fuel pressure MAZDA 323 1992 Suplement Owner's Manual

TROUSLESHOOTING GUIDE F3
10 ROUGH IDLE/ENGINE STALLS AT IDLE - AmER WARM-UP
DESCRIP- -Engine runs normalty at idle during warm-up but engine stalls or vibrates excessively after warm
TlO#
TROUBLESHOOTING HINTS]
3 Idle-speed control system malfunction
3 Air/Fuel mixture too lean
l Air leakage
*Low fuel line pressure
TEP
INSPECTION
1
ts “00” dlsplayed on Se\-Diagnosis Checker
with ignition switch ON?
SYSTEM SELECT: 1 @ Air/Fuel mixture too rich
l Fuel injection control malfunctlon
(correction for coolant tem$eratuie)
@ Poor ignition
@ Low engine compresslon
ACTION
YES Go to next step
No Service
Code No. displayed
Check for cause (Refer to specified
check sequence)
w page F3-16
“88” flashes Check ECU terminal IF voltage w page F345
Voltage: Battery voltage
(ignition switch ON)
W: SELF TEST e !f UK, replace ECU
w page F3-3 c3 ff not OK, check wiring
(ECU - Self-Diagnosis Checker)
2 Are ECU termrnal voltages OK Yes Go to next step
(especially 20, 20, and 2Q)?
w page F3-45 No
Check for cause
3 Disconnect each high-tension lead at idle; does Yes Go to next step
engine speed decrease equally at each cylinder?
NO Go to Step 9
4 Is intake manifold vacuum correct at idle? Yes Go to next step
Vacuum: More than 450 mmHg f 17.7 InHg )
NO Check for air leakage of intake air sys-
tem components
5 Is air cleaner element clean? Yes Go to next step
No Replace air cleaner element
F3-3 1

F3 TROUBLESHOOTING GUIDE
3TEI ACTION
Is fuel line pressure correct at Idle?
*
Fuel line pressure: 265-314 kPa
12.7-3.2 kgf/cm’, 38-46 psi]
(Two vacuums hose to pressure regulator
disconnected)
304-392 kPa [ 3.1-4.0 kgf/cm’, 44-57 psi 1
(Upper vacuum hose to pressure regulator
disconnected)
INSTALL CLAMPS Yes Go to next step
No Low pressure
Check fuel line pressure while pinching
fuel return hose
4 If pressure quickly Increases,
check pressure regulator
e If pressure gradually Increases,
check for clogging between fuel
pump and pressure regulator
If hose is not clogged, check fuel
pump maxrmum pressure
Connect System Selector to diagnosis connector
and set Test Switch to SELF TEST; is ignition
tlmlng at idle correct after warm-up?
Ignition timing (BTDC): 10 f lo Yes Go to next step
No Adjust tgnrtkon system
8 Dtsconnect water thermosensor connector; does
engine condrtlon Improve? Yes Replace water thermosensor
No
Try known good ECU. does condltlon
Improve?
w page F3-13
Go to next step
Check if injector resistance is OK
w page F3-42 9 Is jqector operating sound heard at Idle?
Yes
No
Resistance: Approx. 2.11 Q
(at 20°C 168*F])
4 If it is, check wlnng
(ECU - Injector)
c3 If it Is not, replace injector
Go to next step IO
Yes Is engine compressron cprrect?
w Section G
No
Engine compression:
1059 kPa 110.8 kgf/cm2, 152 psi)-300 rDm
is strong blue spark vrslble at each disconnected
hrgh-tension lead?’ Check engine
3 Section B2
17
Yes Go to next step
No Check high-tension lead
w Section G
c3 If UK, check distrrbutor cap and
rotor
3 If not OK, replace htgh-tensron lead
Try known good ‘ECU: does condrtron
Improve7
w page F3-3 12 Are spark plugs.OK?
w Section G
l Wear and carbon butld up l Piug gap l Damage Yes
NO
Clean, adjust
13EOi3.334
F3-32.

