1992 MAZDA PROTEGE battery

F SELF-DIAGNOSIS FUNCTION
r C :ODE No.
03 (DISTRIBUTOR G-SIGNAL) - DOHC ¶
El
i- I
INSPECTION
Check distributor circuit for poor connection ACTION
Yes Repair or replace connector
1
2
-s-
-T-
--c
--if-
7
-ii- No
I I Go to next step
Check if Code No.02 is also present Yes
I I Go to next step
Check terminal-wire for continuity No Go to Step 5
Yes Go to next step
Check if battery voltage exists at distributor
terminal-wire No Repair of replace
Yes Go to next step
No
I I
Check for open circuit in wiring from
distributor to main relay
Check terminal-wire between distributor and
Yes Go to next step
ECU terminal 2G (MTX) 2J (ATX) for continuity
and ground
No Repair or replace
Ct$; if$CU terminal 2G (MTX) 2J (ATX) volt- Yes Replace ECU r=+ page
F-149 CT page
F-154 No
Go to next step
Check if OV or 4.5V--53 exists at distributor Yes
I I Replace distributor
terminal-wire
No
I I Go to next step
I Check if 4.5V--5.5V exists at ECU terminal 2G
(MTX) 2J (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 I 23UOFX-0: i5
F-88

SELF-DIAGNOSIS FUNCTION F
TEP
6
7
8
9
IO
11 INSPECTION
Check for correct fuel line pressure at idle
IV page F-122
Fuel line pressure:
265-314 kPa (2.7-3.2 kg/cm’, 38-46 psi)
(Vacuum hose to pressure regulator
disconnected)
Check intake air system components for air
leakage
Check for misfire of dead cylinder from Step 5
inspection
Check for injector operating sound at idle of
dead cylinder from Step 5 inspection -
Replace injector at dead cylinder from Step 5 in-
spection
CI page F-131
Check if same Code No. is present following
performing after-repair procedure
CT page F-104
Try known good ECU and check if condition
Improves
CT page F-149 Yes
No
Yes If not clogged, check fuel pump
maximum pressure
Go to Step 11
No Replace
--
Yes Repair or replace ignition system
No
Yes
No
Yes
No
T L ACTION
Go to next step
Low pressure
Check fuel line pressure while pinching
fuel return hose
~3 If fuel line pressure quickly in-
creases, check pressure regulator
v page F-129
c3 If fuel line pressure gradually in-
creases, check for clogging be-
tween fuel pump and pressure
regulator
CT page F-126
Go to next step
Go to next step
Check for battery voltage at injector
connector terminal-wire (W/R)
L3 If Yes, replace injector c7 page F-131
+ If No, check wire harness for short
or open
Go to next step
Removed injector at fault
Circuit Diagram
ATX
OXYGENSENSOR
R/L
ECU
-------------- ---
BILG
23UOFX-07
F-10'

SELF-DIAGNOSIS FUNCTION
:ODE No. 1 25 (SOLENOID VALVE - PRESSUREREGULATORCONTROL)-BPENGINE
r (
TEP
1
-
2
-
3 I
INSPECTION
Disconnect connector from ECU and check if
battery voltage exists at ECU terminal 2T (MTX)
3M (ATX) wire (G/O) with ignition switch ON
In same condition as Step 1, check if battery
voltage exists at solenoid valve connector
terminal-wire (G/O) ACTION
Yes Check ECU terminal connector for poor -
connection
* If OK, replace ECU CT page F-149
+
If not OK, repair or replace connector
No Go to next step
Yes Repair or replace wire (G/O)
No Go to next step
Check if solenoid valve is OK Yes Check for short or open circuit in wiring
w page F-135 from main relay (FUEL INJ relay) to
solenoid valve
No Replace solenoid valve
I I I
23UOFX-077
:ODE No. 26 (SOLENOID VALVE - PURGE CONTROL)
STEP INSPECTION
Disconnect connector from ECU and check if
battery voltage exists at ECU terminal 2X (MTX)
20 (ATX) wire harness (W/L) with ignition switch
ON Yes
No
In same condition as Step 1, check if battery
Yes
voltage exists at solenoid valve connector
terminal-wire (W/L)
No
Check if solenoid valve is OK
Yes
w page F-140
t- No
--
4 ACTION
Check ECU terminal connector for poor
connection
ti If OK, replace ECU c;p page F-149
e
If not OK, repair or replace connector
Go to next step
Repair or replace wire harness (W/L)
Go to next step
Check for short or open circuit in wiring
from main relay (FUEL INJ relay) to
Circuit Diagram
MTX
I-
FROM
BATTERY
FROM
23UOFX-07 9
F-l 02

