1992 MAZDA PROTEGE brake

OUTLINE F
SPECIFICATIONS
Item
Idle speed*1 *2
Ignition timing*2
Fuel pump
Maximum outout Dressure Engine
rpm B6 SOHC
6O--80 BTDC 1
kPa (ka/cm’. osi1 1 BP SOHC
700-800
4O---6O BP DOHC
90-l 1 O
441-637 (4.5-6.5. 64-92) I
I Fuel filter I
Type Low-pressure side Nylon element (in fuel pump)
High-pressure side Paper element
Pressure reaulator
Regulating pressure kPa (kg/cm’, psi) 1 265-314 (2.7-3.2, 38-46)
I lniector I
Type Type of drive
Resistance
Idle speed control (ISC) valve
TvDe , ,
t Resistance
Purge control solenoid valve
Resistance
Water thermosensor n High-ohmic
Electromechanical
12-16
Rotarv
n I II-13 I
n 1 23-27
1 -20% I -4OFj 1 14.6-17.8
Resistance k62 2ooc i 68OF) 2.21-2.69
40°C (104OF) 1.0-l .3
80°C (176OF) 0.29-0.35
Airflow meter
E2++Vs
E2-Vc Fully closed
Fully open 20-600
20-l ,000
200-400
Capacity liters (US gal, Imp gal) 1 Hatchback 50 (13.2, ll.O), PROTEGE ,... 55 (14.5, 12.1)
I Air cleaner I
Element type
Fuel
Specification l
l Wlth parking brake applied (Canada)
‘2 TEN terminal of diagnosis connector grounded Oil permeated
Unleaded regular (RON 91 or higher) 23UOFX-012
F-l 5

TROUBLESHOOTING GUIDE F
12 ROUGH IDLE/ENGINE STALLS JUST AFTER STARTING
DESCRIP-
*Engine starts normally but vibrates excessively or stalls just after starting (acceleration from idle) TION
*Idle conditions are normal in the other conditions [TROUBLESHOOTING HINTS]
@ Fuel injection control system or idle speed control sys-
@ Idle speed misadjustment
tern malfunction @ Ignition timing misadjustment
*Start signal not input to ECU iTEl
-s-- 3
4
5 INSPECTION
-T- ACTION
Check if “00” is displayed on Self-Diagnosis
Checker with ignition switch ON w page F-82
SYSTEM,SELECT: I
r -SELECT SW: A
Check if ECU terminal voltages are OK
MTX...Especially 1 N
ATX... Especially 1T w page F-150
Connect System Selector to diagnosis connector
and set Test Switch to “SELF TEST” and check
for correct ignition timing at idle after warm-up w page F-78
Ignition timing (BTDC)
l BP DOHC : 9”-11 o l BP SOHC : 4O--6O
l B8 : 60-80
Check continuity between throttle sensor termi-
nals IDL and E CT page F-159
MTX
Clearance between throttle
lever and stopper
MTX O.lmm (0.004 in)
1 .Omm (0.039 in)
ATX 0.1 mm (0.004 in)
0.6mm (0.024 in) Continuity
Yes
No
Yes
No
Try known good ECU and check if condition
mproves w page F-149 Yes
No
Yes
Go to next step No
Check for cause Yes
In same condition as Step 3 inspection
and apply parking brake
Check for correct idle speed w page F-80
Idle speed: 700-800 rpm
No
Adjust Yes
Go to next step No
Adjust Go to next step Service Code No. displayed
Check for cause (Refer to specified
check sequence) w page F-83
“88” flashes
Check ECU terminal IF voltage w page F-150
Specification: Battery voltage
(Ignition switch ON)
d If OK, replace ECU w page F-149
* If not OK, check wiring between
ECU and Self-Diagnosis Checker c7 page F-151
3 If OK, go to next step
3 If not OK, adjust idle speed w page F-80
w page F-79
w page F-159
F-49