FUEL SYSTEM F3
13EOF3.34
c I 13EOF3-364 FUEL PUMP CONNECTOR
/
!NSTALL CLAMPS
I
l nspection
1, Disconnect the resistor/relay connector.
2. Ground the fuel pump resistor relay terminal D.
3. Apply battery voltage and check for continuity as shown.
Terminal C
Continuity between A and I3
Battery voltage applied NO
ov Yes
4. Measure the resistance between terminals E and F.
Resistance : 0.38--0.42Q (at 2O*C {6S°F 1)
PRESSURE REGULATOR
Inspection
Fuel line pressure
Warning
l Before performing the following operation, release
the fuel pressure from the fuel system to reduce the
possibility of injury or fire. (Refer to page F3-21.)
1. Disconnect the negative battery terminal.
2. Connect a fuel pressure gauge between the fuel filter and
the fuel main hose. (install clamps as shown.) , .
I
3. Connect the negative battery terminal.
/t.
4, Start the engine and run it at idle.
5. Measure the fuel line pressure.
Fuel line pressure:
206-255 kPa [ 2.1-2.6 kgflcml, 30-37 psi )
6. Disconnect the upper vacuum hose from the pressure regu-
lator and measure the fuel line pressure.
Fuel line pressure:
304-392 kPa (3.1-4.0 kgf/cm2, 44-57 psi )
F3-41

TO TECHNICAL DATA
FUEL AND EMISSION CONTROL SYSTEMS
Item.
Idle speed
tgf-don trrmng-
Fuel pump
MaxImum output pressure
Transfer pump
Maximum output pressure
Fuel filter Engine
rPm
BTDC
kPa [ kgf/cm2, psi 1 1
kPa { kgflcm2, PSI ) 1 BP OUHC turbo
800 f 50
10 l 10
490-736 (5.0-7.5, 71-1 IO]
39 10.4, 5.7 ) or higher
I Type
Low-pressure side Nylon element (in fuel pump)
Hiah-Dressure side PaDer element
Pressure regulator
Regulating low kPa ( kgflcm2, psr 1 265-314 (2.7-3.2, 38-46 1
pressure High kPa { kgflcm2, psr 1 304-392 (3.1-4.0, 44-57 1
lniector
_ Type Low-ohmic
Type of drive
Electromechanical
Resistance q
Approx. 2.11 Q (at 20% ( 68*f )]
lniector reslstor
L - Resistance/injector
Idle-speed control (tSC) valve
TvDe n 1 6 [at 20°C 168OFjj
I Rotarv
Resistance
Solenoid valve (purge control)
Resbstance
Solenoid valve {wastegate)
Resistance n(
R I
i-l I 1 t-13 [at ZO*C {68OF j]
23-27 tat 20°C l68OFll
. r.
33-39 lat 20°C I68OF 11
Solenoid valve (PRC)
Resistance Low temp. q
33-39 [at 2O*C {SS*F]]
High temp. 0 1 33-39 [at 20°C (68OF]]
Water thermosensor
-20°C ( -4OFJ 1 14.6-17.8
Resistance kQ 2o”c I 68OF) 2.21-2.69
40°C ( tO4OF) 1.0-l 3
80°C I176OFJ 0.29-0.35
Airflow meter
Resistance R E244Vs
E2*Vc Fuity closed
Fully open I 20-600
20- 1,000
200-400
EP++THAA
(intake air
thermosensor) -2O*C ( -4OFj 1 13,600-l 8,400
20% 1 68OF) 1 2,210-2,690
6O*C 114OOFl i 493-667
EI ~Fc
I Fully closed 00
0 1
Oxygen sensor (ceramic beater coil)
Resistance
Fuel tank Approx. 6 [at 20°C f68OF)]
I CaDacW L I US oal. ImD aal I I 60 I 15.9, 13.2 I
I
Air cleaner
Element type
Fuel
Specrficatioir Oil permeated
Unteaded premium (RON 95 or higher)
l TEN terminal of diagnosis connector grounded. .