SELF-DIAGNOSIS FUNCTION F
1
CODE No. 34 (ISC VALVE)
1 ACTION
Yes Check ECU terminal connector for poor
connection INSPECTION
Disconnect connector from ECU and check if
battery voltage exists at ECU terminal 2W (MTX)
3Q (ATX) wire (L/O) with ignition switch ON
c3 If OK, replace ECU
+ If not OK, repair or replace con-
nector w page F-149
No Go to next step
In same condition as Step 1, check if battery
voltage exists at ISC valve connector terminal.
wire (L/O) Yes ) Repair or replace wire (L/O)
No Go to next step
Yes Check for short or open circuit in wiring
from main relay (FUEL INJ relay) to ISC
valve
No Replace ISC valve Check ISC valve for correct resistance
w page F-i 16
Resistance: 1 l-130 [at 20°C(68”F) ]
I 23UOFX-08( I
r C :ODE No. )
41 (SOLENOID VALVE - VICSbDOHC
I
ii
T
I
INSPECTION
ACTION
Check ECU terminal connector for poor
connection
in’
I
* If OK, replace ECU w page F-149
c3 If not OK, repair or replace con-
nector
No Go to next step Disconnect connector from ECU and check if
battery voltage exists at ECU
terminal 2S (MTX)
31 (ATX) wire (B/R) with ignition switch ON
2 In same condition as Step 1, check if battery voltage exists at solenoid valve connector
terminal-wire (B/R)
Check if solenoid valve is OK
w page F-l 18 Yes Repair or replace wire (B/R)
No Go to next step
Yes Check for short or open circuit in wiring
from main relay to solenoid valve
No
Replace solenoid valve
23UOFX-081 3
Circuit Diagram
ATX
ISC VALVE
FROM
BATTERY 4
FROM
L
IGNITION d++n.D,,
SWITCH
MAIN RELAY
(FUEL INJ RELAY) S
4\ ECU
SOLENOID VALVE
i(VICS) [DOHC]
W/R ,,
\
SOLENOID VALVE ,
(PURGE CONTROL)
23UOFX-082
F-i 03

F SELF-DIAGNOSIS FUNCTION
23UOFX-08: 3
03UOFX.086
i:a pj
MONITOR
SELECT El
03UOFX-:6
7
I
7
After-repair Procedure
1. Cancel the memory of malfunctions by disconnecting the
negative battery cable for
at least 20 seconds. Reconnect
the negative battery cable.
2. Connect the
SST (System Selector) to the diagnosis con-
nector.
3. Set the switch @to position 1.
4. Set TEST SW to SELF-TEST.
5. Connect the
SST (Self-Diagnosis Checker) to the System
Selector and a ground.
6. Set the select switch of the Self-Diagnosis Checker to posi-
tion A.
7. Turn the ignition switch ON.
8. Start and warm up the engine, then run it at
2,000 rpm for
three minutes.
9. Verity that no code numbers are displayed.
F-l 04

