1992 MAZDA PROTEGE distributor

.-
IDLE SPEED CONTROL (ISC) SYSTEM I-
IDLE SPEED CONTROL (ISC) SYSTEM
DESCRIPTION
BP SOHC
AIR VALVE THROTTLE SENSOR
CLUTCH SWITCT (MTX)


‘IS PRESS/URE SWITCH ‘x.

. , SIS CONNECTt
(TEN TERMINAL)
DISTRIBUTOR
INHIEITOR SWITCH (ATX)/
NEUTRAL SWITCH (MTX) 3R
To improve idle smoothness, the ISC system controls the intake air amount by regulating the bypass air amount
that passes through the throttle body. This system consists of the ISC valve, air valve, ECU and input devices.
F-115

CONTROL SYSTEM
Ve: Battery
arminal Input Output Connection to lest condition Correct voltage Remark
2A - - Ground (Injector) Constant ov -
28 - - Ground (Output) Constant ov -
2c - - Ground (CPU) Constant ov -
2D - - Ground (Input) Constant ov -
2E 0 Distributor Ignition switch ON
Approx. OV
(Ne-signal) or 4.5-5.5V -
Idle Approx. 2V
2F - - - - - -
2G 0 Distributor Ignition switch ON Approx. OV
(G-signal) [DOHC] or 4.5-5.5V
Idle Approx. 1.5V
2H 0 Ground (California) Constant ov
-
Main relay Ignition switch ON Va
(Canada)
21 - - - - - -
2J 0 Open Constant Approx. l-29 -
2K 0 Throttle sensor Constant 4.5-5.5v
(ATX)/Airflow meter
-
2L 0 Throttle sensor
(Power switch) Accelerator pedal released
Accelerator pedal fully depressed Approx. 4.5~5%
ov -
2M 0 Throttle sensor Accelerator pedal released
Accelerator pedal fully depressed Approx. 0.5V
Approx. 4.OV -
2N 0 Oxygen sensor Ignition switch ON ov
Idle (Cold engine) ov
Idle (After warm-up) O-l .ov -
Increasing engine speed (After warm-up) 0.5-I .ov
Deceleration o-0.4v
20 0 Airflow meter Ignition switch ON Approx. 3.8V
-
Idle Approx. 3.3V
2P 0 Intake air ther- Ambient air temperature 20% (68OF) Approx. 2.5V Built in airflow
mosensor meter
2Q 0 Water thermo- Engine coolant temperature 20% (68’F) Approx. 29
_
sensor
After warm-up Below 0.5V
2R - - - - -
- 711 ICIFX-12 voltage
_““_. ,. .I 7
1 r u-
r-i Ll r
2Y 2w 2u 2s 20 20 2M 2K 21 2G 2E 2~2 2A 1U 1s 1Q 10 lft,j ,K ,, ,G ,E ,c ,A
22 2x 2v 2T 2R 2P 2N 2L 2J 2H 2F 2D 28
IV 1T fR 1p 1N 1L 1J ,H IF ID ,B
F-l 54

CONTROL SYSTEM
VB: Battery voltage
erminal Input Output
Connection to Test condition Correct voltage
Remark
1L
0 A/C relay Ignition switch ON VB
A/C switch ON at idle Below 2.5V
A/C switch OFF at idle V0
-
1M 0
1N 0 Vehicle speed
sensor
P/S pressure
switch While driving 4--5v
Vehicle stopped 0 or 8V
Ignition switch ON
VB
P/S ON at idle
ov
P/S OFF at idle Vi3 -
-
10 0 A/C switch A/C switch ON
A/C switch OFF Below 2.5V ignition switch
VB ON and blower
motor ON
IP 0 Blower control
switch Blower control switch OFF or 1st position Ve ignition switch
Blower control switch 2nd or higher po- Below 1 .OV ON
sition
1Q 0
1R 0
1s 0
IT 0 Stoplight switch Brake pedal released Below 1 .OV
-
Brake pedal depressed VI3
Inhibitor switch N or P range ov Ignition switch
(P, N ranges) ON
Other range VI3
Cruise control main Normal condition
VB Ignition switch
switch ON
Set or Resume switch ON or vehicle speed Below 1 .OV
8 km/h (5 mph) lower than preset speed
(Driving vehicle cruise control operation)
Throttle sensor Accelerator pedal released Below 1 .OV Ignition switch
(Idle switch)
Accelerator pedal depressed V0 ON
1u - - -
- - -
1v - - - -
- -
2A 0 Distributor Ignition switch ON Approx. OV
(Ne-signal) or 5V -
Idle Approx. 2V
LY”“l I. A3 311 blFY.1.
J
- .*
F-160