TROUBLESHOOTING GUIDE F
9 LACK OF POWER
_-- --
L L -
ESCRIP- *Performance poor under load when throttle valve wide open
ION *Reduced maximum speed
* Idle condition normal
VtOUBLESHOOTlNG HINTS]
) Factors other than engine malfunction
*Clutch slipping
* ATX slipping
l Brake dragging l Low tire pressure
l Incorrect We size l Overloaded
‘, Low intake air amount @ Air/Fuel mixture too lean
l Fuel line pressure decreases l Fuel injection malfunction
@ Poor ignition
@ Low engine compression
@ Alcohol blended fuel used
l Throttle valve not open fully
*Clogged intake air system
l Low tire pressure CY Section H
CY Section K
cz7 Section P
c7 Section Q
w page F-l 14
CT= page F-l 12
Checker with ignition switch ON
w page F-83
rminal 1F voltage CT page F-150
Specification: Battery voltage
(Ignition switch ON)
* If OK, replace ECU w page F-149
c3 If not OK, check wiring between
ECU and Self-Diagnosis Checker
Ignition timing (BTDC)
l BP DOHC : 9*-l lo l BP SOHC
: 4O-8O 4 If advances, go to next step
* If not advance, check ECU terminal
w page F-150
F-61

TROUBLESHOOTING GUIDE F
20 POOR ACCELERATION
DESCRIP- l Performance poor while accelerating
TION l idle condition normal [TROUBLESHOOTING HINTS)
3 Factors other than engine malfunction @ Air/Fuel mixture too lean
*Clutch slipping l Fuel line pressure decreases l ATX slipping l Fuel injection malfunction
l Brake dragging @ Poor ignition l Low tire pressure
@ Low engine compression
l Incorrect tire size @ Alcohol blended fuel used l Over-loaded
3 Low intake arr amount
*Throttle valve not open fully
*Clogging in intake air system
Check factors other than engine CT Section H
c7 Section
P
ing accelerator fully w page F-l 14
w page F-l 12
Checker with ignition switch ON w page F-83
rminal 1 F voltage w page F-150
Specification: Battery voltage
(Ignition switch ON)
W: SELF TEST c3 If OK, replace ECU w page F-149 r;3 If not OK, check wiring between
ECU and Self-Diagnosis Checker
Clearance between throttle
lever and stopper
0.1 mm (0.004 in)
l.Omm (0.039 in)
O.lmm (0.004 in)
0.6mm (0.024 in)

TROUBLESHOOTING GUIDE F
26 POOR FUEL ECONOMY
DESCRIP-
l Fuel economy unsatisfactory TION
[TROUBLESHOOTING HINTS]
While fuel consumption is drastically increased by city driving, short-run operation, stop and go driving, extended winter
warm-up periods, etc., as opposed to “trip” mileage, an attempt should be made to determine these factors when con-
fronted with “poor mileage” conditions. However, since the operator is not always at fault, the following is offered.
@II Operator depressing accelerator more than usual due to
@ Air/Fuel mixture too rich
low engine power
l Poor ignition *High fuel line pressure
@ Alcohol blended fuel used
*Low intake air amount
l Electronic spark advance control system malfunction @ High vehicle load l Low tire pressure
*Clutch slipping/ATX slipping l Incorrect tire size l Exhaust component restricted l Brake dragging ;TEP
INSPECTION ACTION
1
Check factors other than engine Yes
Go to next step
l Low tire pressure = Section Q 9 Unrecommended tire srze v Section Q l Clutch slipping w Section H l Brake dragging No
0 Section P Repair
l Exhaust component restricted cz= page F-136
2
Check if air hoses are connected correctly - Yes
Go to next step CI page F-109
No
Repair 3
Check if “00” IS displayed on Self-Diagnosis
Yes
Checker with ignition switch ON Go to next step W page F-82 No
SYSTEM SELECT: 1 Service Code No. displayed Check for cause (Refer to specified
check sequence) w page F-63
“88” flashes
Check ECU terminal 1F voltage w page F-150
Specification: Battery voltage
(Ignition switch ON)
* If OK, replace ECU CT= page F-149 e If not OK, check wiring between
ECU and Self-Diagnosis Checker 4
Check for correct intake manifold vacuum at idle
Yes Go to next step Vacuum: More than 450 mmHg (17.7 inHg) No
Check for air leakage at intake air sys-
tem components 5
Check if air cleaner element is clean Yes
Go to next step CT= page F-79
No
Replace air cleaner element
F-75

