1992 MAZDA PROTEGE lock

F SELF-DIAGNOSIS FUNCTION
Troubleshooting
If a service code number is shown on the SST, check for the cause by using the chart related to the code
number shown.
Service code number
CODE LOCATION OF
NO.
MALFUNCTION OUTPUT SIGNAL PATTERN
SELF-DIAGNOSIS FAIL-SAFE
02
Ne-signal
:E nl-u No Ne-signal
-
03 G-signal
(DOHC) No G-signal Cancels 2-group
injection
06* Vehicle speed
sensor ON
OFF No input signal from Shifting performed
vehicle speed normally
sensor
08 Airflow meter ON
OFF Open or short circuit Basic fuel injection
amount fixed as for two
driving modes
(1) Idle switch ON
(2) Idle switch OFF
09 Water
thermosensor ON
OFF Maintains constant 20%
(68OF) command
10 Intake air
thermosensor Maintains constant 20°C
(68OF) command
12
Throttle sensor
“,E l--uL-l Throttle opening judged
as full stroke lockup not
provided
Atmospheric ON Maintains constant
14 pressure sensor command of sea level
(in ECU)
OFF pressure
15 Oxygen sensor
(inactivation) ON
OFF Sensor output
continues less than
0.55V 95 sec. after
engine starts
(1500 rpm) Cancels engine feedback
operation
Oxygen sensor ON Sensor output Cancels engine feedback
17
(Inversion) continues uncharged operatron
OFF 50 sec. after engine
exceeds 1500 rpm
Solenoid valve ON
25 (pressure
regulator)
OFF u 1 nnluln Open or short crrcurt
“If the marked code numbers appeor, refer to Section K
F-84

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 POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
POSITIVE CRANKCASE VENTILATION (PCV) SYSTEM
DESCRIPTION
The PCV valve is operated by the intake manifold vacuum.
When the engine is running at idle, the PCV valve is opened slightly and a small amount of blowby gas
is drawn into the dynamic chamber to be burned.
As the engine speed rises the PCV valve is opened further, allowing a larger amount of blowby gas to be
drawn into the dynamic chamber.
23UOFX.1; !5
-7
F-l 38
9MUOF2-164
PCV VALVE
Inspection
OBUOFX-176
1. Warm up the engine to the normal operating temperature
and run it at idle.
2. Disconnect the PCV valve with the ventilation hose from the
cylinder head cover,
3. Block the PCV valve opening.
4. Verify that there is vacuum.
5. Remove the PCV valve.
6. Blow through the valve from port @ and verify that air
comes out of port @I.
7. Blow through the valve from port @ and verify that no air
comes out of port @.
8. Replace the PCV valve if necessary.

F DECELERATION CONTROL SYSTEM
DECELERATION CONTROL SYSTEM
DESCRIPTION
The dashpot is used to prevent the throttle valve from suddenly closing
03UOFX-185
1
DASHPOT
Inspection
1. Open the throttle valve fully. Push the dashpot rod with a
finger and verify that it goes into the dashpot slowly.
2. Release the rod and check that it comes out quickly.
3. Replace the dashpot if not as specified.
,,
OBUOFX-18
4. Warm up the engine and run it at idle.
5. Connect a tachometer to the diagnosis connector IG-
terminal and increase engine speed to 4,000 rpm.
6. Slowly decrease the engine speed and check that the le-
ver touches the dashpot rod at the specified speed.
Specification:
l B6 ..**.............,....,.............. Approx. 3,000 rpm
l BP SOHC . ..*..................*.... Approx. 2,700 rpm
l BP DOHC . . . . . . . . . . . . . . . . . . . . ...“... Approx. 3,500 rpm
7. If not as specified, loosen the locknut and turn the dashpot
to adjust.
F-l 42

CONTROL SYSTEM F
VB: Battery voltage
incorrect voltage POBSible cause
Alwvs OV’ l ROOM IOA fuse burned l Open circuit in wiring from ROOM IOA fuse to ECU terminal 1A
Always OV
l Main relay malfunction (Refer to page F-171) l Open or short circuit in wiring from main relay to ECU terminal 1B
I
Always OV (Starter turns) l Open or short circuit in wiring from starter interlock switch (USA), ignition
switch (CANADA), to ECU terminal 1C
I
Always OV
Always Vs
Always approx. 5V
l Main relay (FUEL IWJ relay) malfunction (Refer to page F-171) l Open circuit in wiring from main relay to diagnosis connector terminal +B l Open or short circuit in wiring from diagnosis connector terminal MEN to
ECU terminal 1D
l Poor connection at ECU connector l ECU malfunction
l ECU malfunction
Always below
23 MIL always ON
MIL never ON
l Short circuit in wiring from combination meter to ECU terminal 1E l ECU malfunction
l Open circuit in wiring from combination meter to ECU terminal 1E
I
Always Ve l Poor connection at ECU connector l ECU malfunction
Always below
2.5V
Always
VB
No display on Self- * Main relay (FUEL INJ relay) malfunction (Refer to page F-171)
Diagnosis Checker l Open circuit in wiring from main relay to diagnosis connector terminal +B
“88” displayed and
l Open or short circuit in wiring from diagnosis connector terminal FEN to
buzzer sounds con- ECU terminal 1F
tinuously
l Poor connectron at ECU connector l ECU malfunction
Always OV
l Short circuit in wiring from igniter to ECU terminal 1G
I -
I -
I
I -
I -
I
Always below
2.5V
Always VB AIC does not operate l A/C relay malfunction (Refer to page U-55) l Open circurt in wiring from ignition switch to A/C relay l Open circuit in wiring from A/C relay to ECU terminal 1J
A/C switch OFF but
l Short circuit in wiring from A/C relay to ECU terminal IJ
AIC operates l ECU malfunction
l Poor connection at ECU connector l ECU malfunction
Always below l.OV
l Short circuit in wiring from diagnosis connector terminal TEN to ECU termi-
nal 1K
Always Vs
l Open circuit in wiring from diagnosis connector terminal TEN to ECU termi-
nal 1K
l Open circuit in wiring from diaonosis connector terminal GND to ground
Always below
2.W
Always Va DRL ON when ignition
l Short circuit in wiring from DRL relay to ECU terminal IL
switch ON l Short circuit in wiring from DRL relay to DRL unit
DRL never ON
l Open circuit in wiring from DRL relay to ignition switch
l Parking brake switch always ON l DRL unit malfunction (Refer to page T-33)
23UOFX- 134
F-l 51