F CONTROL SYSTEM
VB: Battery voltage
erminal Input Output Connection to
Test condition Correct voltage Remark
28 1 0 )
1 Airflow meter Ignition switch ON Approx. 3.8V
-
2c 0 Oxygen sensor
2D 0 Fan switch Idle Approx. 3.3V
Ignition switch ON ov
Idle (Cold engine)
ov
Idle (After warm-up) O-l .ov -
increasing engine speed (After warm-up) 0.5-I .ov
Deceleration o-0.4v
Fan operating (Engine coolant tempera- ov
ture over 97OC (207°F) or diagnosis con-
nector terminal TFA grounded) -
2E 0 Water thermo-
sensor Fan not operating (Idle) VS
Engine coolant temperature 20% (68OF)
After warm-up Approx. 2.5V f&ition switch
Below 05V
2F , 0 , , Throttle sensor , Accelerator pedal released
Accelerator pedal fully depressed
2G 0
2H 0 ATF thermosensor -30°C (-20°F) -150°C (302OF) Approx. 4.9%1.12V Ignition switch
ATF
Temp 20% (68OF) Approx. 4.6V ON
130% (266OF) Approx. 1.54V
Hold switch Switch debressed ov Ignition switch
i I I
Switch released Va ON
21 0 Throttle sensor Constant 4.5-5.5v Ignition switch
ON
I , I 2J 0 Distributor Ignition switch ON Approx. OV
(G-signal) [DOHC] or 5V _-
Idle Approx. 1.5V
2K 0 Intake air ther- Ambient air temperature 20% (68’F) Approx. 2.5V Built in airflow
mosensor meter
2L - - - -
- -
2M 0 Pulse generator Engine running at idle (N range) Above 0.6V
-
(IN)
Engine stopped (Ignition switch ON) ov
2N Pulse generator Constant ov
ground
20 0 Solenoid valve ignition switch ON Va
(Purge control) -
Idle Va
2P 0 Hold indicator Hold mode Below 2V Ignition switch
ON
Normal mode VB
23UOFX-1
1 Ul Iv
I u1
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4-
F-l 62

G
ENGINE ELECTRICAL SYSTEM
INDEX ......................................................
OUTLINE ..................................................
SPECIFICATIONS .................................... G- 3
TROUBLESHOOTING
GUIDE.. .................... G-
4
DIAGNOSTIC INDEX ................................
SYMPTOM TROUBLESHOOTING..
............. :- t
-
CHARGING SYSTEM ................................. G- 6
PREPARATION .......................................
CIRCUIT DIAGRAM ................................. :I ;
TROUBLESHOOTING .............................. G- 7
BATTERY ............................................... G- 6
ALTERNATOR ........................................ G-10
DRIVE BELT ........................................... G-14
IGNITION SYSTEM .................................... G-15
PREPARATION ....................................... G-15
CIRCUIT DIAGRAM ................................. G-15
TROUBLESHOOTING .............................. G-16
IGNITION TIMING ................................... G-17
HIGH-TENSION LEAD .............................. G-17
SPARK PLUGS ....................................... G-16
IGNITION COIL ....................................... G-19
DISTRIBUTOR ........................................ G-20
IGNITER ................................................ G-23
STARTING SYSTEM .................................. G-24
PREPARATION ....................................... G-24
CIRCUIT DIAGRAM ................................. G-24
STARTER ...............................................
G-25
STARTER INTERLOCK SWITCH (MTX)
........ G-31
03UOGX-001

