1997 MITSUBISHI TRITON Workshop Manual

ENGINE ELECTRICAL ± Ignition System16-38
WAVEFORM OBSERVATION POINTS
Point A: The height, length and slope of the spark line (refer to abnormal waveform examples 1, 2,
3 and 4) show the following trends.
Spark linePlug gapCondition of
electrodeCompression
forceConcentration of
air mixtureIgnition timingHigh tension
cable
LengthLongSmallNormalLowRichAdvancedLeak
ShortLargeLarge wearHighLeanRetardedHigh
resistance
HeightHighLargeLarge wearHighLeanRetardedHigh
resistance
LowSmallNormalLowRichAdvancedLeak
SlopeLargePlug is fouled±±±±
Point B: Number of vibration in reduction vibration section
(Refer to abnormal waveform example 5)
Number of vibrationsCoil, condenser
3 or higherNormal
Except aboveAbnormal
Point C: Height of Zener voltage
Height of Zener voltageProbable cause
HighProblem in Zener diode
LowAbnormal resistance in
primary coil circuit

W
ave c h ara cte ris tic s C
ause o f p ro ble m E
xa m ple 1 S
park lin e is h ig h a nd s h ort. S
park p lu g g ap is to o la rg e. E
xa m ple 2 S
park lin e is lo w a nd lo ng, a nd is
s lo pin g.
A ls o , th e s e co nd h alf o f th e s p ark lin e
i s d is to rte d. T his c o uld b e a r e su lt o f
m is fir in g. S
park p lu g g ap is to o s m all. E
xa m ple 3 S
park lin e is lo w a nd lo ng, a nd is
s lo pin g. H ow eve r, th ere is a lm ost n o
s p ark lin e d is to rtio n. S
park p lu g g ap is fo ule d. E
xa m ple 4 S
park lin e is h ig h a nd s h ort. S
park p lu g c a ble is n early fa llin g o ff .
( C ausin g a d ual ig nit io n) E
xa m ple 5 N
o w ave s in w ave d am pin g s e ctio n L
aye r s h ort in ig nit io n c o il

D
IS TR IB UTO R 16300200140
R EM OVA L A ND IN STA LLA TIO N 1
0 N m 1
3 N m 2
4 N m

T
im in g m ark M
atin g m ark s

ENGINE ELECTRICAL ± Glow System16-44
SERVICE SPECIFICATIONS16400030025
ItemStandard value
Resistance between glow plug plate and glow plug body
(parallel resistance for 4 glow plugs) (at 20
C) W0.10 ± 0.15
Voltage between glow plug plate and
glow plug body VImmediately after igni-
tion switch is turned to
ON (without starting
the engine)9 ± 11 (Drops to 0 V after 4 ± 8 seconds have passed)
While engine is crank-
ing6 or more
While engine is warm-
ing up12 ± 15 (Drops to 0 V when the engine coolant
temperature increases to 60
C or more or if 180
seconds have passed since the engine was started)
Glow plug resistance (at 20
C) W0.4 ± 0.6
SEALANT16400050021
ItemSpecified sealantRemark
Engine coolant temperature sensor3M Nut Locking Part No.4171 or equivalentDrying sealant

O
N-V EH IC LE S ER VIC E 16400100023
S ELF-R EG ULA TIN G G LO W S YSTE M C HEC K
1 . Check th at th e b atte ry v o lt a ge is 1 1 ± 1 3 V .
2 . Check th at th e e ngin e c o ola nt te m pera tu re is 4 0
C o r
l e ss.
N O TE
I f th e e ngin e c o ola nt te m pera tu re is to o h ig h, d is co nnect
t h e e ngin e c o ola nt te m pera tu re s e nso r c o nnecto r.
3 . Measu re th e r e sis ta nce b etw een th e g lo w p lu g p la te a nd
t h e g lo w p lu g b ody ( e arth ).
S ta n dard v alu e: 0 .1 0 ± 0 .1 5 W ( a t 2 0
C )
N O TE
T he r e sis ta nce v a lu e is th e p ara lle l r e sis ta nce v a lu e fo r
t h e fo ur g lo w p lu gs.
4 . Connect a v o lt m ete r b etw een th e g lo w p lu g p la te a nd
t h e g lo w p lu g b ody ( e arth ).
5 . Measu re th e v o lt a ge im media te ly a fte r th e ig nit io n s w it c h
i s tu rn ed to O N ( w it h out s ta rtin g th e e ngin e).
S ta n dard v alu e:
9 ± 1 1 V ( D ro ps t o 0 V a fte r 4 ± 8 s eco nds h ave
p assed )
I n a ddit io n, c h eck to b e s u re th at th e g lo w in dic a to r la m p
( re d) illu m in ate s im media te ly a fte r th e ig nit io n s w it c h is
t u rn ed to O N.
N O TE
T he tim e d urin g w hic h th e v o lt a ge a ppears ( e nerg iz in g
t im e) w ill d epend o n th e e ngin e c o ola nt te m pera tu re .
6 . Measu re th e v o lt a ge w hile th e e ngin e is c ra nkin g.
S ta n dard v alu e: 6 V o r m ore
7 . Sta rt th e e ngin e a nd m easu re th e v o lt a ge w hile th e e ngin e
i s w arm in g u p.
H ow eve r, if th e e ngin e c o ola nt te m pera tu re r is e s a bove
6 0
C o r w hen 1 80 s e co nds h ave p asse d s in ce th e e ngin e
w as s ta rte d, th e v o lt a ge w ill a lw ays r e tu rn to 0 V . ( R efe r
t o th e G lo w P lu g E nerg iz a tio n T im in g C hart.)
S ta n dard v alu e: 1 2 ± 1 5 V (
± )