F CONTROL SYSTEM
Ve: Battery voltage
erminal Input Output
Connection to Test condition Correct voltage Remark
3u 0 Injector (Nos. 1, 3) Ignition switch ON VB * Engine Signal
Idle Va Monitor: Green
and red lamps
Engine speed above 2,000 rpm on de- Va
flash
celeration (After warm-up)
3v 0 Injector (Nos. 2, 4) ignition switch at idle
VB
Idle VB
Engine speed above 2,000 rpm on de-
VB
celeration (After warm-up)
3W 0 1-2 shift solenoid Solenoid valve ON i&I AT running
valve
Solenoid valve OFF ov
3x 0 2-3 shift solenoid Solenoid valve ON
VB AT running
valve
Solenoid valve OFF ov
3Y 0
ZH;hift solenoid Solenoid valve ON VB AT running
Solenoid valve OFF ov
32 0 Lockup solenoid Solenoid valve ON
VB AT running
valve
Solenoid valve OFF ov
23UOFX-1~
1 I u- l-1 ,
III h-3
I r
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32 )3X I3Vj3Tj3R]3Pj3N]3L 3Jj3Hj3F13D 138 2P)2N)2L~2J~2H~2F~2D~2B 1V IlTjlRjlP 1NjlL 1JjlH 1FI lD\lB
-*’
.J’ -
F-l 66

CONTROL SYSTEM
Ve: Betterv voltaae
Incorrect voltage Possible csuse
Always OV l Main relay (FUEL INJ relay) malfunction (Refer to page F-172) l Open or short circuit in wiring from injector to ECU terminal 3U or 3V
Always Ve
l ECU malfunction
Always OV
Always Ve
l 1-2 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 3W
I
l l-2 shift solenoid valve malfunction (Refer to page K-143) l Ooen circuit in wiring from solenoid valve to ECU terminal 3W
Always OV
l 2-3 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wirino from solenoid valve to ECU terminal 3X
Always VB
Always OV
l 2-3 shift solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 3X
l 3-4 shift solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 3Y
Always
VB l 3-4 shift solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 3Y
Always OV
l Lockup solenoid valve malfunction (Refer to page K-143) l Short circuit in wiring from solenoid valve to ECU terminal 32
Always Ve
l Lockup solenoid valve malfunction (Refer to page K-143) l Open circuit in wiring from solenoid valve to ECU terminal 32
23UOFX-1 E i0
F-l 67

F CONTROL SYSTEM
0.7mm (0
GAUGE
1 SUOFX-10 3 03UOFX-235
03UOFX.22 5 IDL
E
03UOFX-22t 5
4. Loosen the two attaching screws.
5. Rotate the throttle sensor clockwise
approx. 30 degrees,
then rotate it back counterclockwise until the continuity
exists.
6. Replace the feeler gauge with a
0.7mm (0.027 in) gauge.
7. Verify that the continuity does not exist.
8. If it exists, repeat Steps 3 through 6. ‘-
9. Tighten the two attaching screws.
Note
l Do not move the throttle sensor from the set posi-
tion when tightening the screws.
10. Open the throttle valve fully a few times.
11. Recheck the adjustment of the throttle sensor.
Adjustment (ATX)
1. Disconnect the connector from the throttle sensor.
2. Connect an ohmmeter between the throttle sensor termi-
nals E and IDL.
3. Loosen the two attaching screws.
4. Insert a
0.25mm (0.01 in) feeler gauge between the throt-
tle stop screw and the stop lever.
5. Rotate the throttle sensor clockwise
approx. 30 degrees,
then rotate it back counterclockwise until there is continuity. i-
6. Replace the feeler gauge with a
0.4mm (0.016 in) gauge
and verify that there is no continuity.
7. If there is continuity, repeat Steps 4 through 6.
8. Tighten the two attaching screws.
Note
l Do not move the throttle sensor from the set posi-
tion when tightening the screws.
9. Open the throttle valve fully and verify that the resistance
between the throttle sensor terminals E and VT is
approx.
5 kQ.
F-l 70