1987 MITSUBISHI MONTERO igniter

IGNITION SYSTEM -General Information 8-105
IGNITION SYSTEM
GENERAL INFORMATION
NOUGAAB
The ignition system consists of battery, distributor, (igniter-integrated) ignition coil, spark plug, high tension cable,
ignition switch and connecting wire.
Ignition
switch
0

m
I
1 AMR 1Gl
I
Ignition
coil
r
Ignite; Distributor
lEL117
The distributor is composed of signal generator (signal rotor and igniter internalized pickup), linear current control
unit (igniter) advance control unit (governor and vacuum controller) and distribution unit (rotor plus distributor cap).

IGNITION SYSTEM-General Information
IISTRIBUTOR
Vacuum controller
lEL153
IGNITER OPERATION
(1) When the signal rotor revolves a projection inside the signal rotor alternately moves away from and faces
towards the core detector inside the igniter.
(2) When the projection is separated from the core, an oscillating electrical circuit begins to oscillate, and when it
faces, magnetic flux issuing from the core moves across the inside of the signal rotor, so when loss increases,
oscillation ceases.
(3) This oscillation introduces power to the oscillation detector circuit, and after output is amplified it drives the
power transistor. During oscillation (when the projection and core are apart) electricity flowing through the
ignition coil and when oscillation stops (when the projection and core are facing) the electric current is inter-
rupted.
(4) The electrical detection circuit, in preventing excessive electrical flow to the power transistor, protects the
transistor.
Ignition
switch
m Sig,nal rotor
Detection coil
and core -I- ----
Power
Oscillation - Amplifier
detector
Oscillation
Current
ditector
Igniter J152
-.I-
T
1 Battery
I
-
T
1 STB Revision
-7

IGNITION SYSTEM - Specifications 8-107
SPECIFICATIONS
GENERAL SPECIFICATIONS
DISTRIBUTOR N08GB.B
Type
Model No.
Part No.
Igniter
Firing order Items Federal
Contact pointless type
T3T61980A
MD109013
Built-in type
1-3-4-2 California
Contact pointless type
T3T65571
MD1 10264
Built-in type
1-3-4-2
IGNITION COIL
Type
Model No.
Part No. Items
Oil filled
E-089
M DO73079 Specifications
SPARK PLUG
Items
Factory installed plug Model No. Manifacturer
W20EP-U 10 NIPPON DENS0
W20EPR-Sll
BURGEA-1 1
Alternate plug BPGES-1 1
BPRGES-1 1
BUGEA-11 NGK
W20EPR-U IO
W20EPSll NIPPON DENS0
IGNITION SWITCH
Items
ignition switch
Load capacity
AM-ACC
AM-IG
AM-ST
AM-R
Voltage drop (under actual load)
Key reminder switch
Rated load
Voltage drop Specifications
15A
30A
15A
15A
0.1 V or less
IW
0.2 V or less
) STB Revision

IGNITLON SYSTEM -Troubleshooting 8-109
TROUBLESHOOTING
NOBGH--
Symptom Probable cause
Remedy
Reference
paw
Engine will not start or
Incorrect ignition timing
8-111
hard to start (cranks Adjust ignition timing
OKI Ignition coil faulty
Inspect ignition coil 8-116
Ignition faulty
Inspect igniter
8-120
Distributor faulty
Inspect distributor 8-120
High tension cord faulty
Inspect high tension 8-116
cord
Spark plugs faulty Replace plugs 8-115
Ignition wiring disconnected or broken
Inspect wiring -
Rough idle or stalls
Spark plugs faulty
Replace plugs 8-115
Ignition wiring faulty
Inspect wiring -
Incorrect ignition timing
Adjust ignition timing
8-111
Ignition coil faulty
Inspect ignition coil 8-116
Ignition faulty
Inspect igniter 8-120
High tension cord faulty
Inspect high tension 8-116
cord
Engine hesitates/poor
acceleration Spark plugs faulty Replace plugs 8-115
Ignition wiring faulty
Inspect wiring -
Incorrect ignition timing
Adjust timing 8-111
Poor gasoline mileage
Spark plugs faulty Replace plugs 8-115
Incorrect ignition timing Adjust ignition timing 8-111
Engine overheats Incorrect ignition timing
Adjust ignition timing
8-111 1 STB Revision

IGNITION SYSTEM - Distributor
DISTRIBUTOR
DISASSEMBLY AND REASSEMBLY
8-119
Disassembly steps
1. Breather
2. Distributor cap
3. Packing
4. Contact carbon
5. Rotor
6. Vacuum control
7. Ground wire
8. Lead wire
l + Adjustment of air gap
9. Igniter
4* 10. Rotor shaft
+*** 11. Signal rotor
l * 12. Breaker plate
4* 13. Spring retainer
4* 14. Governor spring
15. Governor weight
16. Lock pin
- Vehicles for
California
Vehicles except
for California
8
4**+ 17. Driven gear
18. Washer
19. “0” ring
20. Distributor shaft
21. Washer
22. Oil seal
23. Distributor housing
NOTE
(1) Reverse the disassembly procedures to reassemble.
(2) +e : Refer to “Service Points of Disassembly”.
(3) Hw: Refer to “Service Points of Reassembly”.
(4)
q : Non-reusable parts
lEL104 1 STB Revision

8-120 IGNITION SYSTEM - Distributor
6ELO6i
ti Pin punch
II
1ELlOi
SERVICE POINTS OF DISASSEMBLY
10. DISASSEMBLY OF ROTOR SHAFT/l 1. SIGNAL ROTOR
Place igniter base on soft base (wooden block) and lightly tap
rotor shaft to remove it from signal rotor.
13. DISASSEMBLY OF SPRING RETAINERI14. GOVERNOR
SPRING
Remove two spring retainers with pliers and then remove two
governor springs.
17. DISASSEMBLY OF DRIVEN GEAR
(1) Mark location of driven gear on distributor shaft.
(2) Place driven gear on soft base (wood block) so that spring
pin can be removed.
(3) Using a pin punch, remove spring pin.
INSPECTION
Check according to the following provisions and repair or replace
anything faulty.
CAP ROTOR
(1) Ensure there are no cracks in the cap.
(2) Ensure that the electrodes of the cap and of the rotor are
undamaged.
(3) Wipe off any dirt from the cap or the rotor.
SERVICE POINTS OF REASSEMBLY
Before servicing be sure to clean and inspect all parts.
1 STB Revision

IGNITION SYSTEM-Distributor 8-121
Distributor
w 6EL093
/” A
I -1-- Socket
17. REASSEMBLY OF DRIVEN GEAR Install
driven gear into distributor shaft at previously marked
location.
12. REASSEMBLY OF BREAKER PLATE Install igniter base to housing. Position the igniter base so that
the projection (A) fits into the groove (9).
11. REASSEMBLY OF SIGNAL ROTOR Install signal rotor to rotor shaft. Position the signal rotor so
that the dowel pin fits into the groove.
. ADJUSTMENT OF AIR GAP Adjust air gap between signal rotor and pick-up of igniter.
Standard value : 0.8 mm (.0315 in.)
1 STB Revision