-
ENGINE ELI
3attery
I
Dark current’
Alternator
Starter
Distributor qr
Ignition timin?
ffEN terminal
Ignition coil
Spark plug
l ’ Dark current
r2 Standard pl

TD TECHNlCAt DATA -
BODY EtECTRtCAL SYSTEM
ttem
Headlight
Front fog light
Front turn signat light
Parking light
Front side turn light
StocYlailliaht Specifications (w)
ECE
I Swiss
60155
55
21
5
5
2115
Exterior tamps
Taillight &8) 5
Rear turn single tight 21
Back-up light
21
License plate light
5
Flash-to-pass light 55 (Austrra)
I -
Running Ilght
55 (Sweden, Norway, Iceland)
Rear fog light 21
Interior and spot lamp Interior 10
Spot 6
Interior Iamps
Interior lamp 10
Spot tamp (in overhead console) 8
Cargo compartment lamp
5
High beam
3.4
Turn light
3.4
Brake 3
Hold 3
Charge 3
011 pressure 3 -.
lndcator and n Washer 3
warning Iamps TUF~O 3
Fuel
1 3
Rear fog
I
! 3
1
ABS
Parktng brake
Illumination I 3
3 .
3.4
Rear
Cliff. lock f 3
3 I STANDARD BOLT AND NUT TIGHTENING TORQUE
! Diameter Pkh I 41
8T f&lb N-m I 81 mm {tn] mm fin] N-m 1 m-kg
dsf Wtb 1 Nm
mkg ft4b 6 IO.2361 1 {0.039] 4.2-6.2 /0.43-O-63 3.1-4.6
6.9-9.8 0.7-1.0 5.0-7.2 7.8-11.8 O-8-1.2 5.8-8.8
8 IO.3151 1.25 (0.049) 9.8-14.7 1 1.0-1.5 7.2-10.8 16-23 1 1.6-2.3 12-17 18-26 1.8-2.7 13-20
10 IO.3941
It.25 10.04911 20-28 1 2.0-2.9 1 14-21 31-46 1 3.2-4.7
23-34 36-54 3.7-5.5 27-40
I r
12 IO.4721
1.5 lO.OSSj 34-50 3.5-5-l 25-37 1 55-80
5.6-8.2 41-59 63-93 6.4-9.5 46-69
14 {0.551] 1.5 IO.059) - - - 75-103 7.7-10.5 56-76 102-137 lo-14 75-101
16 #0.630] 1.5 {O.OSSl - -
- f16-157 12-16 85-116 156-211 16-22 115-156
t8 (0.709) 1.5 [0.059] - - - 167-225 17-23
123-166 221-299 23-31 163-221
20 IO.7871 I,5 {0.059]
- - - 231-314 24-32 171-231 308-417 31-43
227-307
22 (0.866) 1.5 IO.0591
- 1 - - 334-423 32-43 231-312 417-564 43-58
' 307-416
24 10.945) 1.5 10.059) - 1
- - 1475-5461 41-56 298-403 1536-7261 55-74
396-536
c)
c) I
-.
c’
c .
4

Reading Wiring Diagrams
Loaic symbols I
ypes of logic symbols Operation Expressing output Simple relay circuits
OR
Input to A or 8 will Low electricai potential (L) at A and B +
produce output at C. no output (L) at C
A
6
D- High electrical potential (H) at A or B +
C output (H) at C
AND Input to A and B will High electrical potential (H) at A and B +
produce output at C. output(H) at C
q---J-c
Low electrical potential (L) at A or B + A
no output (L) at C
B a-00-a C
6
INV No input to A will produce Low electrical potential (L) at A -+
an output at B. no ground (H) B
An input to A will not High electrical potential (H) at A +
A- 6 produce an output at B. grounds (L) B A- 6
PROCESS Simplified representation of complex functions within circuit describes
main function. (Examples)
---
--I- 1 1. Igniters
I
-L-l Signal detector for engine control unit, cooling unit, and tachometer.