G INDEX
NDEX
- 03UOGX-00:
6. Ignition coil 1. Battery
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page G- 8
Recharging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..t page G- 9
2. Alternator
Removal / Installation . . . . . . . . . . . . . . . . . .
page G-l 0
Disassembly / Assembly . . . . . . . . . . . . . page G-l 1
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
page G-l 2
3. Drive belt
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
page G-l 4
Adjustment . . . . . . . . page G-l 4
Replacement . . . . . . . . . . . . . .
page G-l 4
4. High-tension lead
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page G-l 7
5. Spark plugs
Removal / Installation . . . . . . . . . . page G-1 0
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
page G-l 8
G-2
Inspection .,.. . . . . . . . . . . . . . . . . I . . . . . page
G-l 9
7. Distributor
Spark test ., . . . . . . . . . . ,... . . . . . . . .
page G,-20
Electronic advance inspection page G-20
Removal / Installation ,................. page G-21
Disassembly / Assembly.. , . . page
G-22
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
page G-22
8. Igniter
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
page G-23
9. Starter
Removal / Installation .;...........,.... page G-25
Disassembly ! Assembly . . . . . . . . . . . . . page G-26
Inspection . . . . ...‘........................,,,
page G-28 .--
10. Starter interluck switch
Inspection... . . . . . . . . . . . . . . . . . . . . ,.., ,...,
page G-31

OUTLINE G
OUTLINE
SPECIFICATIONS
Item EnginelTransaxle
‘-2, B6 SOHC BP SOHC BP DOHC
MTX 1 ATX MTX ( ATX
Voltage v 1 12
I
3attery
Dark current*’ Type and capacity
(20-hour rate)
mA 55D23L (60AH) 55D23L (60AH)
Max. 20.0
L\lternator
Starter
Type AC
output V-A 12-65
Regulator type Transistorized (built-in IC regulator)
Regulated voltage V 14.1-14.7
Brush length Standard 21.5 (0.846)
mm (in) Minimum 8.0 (0.315)
Drive belt deflection
New
98 N (10 kg, 22 lb)
mm (in) Used 8-Q (0.31-0.35)
Q-10 (0.35-0.39)
Type
I Direct Direct
I Coaxial
Direct Coaxial
reduction reduction I
output V-kW 12-0.95 12-0.95 12-1.4
12-0.95 12-1.4
Brush length Standard 17 (0.67) 17 (0.67) 17.5 (0.69) 17 (0.67)
17.5 (0.69)
mm (in) Minimum 11.5 (0.453) 11.5 (0.453) 10.0 (0.39) 11.5 (0.453) 10.0 (0.39)
Distributor
Ignition timing BTDC
(TEN terminal of diagnosis connector grounded) Electronic spark advance (photo diode)
6O--8O 4O-6O Q”-1 1 o
Ignition coil
Spark plug Resistance
(at 20% [68OF]) Primary
coil winding 0.81-O.QQg
Secondary
coil winding IO-16 kg
BKR5E-11 BKR5Ell BKR5Ell
NGK
BKR6E-11 BKRGEl 1 BKRGEli
BKR7Ell
Type NIPPON-
DENSON Kl GPR-Ul l
K20PRU 11 KIGPR-Ull
K20PR-Ul l KIGPR-Ull
K20PRUll
K22PR-Ul l
I Plua aao mm (in) I 1.0-l .l (0.039-0.043)
Firing order
’ Dark current is the constant flow of current while the ignition switch is OFF.
(i.e. engine control unit, audio, etc.) l-3-4-2
23lJOGX-00
G-3

IGNITION SYSTEM G
IGNITION SYSTEM
PREPARATION
SST
49 NO18 001
Adapter Harness
CIRCUIT DIAGRAM
ECU
T
IGNITION SWITCH
,
I
DISTRIBUTOR
7
1 ZL BATTERY
IGNITER
03UOGX-03t
G-15