check engine MAZDA PROTEGE 1992 Workshop Manual

CONTROL SYSTEM F
23UOFX-151
WASHER,
REPLACE
9MUOF2-24
05UOFX-25

9MUOF2-24
NEUTRAL SWITCH (MTX)
Inspection
1. Disconnect the neutral switch connector.
2. Connect an ohmmeter to the switch.
3. Check continuity of the switch.
Transmission Continuity
Neutral Yes
Other ranges No
4. If not as specified, replace the neutral switch.
Replacement
Replace the neutral switch as shown in the figure.
POWER STEERING PRESSURE SWITCH
Inspection
1. Disconnect the P/S pressure switch connector.
2. Connect an ohmmeter to the switch.
3. Start the engine and let it idle. Check continuity of the switch
while turning the steering wheel.
P/S
Turning
Not turning Continuity
Yes
No
4. If not as specified, replace the P/S pressure switch.
Replacement
Replace the P/S pressure switch as shown in the figure.
F-l 73

TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
DIAGNOSTIC INDEX
No. Troubleshooting items
Page
1
Will not crank-starter motor does not operate G-4
2
Will not crank-starter motor spins G-4
3
Cranks slowly G-5 4
Alternator warning lamp illuminates when engine running
G-5
5 Discharged battery G-5
6
Misfire
G-5
03UOGX-004
SYMPTOM TROUBLESHOOTING -
1
iTEl
1
2
3 Will not crank-Starter motor does not operate
INSPECTION
T
Check if engine cranks with fully charged battery
Check if battery voltage is applied at B terminal
TERMINAL
battery voltaae is aoolied at S terminal
when clutch pedal depressed (MTX) and ignition
switch in START position
S TERMINAL
Yes
No
Yes ACTION Check charging system CT- page G-7
Go to next step
Go to next step
No Check wire harness
Yes
l Check magnetic switch l Check field coil l Check armature
No
l Check starter interlock switch (MTX) ccp: page G-31 l Check inhibitor switch (ATX) c=p Section K l Check ignition switch CI Section T l Check wire harness
1 L-T page G-28
CT- page G-29
CT- page G-29
23UOGX.001
03UOGX-006
G-4

TROUBLESHOOTING GUIDE G
3 Cranks slowly
STEP INSPECTION ACTION
1 Check if engine cranks normally with fully Yes Check charging system CT page G-7
charged battery
No Go to next step
2 Check starter cable connection for looseness Yes Repair or replace connection
and corrosion
OBUOGX-OC
I 1 4
.
Alternator warning lamp illuminates when engine running
STEP INSPECTION ACTION
1 Check for correct battery voltage at idle Yes Check wire harness between alternator L terminal and aI*
Specification: 14.1--14.7V ternator warning lamp
No Check charging system w page G-7
03UOGX-008
5 I Discharged battery I 1TEP INSPECTION
f Check charging system w page G-7 -
6
TEF
1
r
--
Yes
03UOGX-009
ACTION
Turn ignition switch ON and check dark current as shown
Dark current: Below 20mA
No Repair or replace parts as necessary 1
Misfire
INSPECTION
-
Disconnect high-tension lead from each spark
plug and check for strong blue spark while
cranking
, i
Yes
No T-
I
ACTION
- Check spark plug w page G-f8
~3 If OK, engine electrical system normal
~3 If not OK, clean or replace spark plug
Check ignition system ci’ page G-16
1 03UOGX-010
G-5

CHARGING SYSTEM G
TROUBLESHOOTING
INSPlhdN
ACTION
1
Check battery voltage Yes Go to next step Specification: Above 12.4V
No
Check battery ri-page G-8
2 Start engine and check if alternator warning
Yes Go to Step 4
lamp goes out
No Go to next step
3 Check if voltages at alternator terminals are Yes Check wire harness between battery and terminal B
3. Turn all electrical loads ON and depress
2,500-3,000 rpm
l Do not ground terminal B
G-7

CHARGING SYSTEM G
RUB
PRO
03UOGX-01
Terminal and cable
1. Check the tightness of the terminals to ensure good electri-
cal connections.
2. Check for corroded or frayed battery cables.
3. Check the rubber protector on the positive terminal for prop-
er coverage.
4. Clean the terminals if necessary, and coat them with grease.
Recharging
Battery
55D23L Slow charge Quick charge
(A) (4
Under 6 Max. 20
Slow charging
It is not necessary to remove the vent caps to perform a slow
charge.
Quick charging
Remove the battery from the vehicle and remove the vent caps
to perform a quick charge.
Warning
l Before performing maintenance or recharging the
battery, turn off all accessories and stop the engine.
l The negative cable must be removed first and in-
stalled last.
l Set the battery in water when quick charging to pre-
vent overheating the battery.
G-9

G IGNITION SYSTEM
TROUBLESHOOTING
iTEP
INSPECTION
ACTION
1
Check if MIL illuminates when engine is running Yes Check for malfunction code number
and perform troubleshooting (TEN ter-
minal grounded) c7 Section F
No Go to next step
2 Drsconnect high-tension lead from distributor and
Yes
check for strong blue spark while cranking en-
l Check distributor cap and rotor v page G-22
gine * Check high-tension lead
KP page G-19 c7 page G-17
+ Ignition system normal
No
Go to next step
3 Check if resistance of ignition coil is OK
Yes
Go to next step ~7
page G-19
Specification (at 20°C [66”9):
Primary coil winding: 0.81-0.99Q No
Replace ignition coil
Secondary coil winding: IO-16 kQ
-i
Check if resistance of high-tension leads is OK Yes Go to next step
D= page G-17
Specification: 16 kQ per 1 m (3.28 ft)
No Replace high-tension lead
5 Check if igniter is OK
m- page G-23 Yes
Replace ECU
No
Replace igniter
03UOGX-03
G-16