F ENGINE TUNE-UP
23UOFX-046 Note
l When the parking brake is not applied, the idle
speed for ATX model (Canada) is approx. 800 rpm. Idle Speed
1. Perform “Preparation”. (Refer to page F-79.)
2. Apply parking brake.
3. Check that the idle speed is within specification.
Idle speed (Neutral or P range): 700-800 rpm
Caution
l Check the idle speed without the electric cooling
fan operating.
4. If not within the specification, adjust the idle by turning the
air adjusting screw.
5. Disconnect the SST.
F-80

SELF-DIAGNOSIS FUNCTION
Throttle sensor
Depress accelerator pedal (not fully) and check that
monitor lamp illuminates
YES NO
PC: *Throttle sensor malfunction CT page F-169
*Short circuit in wire harness
from throttle sensor to ECU
*ECU terminal 1 N (MTX) 1T
(ATX) voltage incorrect CT page F-150
l ECU malfunction
Depress acceleration pedal fully and check that monitor
No : PC: *Throttle sensor malfunction w page F-169
lamp does not illuminate *Open circuit in wire harness
from throttle sensor to ECU
YES *ECU terminal 2L (MTX) or 21
(ATX) voltage incorrect a page F-154
Throttle sensor OK
Release accelerator pedal
23UOFX-090
Stoplight switch
Depress brake pedal
Check that monitor lamp illuminates
YES
Stoplight switch OK
Release brake pedal NO
PC: *Stoplight switch malfunction w Section T
*Open circuit in wire harness
1
from stoplight switch to ECU
*ECU terminal 10 (MTX) 1Q
(ATX) voltage incorrect CT page F-l 52
l ECU malfunction
23UOFX-091
Blower switch
---
Turn blower switch to 2nd or higher position
Check that monitor lamp illuminates
YES
Blower switch OK NO
__L PC: *Blower switch malfunction
*Open circuit in wire harness
from blower switch to ECU
l ECU terminal 1 S (MTX) 1 P
(ATX) voltage incorrect
l ECU malfunction p Section T
w page F-152
23UOFX-092
F-l 08

CONTROL SYSTEM
Terminal voltage (MTX)
VB: Battery voltage
wminal Input Output Connection to Test condition Correct voltage Remark
1A - - Battery Constant VB For backup
1B 0 Main relay OFF OV
(FUEL INJ relay) Ignition switch ._-
ON VB
1c 0 Ignition switch While cranking Approx. 10V
(START) -
Ignition switch ON ov
10 0 Self-Diagnosis Test switch at “SELF-TEST” With Self-
Checker Lamp illuminated for 3 sec. after ignition 4.5--5.5v Diagnosis Check-
(Monitor lamp) switch OFF+ON er and System
Lamp not illuminated after 3 sec. VEI Selector
Test switch at “02 MONITOR” at idle
Monitor lamp illuminated 4.5-5.5v
Test switch at
“02 MONITOR” at idle
Monitor lamp not illuminated Va
1E 0 Malfunction indica- Lamp illuminated for 3 sec. after ignition
Below 2.5V With System
tor lamp (MIL) switch OFF-ON Selector test
Lamp not illuminated after 3 sec.
VB switch at
“SELF-TEST”
Lamp illuminated Below 2.5V
Lamp not illuminated VR
1F
0 Self-Diagnosis Buzzer sounded for 3 sec. after ignition
Below 2.5V
l With Self-
Checker switch OFF+ON Diagnosis
(Code Number)
Buzzer not sounded after 3 sec. VE - Checker and
Buzzer sounded Below 2.5V System Selector
l With System
Buzzer not sounded
VB Selector test
switch at
“SELF-TEST”
1G 0 Igniter Ignition switch ON ov
-
Idle Approx. 0.2V
1H - - - - - -
_-
II - - - - - -
1J
0 AIC relay Ignition switch ON
VB
A/C switch ON at idle Below 2.5V
A/C switch OFF at idle VB
-
1K 0 Diagnosis
connector
(TEN terminal) System Selector test switch at
“02 MONITOR”
System Selector test switch at
“SELF-TEST” VB
ov Ignition switch
ON
1L 0 DRL relay
(Canada) Parking brake pulled with ignition switch
Ve
l DRL.: Daytime
ON (DRL OFF) Running Lights
Idle (DRL ON) Below 2.5V
V’
F-l 50