Ii- 2. r”~“-‘-‘-““‘~~‘.“’
Sbnsl conwflw :
i...-..--.---......-.~~
Signal converter for turn and hazard flasher unit and igniter unit.
Abbreviations used in this booklet
A
AAS
ABS
ACC
ACCEL
ACV
ADD
AE
AIS
ALL
ALT
EP
ANT
EV
EP
ATX
A/C
AIF
AIR
:AC
B/L
CARB
CCT
CIGAR
COMBI
CON
CONT
CPU
CSD
DEF
DOHC
ECPS Ampere
Autoadjusting Suspension
Antilock Brake System
Accessory
Accelerator
Air Control Valve
Additional
Acoustic Equilibration
Air Injection System
Automatic Load Leveling
Alternator
Amplitude Modulation
Amplifier
Antenna
Autostop
Alr Supply Valve
Automatic transmission
Atmospheric Pressure
Automatic Transaxle
Air Conditioner
Air Fuel
Auto Reverse
Battery
Bypass Air Control Valve
Bilevel
$rr$:,tor
Cigarette
Combination
Conditioner
Control
Central Procassino Unit
&Id-Start Device -
Defroster
Double-Overhead Camshaft
Electronically Controlled Power
Steering ECU
EGI
EGR
ELEC
ELR
ETR
EXH
E
FICB
FM
F/S
F/I
GEN
ET
HI
H/D
I;LUMl
INT
ISC
JB
LCD
LF
k!
z Engine Control Unit
Electronic Gasoline Injection
Exhaust Gas Recirculation
Electrio
Emergency Locking Retractor
Electronic Tuner
Exhaust
Front
Fast-Idle Cam Breaker
Frequency Modulation
Feedback
Fuel lniector
Generator
Heater
High-Energy Ignition
High
Heater/Defroster
Ignition
lllumlnation
Idle-Speed Control
Joint Box
Liquid Crystal Display
Left Front
Left Hand
Low
Left Rear
Low Wave
:I, Motor
Middle
MIL
MIN Malfunction Indicator Lamp
Minute
MIX
Mixture
MPX Multiplex
ZR Manual Transmission
MTX Mechanical Tuning Radio
Manual .Transaxie PRG
PTC
P/S ass
kc
FIF
. . .
RH
RPM
!2EL
SQ
ST
SW
TCV
TEMP
TICS
TR
TWS
V
VENT
VOL
VRIS
W Middle Wave
Normally Closed
Normally Open
Overdrive
Switch Off
Switch On
Power
Pressure Regulator Control
Solenoid Valve
Purge Solenoid Valve
Positive Temperature Coefficient
Heater
Power Steering
;im&k-Start System
Recirculation
Right Front
Right Hand
Revolutions Per Minute
Right Rear
Solenoid
Squares Per Milimeter
Start
Switch
Twin Scroll Turbocharger
Solenoid Valve
Temperature
Triple Induction Control System
Transistor
Total Wiring System
Volt
Ventilation
Volume
Variable Resonance Induction
System
Watt(s)
IO

1B 0 Main relay
(FUEL INJ r&y)
Ignition switch
(STARI)
1D 0 Self-Diagnosis
Checker
(monitor lamp)
I IJ 0 A/C relay
Ignition switch ON
vs
NC switch ON at idle
6&w 2 54
NC swtch OFF at Idle VB
-
‘“‘~~
System Selector test switch at
I I I
I I I 1L - - - -
- -
IM 1 - 1 - -
I - -
- 1T ThrorUe SW&X
(ii switch)
Foghghl relay
P/S pressure
switch
A/C switch
Electric coding fan
swlch
Blower control
swtch
Rear wlndow
defroster swtch
Neutral/Clutch
switches Tesl condnton
Accelerator pedal released
Accderator pedal depressed -*
B&low l.OV
Vi3
Togllghtsmtcll
Foglight switch OFF
lanitton switch ON V0
OY