IGNITION SYSTEM G
r
03UOGX-03
SOHC
LOCK BOLTS
DOHC
A LOCK BOLTS I 03UOGX-0’
03UOGX-C
IGNITION TIMING
Adjustment
1. Warm UD the enaine to normal operating temperature.
2. Turn all ‘electricarloads OFF.
3. Turn the A/C switch OFF.
4. Connect the
SST.
5. Set switch A on the System Selector to position
SWITCH to SELF-TEST. 1 and TEST
Note
l To create the test condition without using the Sys-
tem Selector, connect terminals TEN and GND of
the diagnosis connector with a jumper wlre.
6. Check the ignition timing.
Specification
Engine
Ignition timing
BTDC B6 SOHC BP SOHC
60-8O 4O-6O
BP DOHC
9°-110
7. If the ignition timing is not as specified, loosen the distribu-
tor lock bolts and turn the distributor to make the adjustment.
8. Tighten the distributor lock bolts to the specified torque.
Tightening torque:
19-25 N-m (1.9-2.6 m-kg, 14-19 ft-lb)
HIGH-TENSION LEAD
Inspection
1. Measure resistance of the high-tension leads.
Specification: 16 kg per 1 m (3.26 ft)
G-l 7

G IGNITION SYSTEM
-.-.. .----___ 03UOGX-042
03UOGX-04
--.---- J
03UOGX-044
WEAR AND CARBON
/
c- -BURNT
PLUG GAP
L--
c
DAMAGE AND
,llllll....*llll,lllf DETERIORATIOF
; -,DAMAGE
03UOGX.04
G-18
SPARKPLUGS
Removal / Installation
1. Remove and install the high-tension leads carefully.
Caution
l When the spark plug lead is to be pulled off, be sure
to pull the boot itself, not the wire.
Y’
2. Remove and install the spark plug with a plug socket.
Caution
l Be sure the socket is fit squarely over the spark
plug.
3. Apply anti-seize compound or molybdenum-based lubricant
to the spark plug threads.
4. Tighten the spark plug to the specified torque.
Spark plug Tightening torque:
15-23 N.m (1 S-2.3 m-kg, 11-17 f&lb)
Inspection
1. Remove the spark plug.
2. Connect the spark plug to a high-tension lead.
3. Hold the spark plug with insulated pliers
5-10mm
(0.20-0.39 in) from a ground.
4. Crank the engine and verify that there is a strong blue spark.
4
Note
l If there Is no spark, replace the spark plug.
5. Check the following points. If a problem is found, replace
the spark plug.
l Damaged insulation.
l Worn electrodes.
l Carbon deposits.
If cleaning is necessary, use a plug cleaner or a wire
brush. Clean the upper insulator also.
l Damaged gasket.
l Burnt condition.
Plug gap: 1.0-l .l mm (0.039-0.043 in)

IGNITION SYSTEM . . . ._,
03UOGX-04
Lszl /
P
0 V
- 23UOGX-OC
03UOGX-048
03UOGX-04
03UOGX-0%
IGNITION COIL
Inspection
Spark test
1. Disconnect the high-tension lead from the distributor.
2. Hold it with insulated pliers 5-l
Omm (0.20-0.39 in) from
a ground.
3. Crank the engine and verify that a strong blue spark is
visible.
4. If there is no spark, disconnect the connector from the igni-
tion coil and check for voltage at the positive (+) terminal
of the connector with the ignition switch in the ON position.
Specification: Battery voltage
5. If there is no voltage, check the main fuse, ignition switch,
and wire harness.
Primary coil winding
1. Use an ohmmeter and measure resistance of the primary
coil winding. If not within specification, replace the coil.
Prlmary coil resistance: 0.81-0.99112 (at 2O*C [88*F])
Secondary coil winding
1. Use an ohmmeter and measure resistance of the secon-
dary coil winding. If not within specification replace the coil.
Secondary coil resistance: lo-18 kQ (at 20°C [68*F])
Insulation of case
1. Use a 500V megger tester to measure the insulation resis-
tance between each terminal and the case.
Speclficatlon: 10 MS1 min.
G-19

G STARTING SYSTEM
1 03lJOGX.079
23LJOGX-011
I I OBUOGX-081
3. Place the armature on V-blocks, and measure the runout
with a dial indicator.
If the runout is not within specification, repair it with a lathe
or replace the armature.
Runout: 0.05mm (0.002 in)
Maximum: O.lmm (0.004 in)
4. Replace the armature if the outer diameter of the commu-
tator is almost at or less than the grind limit.
5. If the commutator surface is dirty, wipe it with a cloth; if it
is rough, repair it with a lathe or fine sandpaper.
Engine
Grind limit mm (in) 1 B6 1 BP (MTX) 1 BP (ATX)
31.4 (1.24) 1 28.8 (1.13)
6. Segment groove depth
If the depth of the mold between segments is almost at or
less than the minimum, undercut the grooves to the stan-
dard depth.
Depth: OS-0.8mm (0.02-0.03 in)
Minimum: 0.2mm (0.008 in)
Bearing (if equipped)
1. Check for abnormal noise, looseness, or sticking.
2. Replace the bearing(s) if necessary.
I
03UOGX-082
G-30