SELF-DIAGNOSIS FUNCTION F
SWITCH MONITOR FUNCTION
Individual switches can be inspected by the SST (Self-Diagnosis checker).
Note
l The TEN terminal of the diagnosis connector must be grounded and the ignition switch ON
(engine stopped).
l If either of the switches remain activated, the monitor lamp will be illuminated.
ECU
NEUTRAL SWITCH (MTX)
CLUTCH SWITCH (MTX)
=d-’ 1
BATTERY
INHIBITOR SWITCH (ATX)
STOPLIGHT SWITCH (MTX)
HEADLIGHT SWITCH MONITER LAMP
REAR WINDOW (SELF-DIAGNOSIS CHECKER)
DEFROSTER SWITCH
AIC SWITCH
BLOWER SWITCH
THROTTLE SENSOR asp-
- _
COOLING FAN SWITCH
03UOFX
Switch
Clutch switch
Neutral switch (MW
(M-W Self-Diagnosis Checker (Monitor lamp)
Light ON Light OFF Pedal released Pedal depressed
In gear Neutral Remark In gear
Clutch pedal released
Inhibitor switch
(ATX) L, S, D or R range
N or P range -
Throttle sensor Pedal depressed (Not fully) Pedal released/fully depressed -
Stoplight switch
Pedal depressed Pedal released -
Headlight switch
ON
OFF Headlights/parking lights: ON
Blower switch
ON
OFF Blower switch at 2nd or
above position
AIC switch
ON OFF Fan speed control at 1st po-
sition
Rear window defroster
switch ON
OFF -
Water thermoswitch Fan operating Fan not operating -
23UOFX-084
F-l 05

VARIABLE INERTIA CHARGING SYSTEM (VICS)
SYSTEM OPERATION
DIAGNOSIS 1. Connect the tachometer to the IG- terminal of the diagno- CONNECTOR sis connector.
2. Start the engine and run it at idle.
3. Verify that the rod of the shutter valve actuator has pulled -
inward.
OSUOFX-I 19
F-118
i-..
1”
03UOFX-I 2
23UOFX-1 C
23UOFX-1 C
23UOFX-IC
4. increase the engine speed gradually and verify that the rod
is extended when the engine speed reaches 5,000 rpm.
SHUTTER VALVE ACTUATOR
Inspection
1. Remove the vacuum hose from the actuator.
2. Verify that the rod can move in and out smoothly.
3. Start the engine and run it at idle.
4. Place a finger over the end of vacuum hose and verify that
there is vacuum.
5. Install the vacuum hose and verify that the rod is pulled
inward.
SOLENOID VALVE (VICS)
Inspection
1. Remove the three-way solenoid valve.
2. Verify that air flows between each port as below.
Port
@--@ - -
@-0
@ --- (g Air flow
No
No
Yes
3. Connect battery voltage and a ground to the terminals of
the solenoid valve.
4. Verify that air flows between each port as below.
Port Air flow
-_I
-I_
@- 03 Yes
@l-o No
@--0 No

F FUEL SYSTEM
OSUOFX-129
DIAGNOSIS.\CO.NNECTOR j
/, I 23UOFX-104
DISCONNECT CONNECTOR
TO RELEASE FlJsL PRESSURE
L 23UOFX-105
INSTALL CLAMPS
DIAGNOSI$kO)lNECTOfl
I
23UOFX-ll
F-l 22
1. Disconnect the negative battery terminal.
2. Install a fuel pressure gauge between the fuel pipe and the
fuel main hose. (Install clamps as shown.)
3. Connect the negative battery terminal. J
4. Connect the diagnosis connector terminals
F/P and GND
with a jumper wire.
5. Turn the ignition switch ON for
10 sec. to operate the fuel
pump.
6. Turn the ignition switch OFF and disconnect the jumper wire.
7. Observe the fuel pressure
after 5 min..
Fuel pressure:
More than 147 kPa (1.5 kg/cm2, 21 psi)
8. If not as specified, perform the following inspections.
l Fuel pump hold pressure. (Refer to page F-125.)
l Pressure regulator hold pressure.
(Refer to page F-129.)
l Injector fuel leakage. (Refer to page F-132.)
Fuel Line Pressure Inspection
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 F-121.) __,
1. Disconnect the negative battery cable.
2. Install a fuel pressure gauge between the filter and the fuel
main hose. (Install clamps as shown.)
3. Connect the negative battery cable.
4. Connect diagnosis connector terminals
F/P and GND with
a jumper wire.
5. Turn the ignition switch ON.
6. Measure the fuel line pressure.
Fuel line pressure:
265-314 kPa (2.7-3.2 kg/cm2, 38-46 psi)
Pressure low - Measure fuel pump maximum pressure.
(Refer to page F-126.) If as specified,
fuel line or fuel filter might be clogged or
restricted.
Pressure high - Replace pressure regulator.
(Refer to page F-130.)