1992 MAZDA PROTEGE battery

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
21 RUNS ROUGH ON DECELERATION/BACKFIRE
IESCRIP.
*Engine runs rough while decelerating and abnormal combustion occurs in exhaust system
MON l Transaxle in normal condition TROUBLESHOOTING HINTS]
1) Arr/Fuel mixture too rich
l Arr cleaner element clogged
l Fuel injection control malfunctron
(Fuel cut control)
l Injector fuel leakage
*Throttle sensor (IDL terminal) malfunction
l Dashpot malfunctron
er with ignition switch ON
Check ECU terminal 1F voltage w page F-150
Specification: Battery voltage
(Ignition switch ON)
+ If OK, replace ECU w page F-149 6 If not OK, check wiring between
ECU and Self-Diagnosis Checker
----~
Check for cause (Refer to specified
check sequence) w page F-106
SELECT SW: A Vacuum: More than 450 mmHg (17.7 inHg)
tern components
4 Check if air cleaner element is clean Yes
Go to next step w page F-79
No
Replace air cleaner element
5 Check if ECU terminal voltages are OK
Yes Go to next step
MTX...Especially lN, 2A, 2U and 2V
ATX... Especially lT, 3A, 3U and 3V CT page F-150
No Check for cause c=i‘ page F-151
F-69

22 KNOCKING
DESCRIP- *Abnormal combustion accompanied by audible “pinging” noise
I-ION
[TROUBLESHOOTING HINTS]
3 Incorrect ignition timing (Too advanced)
@ Air/Fuel mixture too lean
3 Carbon deposits in cylinder
*Fuel injection amount not correct
3 Overheating
l Fuel line pressure decreases while accelerating
TEP INSPECTION
ACTION
1 Connect System Selector to diagnosis connector
Yes Go to next step
and set Test Switch to “SELF TEST” and check
for correct ignition timing at idle after warm-up
CT page F-79
Ignition timing (BTDC)
l BP DOHC : go-1 1 o l BP SOHC : 4”-6O
’ B6 No
Adjust a page F-79
2 Check if “00” is displayed on Self-Diagnosis
Yes Go to next step
Checker with ignition switch ON
W page F-62
No
Service Code No. displayed
Check for cause (Refer to specified
check sequence) w page F-63
“88” flashes
Check ECU terminal 1F voltage CT page F-150
Specification: Battery voltage
(Ignition switch ON)
c3 If OK, replace ECU w page F-149
W: SELF TEST c3 If not OK, check wiring between
ECU and Self-Diagnosis Checker
3 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 of intake air sys-
tem components
4
Check for correct engine compression
Yes Go to next step
w page Bl-10
B2-10
Engine compression (Minimum):
l BP DOHC
883 kPa (9.0 kg/cm’, 128 psi)-300 rpm
l BP SOHC
834 kPa (8.5 kg/cm*, 121 psi)300 rpm
l B6
932 kPa (9.5 kg/cm’, 135 psi)300 rpm No High compression
Check engine condition CI page 81-10
62-l 0 l Carbon deposits
F-71

TROUBLESHOOTING GUIDE F
23 FUEL ODOR
DESCRIP-
*Gasoline odor in cabin
TION [TROUBLESHOOTING HINTS]
@ Poor connection or damaged at fuel system or evaporative emission control system
@ Charcoal canister overflow due to evaporative emission control System malfUnCtiOn
Check for cause (Refer to specified Specification: Battery voltage
(Ignltlon switch ON)
c3 If OK, replace ECU r;+ page F-149 c3 If not OK, check wiring between
ECU and Self-Diagnosis Checker
control) with engine running and throttle valve
opened (Neutral switch connector disconnected)
eck if vacuum is felt
s
23UOFX-029
F-73

