. below
7. Fuel tank straps
8. Fuel tank
Inspect for cracks and corrosion
93GOF2-772
0 FUEL FILLER HOSE
03UOFX- 13! installation Nate
1. Push the ends of the main fuel hose, fuel return hose, and
evaporative hoses onto the fuel tank fittings at least 25mm
(1 .O in).
2. Push the fuel filler hose onto the fuel tank pipe and filler pipe
at least 35mm (1.4 in).
TRANSFER PUMP CONTROL SYSTEM
System Operation
I. Turn the ignition switch ON and verify that the fuel gauge
indicates more than half and that the transfer pump oper-
ating sound is heard.
Warning
l If the fuel level is less than one half, this inspec-
tion cannot be performed.
2. Ground the transfer pump connector terminai-wire (Y/L) with
a jumper wire and verify that the transfer pump stops.
3. Remove the jumper wire and verify that the transfer pump
begins operation after approx. IO sec.
4. If not as specified, check the following parts.
l Fuel pump control unit. [BP turboJ
(Refer to page F2-53.)
4x4 control unit [BP SOHC] (Refer to page Fl-12.)
l Transfer pump. (Refer to page F2-54.)
. Transfer pump switch. (Refer to page F2-54.)
93GOF2-774
F2-52

F2 FUELSYSTEM -.
03UOFX-82: 93GOF2-777
2
r
TRANSFER PUMP SWlTCH
Removal I Installation
1. Refer to replacement of the transfer pump.
(Refer to below.)
Inspection
1. Check continuity between transfer pump connector termi-
nal C and ground terminal.
r Float Dosition I Comnuity
I
I Down I Yes
I
2. If not as specified, reptace the transfer pump switch.
TRANSFER PUMP
Inspection
1. Remove the rear seat cushion.
03UOFX-823 2. Disconnect the transfer pump connector.
3. Check for continuity between transfer pump connector
terminal-wires (ES) and (t/V).
4. If no continuity exists, replace the transfer pump.
03UOFX-825
F2-54
Replacement
Warning
l When servicing the fuel system, keep sparks,
cigarettes, and open flames away from the fuel.
1. Remove the rear seat cushion.

F2 FUEL SYSTEM
93GOF2-775
1 93GOF2-78(
93GOF2-78:
1
93GOF2-78;
-
93GOF2-783
FUEL PUMP RESISTOR/RELAY
System Operation
I. Remove the rear seat cushion.
2,
Measure the voltage at the fuel pump connector terminal
A {G/O).
Voltage
r Crankinq Approx. 12V
I
I- Others t ACKXOX. I OV i
3. If not within specification, perform the following inspection,
and repair or replace if necessary.
l Fuel pump resistor/relay resistance. (Refer to below.)
l ECU II terminal voltage. (Refer to page F2-60.)
l Wiring harness and connector.
inspection
1.. Disconnect the connector.
2. Ground the fuel pump resister relay terminal D.
3. Apply 12V to terminal C and check for continuity between
terminals A and B.
Terminal C
12 applied
ov Continutty between A and B
NO
Yes
4. Measure the resistance between terminals E and F.
Resistance : 0.62-0.66Q [at 20% (68OF)l
INJECTOR
Volume Test
1. Remove the injectors with the delivery pipe.
2. Affix the injectors to the delivery pipe with wire.
Caution
l Affix the injectors firmly to the delivery pipe so that
no movement of the-injectors is possible.
Warning
l Be extremely careful when working with fuel.
Always work away from sparks or open flames.
3. Connect the SST to the battery and injector.
4. Check the injection volume with a graduated container.
Injection volume:
BP SUHC....44-47 cc (2.68-2.87 cu in)/15 sec.
BP Turbo
. ...87-105 cc (5.31 -6.41 cu in)/15 sec.
Caution
l When using the SST, make sure of the SST num-
ber and use correct one.
5. If nut correct, replace the injector(s).

F2 CONTROLSYSTEM
Terminal I Input Output Connected to Test condition Correct voltage Remark
25 0
Overboost warning lgnltion switch ON Approx. 12V
-
buzzer
2T 0 1 Solenoid valve 180 seconds atter engine started when Below 1 SV
(Pressure regulator) engine coolant temperature above 90%
(I 94OF) and Intake air temperature above -
58OC (13WF)
1 Other condition at Idle Approx. 12V
2u 0 Injector (Nos. I 1 3) Ignrtion switch ON Approx. 12V * Engine Signal
Idle Approx. 12V’ Monitor: Green
and red lamps
Engrne speed above 2,000 rpm on de- Approx. f2V
flash
celeratlon (Atter warm-up)
2v 0 Injector (Nos. 2, 4) lgnitlon swrtch ON Approx. 12V
Idle Approx. 12V’
Engine speed above 2,000 rpm on de- Approx. 12V
ceieration (After warm-up)
2W 0
ISC valve Ignition switch ON Approx. 7V
-
Idle Approx. 9V
2x 0 Solenoid valve Ignition switch ON Approx. 12V
(Purge control)
t Idle -
Approx. f2V
t
2Y 0 Cmxit opening Ignition switch UN Approx. 12V
-
relay
Idle Below 1 .OV
22 - - - - - -
-L J
u-
v I U-1 l-
2y 2w 2u 2s 20 20 2M 2K 21 2G 2E 2C
2A 1U 1S IQ 10 1M 1K 11 1G 1E IC 1A
22 2X 2V 2T 2R 2P 2N 2L 2.J i’t-( 2F 2D 2B 1V 1T 1R tP IN IL I..! ItI IF
tD 18
F2-66