VR .-
P/S pressure switch ON at tdle
P/S pressure swtch OFF at I& 6&w 1 .ov
Ye
Fan operatbng (coolant temperature over
97OC I207OF ) or diagnosis connector
Blower control switch OFF or 1st posttion
E~iower conlroi svntch 2nd or higher po-
Rear wndow defroster OFF
Rear wndow defroster ON ~~
Neutral pcsitw or clutch pedal
rlr-n -
Ignition swrlch
ON and biowtr
motor ON -
Ignition switch
ON
Ignition switch
ON
34

PARTS INDEX
PARTS NAME PAGE
PARTS NAME PAGE
I KNOCK CONTROL UNIT...................30
KNOCK SENSOR.........................30 .82
.82
.82
.82
.82
.32
.26
.72
a LICENSE PLATE LIGHT...............48.5 0
B MAIN RELAY(FUEL INJ)
............... ..2 8
1 NEUTRAL SWITCH.......................3 2
$3 OIL PRESSURE SWITCH..................3 8
OXYGEN SENSOR........................2 8
J PANEL LIGHT CONTROL..................7 0
PARKING BRAKE SWITCH.................3 8
POSITION LIGHT....................44,5 0
POWER DDOR LOCK SWITCH...............7 6
POWER DDOR LOCK TIMER UNIT...........7 6
POWER DOOR LOCK ACTUATOR.............7 6
POWER OUTSIDE MIRROR MOTOR...........7 0
POWER OUTSIDE MIRROR SWITCH..........7 8
POWER STEERING PRESSURE SWITCH.......3 2
POWER WINDOW MAIN SWITCH.............7 4
POWER WINDOW MOTOR...................7 4
e
1 BACK-UP LIGHT SWITCH.................60
BACK-UP LIGHT....
BLOWER MOTOR.....:::::::::::::::::::’
.E
BLOWER SWITCH........................62
BRAKE FLUID SWITCH...................38
POWER WINDOW SWITCH..................74
J D REAR FOG LIGHT RELAY.
REAR FOG LIGHT SWITCH
REAR FOG LIGHT.......
REAR SPEAKER......... ................
................ zz
................
52
................
................ E
................ 42
............... .
..: 2
.Riik+‘::::::::..6 4
SWITCH.........6 4
................
................ :z
................ 62
............. 44, 48
I CIGARETTE LIGHTER..
CIRCUIT OPENING REL
CLUTCH SWITCH...
COMBINATION SWITCH:
CONDENSER.......
COOLING FAN MOTOR::
COOLING FAN RELAY..
COURTESY LAMP.....,
CPU................ . .64
/ii’::::::::::::::..2 8
..................
... 44, 46, 48, 50, 52, %
..................
.................. 2:
..................
.................. 2:
............... 42, 66
B DIAGNOSIS CONNECTOR.....
DIGITAL CLOCK...........
n-rnnc ............
............ E
............
............ %
............
............ ZE
TURN LIGHT....
WASHER MOTOR.. REAR
REAR
REAR
REAR
REAR
REAR
REAR
REAR
-ih .ER
-ER
RESISTOR ASSEMBLY..
RUNNING LIGHT RELAY
il SEAT WARMER...........
SEAT WARMER REALY.....
SEAT WARMER SWITCH....
SHORT CONNECTOR.......
SLIDING SUNROOF MOTOR.
SLIDING SUNROOF RELAY.
SLIDING SUNROOF SWITCH
SLIDING SUNROOF.......
SOLENOID RESISTOR.....
SOLENOID VALVES
PRC HIGH TEMP........
PRC LOW TEMP.........