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
ENGINE TUNE-UP
PREPARATlON
SST
I
I I
49 BO19 9AO
System Selector For
inspection of igni-
tion timing and
idle speed
hA ‘I
03UOFX-04
03UOFX-04
03UOFX-04
NG POINT
03UOFX-04 03UOFX-045
BASIC INSPECTION
Engine Oil
1. Remove the engine oil level gauge and check the engine
oil level and oil condition.
2. Add or change the oil as necessary.
Coolant
Warning
l Never remove the radiator cap while the engine is
hot.
l Wrap a thick cloth around the cap before carefully
removing it.
1. Remove the coolant level gauge from the coolant reservoir.
2. Check that the coolant level is between the L and F marks
of the gauge.
3. Add coolant if necessary.
Battery
1. Check for corrosion on the terminals and for loose cable
connections. If necessary, clean the clamps and tighten
them firmly.
2. Check that the electrolyte level is between the UPPER LEV-
EL and LOWER LEVEL marks.
3. Add distilled water if necessary.
4. Check the specific gravity with a hydrometer.
Gravity: 1.27-l .29 (at 20% [68OF] )

SELF-DIAGNOSIS FUNCTION F
:ODE LOCATION OF
NO.
MALFUNCTION
26 Solenoid valve ON
(purge control)
OFF OUTPUT SIGNAL PATTERN nnnnnll 1 SELF4IAGNOSIS
Open or
short circuit FAIL-SAFE
-
ON
34
ISC valve
OFF u 1 llllJlll r -
41 Solenoid valve ON
(WCS)
[DOHC]
OFF -
Pulse ON No input signal Shifting performed in
55*
i nnnnn
from pulse accordance with signals
generator
OFF generator from vehicle speed
sensor
Open or Solenoid valve(s)
60* 1-2 shift ON
short circuit
solenoid valve
uuuuul performs the shifting with
as little interference as
OFF
possible with driving
performance
2-3 shift ON Lockup not provided
61*
solenoid valve
OFF
UUUI n
3-4 shift ON
62’
solenoid valve
OFF u u u u inn
1.6 sec. 4 sec.
63* Lockup solenoid
valve
u u&m I- Shifting performed
normally
Lockup not provided
0.4 sec.
0.4 sec.
*If the marked code numbers appeor, refer to Section K
Note
l The HOLD indicator does not flash the service code numbers.
l If there is more than one failure present, the code numbers will be indicated in numerical or-
der, lowest number first.
* After repairing a problem, turn the ignition switch OFF and disconnect the negative battery
cable at least 20 seconds to erase the service code numbers from the engine control unit (ECU)
memory.
23UOFX-051
F-85

F SELF-DIAGNOSIS FUNCTION
Troubleshooting
If a service code number is show on the SST, check for the cause by using the chart related to the code
number shown.
r c :ODE No. -
iTEl
I 02 (DISTRIBUTOR Ne-SIGNAL)
INSPECTION I
ACTION
1
1
2
Check if Code No.03 is also present
-5- Check terminal-wire for continuity
4
Check if battery voltage exists at distributor
terminal-wire
-i-- Check terminal-wire between distributor and
ECU terminal 2E (MTX) 2A (ATX) for continuity
and ground
6
Cl$c; ,if$CU terminal 2E (MTX) 2A (ATX) volt- Yes Replace ECU
w page F-149
w page F-152 . No
Go to next step
7
I I
Check if OV or 45V--55V exists at distributor 1 Yes 1 Reolace distributor I
8
- Check distributor circuit for poor connection Yes
1 I Repair or replace connector
I
No SOHC
Go to Step 3
DOHC
Go to next step
Yes Go to next step I
No Go to Step 5
Yes
I I Go to next step
I
No
I I
Repair or replace
Yes Go to next step
No Check for open circuit in wiring from
distributor to main relay (FUEL INJ
relay)
Yes Go to next step
No Repair or replace
terminal-wire (W)
No Go to next step
Check if 4.5V-5.5V exists at ECU terminal 2E
(MTX) 2A (ATX) (With distributor connector dis-
connected) Yes Check for short circuit in wiring from
distributor to ECU
No Replace ECU CT page F-149
.-I 4
F-86