PURGE CONTROL........
WASTEGATE............
SPEED SENSOR..........
SPOT LAMP.............
STARTER...............
STOPLIGHT CHECKER..... ........
........
........
........
........
........
........
........
........ ....... 84
.......
....... ::
.......
.... 66.2
.......
.... 66, Ei
.......
....... ........
........
........
........
........
........
........
........
........
........
.
. . . . . . z:
. . .
. . . . zoo
. 1 .
. . . . E
. . . .
56, ::
. . 56, 58
. . 56, 58
“J.“LJL................. DISTRIBUTOR ............
DOOR SPEAKER ........... .
DOOR SWITCH........: .... 8
3 ENGINE CONTROL UNIT............ ,28, 30. 32
3 FLASHER UNIT...
FRONT FOG LIGHT
FRONT FOG LIGHT
FRONT FOG LIGHT
FRONT SIDE TURN
FRONT TURN LIGH
FUEL METER.....
FUEL PUMP REALY
FUEL PUMP UNIT.
FUEL PUMP......
-. -- ............
............ 22 .
. . RiiA‘i 1
SWITCH
i&ii 1 ............ 52
............ .
............ 22
.....................
..................... %
.....................
..................... %
..................... 28 -
tust ....................
B
G SENSOR ................
13 HAZARD SWITCH............
HEADLIGHT CLEANER MOTOR..
HEADLIGHT CLEANER SWITCH.
HEADLIGHT LEVELING ACTUAT
HEADLIGHT LEVELING SWITCH
HEADLIGHT RELAY..........
ENI- IGHT. . . . . .
HORN RELAY...............
HORN SWITCH.............. ...
40, 46, 52, 64
: ........... 82
............ 54
........... .
..: ii
&::::::::..4 6
HORN..................I 1
HYDRAULIC UNIT ..........
01 IC REGURATOR ............
IG KEY CYLINDER LAMP ....
IGNITER .................
IGNITION COIL ...........
ILLUMINATION LAMP .......
AUDIO SYSTEM ...........
BLOWER SWITCH .......... ............
46
............ 44
......... 44, 46
............
............ E
............
............ E
...........
........... 2:
...........
........... 2
...........
........... 5:
...........
........... 5:
...........
........... 5::
...........
........... 5:
..........
.%
;ci:::::::.;;
........... CIGARETTE LIGHTER: ;.I:;::
FRONT FOG LIGHT SWITCH...
HAZARD SWITCH...........
HEADLIGHT CLEANER SWITCH:
HEADLIGHT LEVELING SWITCH
INSTRUMENT CLUSTER.......
REAR FOG LIGHT SWITCH....
REAR WINDOW DEFROSTER SW1
SEAT WARMER SWITCH.......
INDICATOR LAMP...........
...........
........... 33:: ...........
30 STOPLIGHT SWITCH ......
STOPLIGHT .............
0 TAChOMETER...........................3 8
TAILLIGHT.........................48,5 0
TEMP METER...........................3 8
THROTTLE SENSOR......................3 2
TRANSFER PUMP........................2 8
TRUNK COMPARTMENT LAMP SWITCH........6 8
TRUNK COMPARTMENT LAMP...............6 8
TURN SWITCH..........................5 4
q WARNING LAMP.........................3 8
WASHER LEVEL SENSOR..................3 8
WATER THERMOSENSOR................30,3 8
WATER THERMOSWITCH................... 6
WINDSHIELD WASHER MOTOR..............4 0
WINDSHIELD WASHER SWITCH.............4 0
WINDSHIELD WIPER MOTOR...............4 0
WINDSHIELD WIPER SWITCH..............4 0 INJECTOR..........:;.:::::
INJECTOR RESISTOR .........
INSTRUMENT CLUSTER .....
INTERIOR LAMP..........:::
ISC VALVE .................
. . . . . , . . . . .
. . . . . . . . . . . iz:
,..........
30