Mitsubishi Eclipse Workshop Manual page 231

IGNITION SYSTEM
-
Service
Adjustment
Procedures
16-19
o
o
Observation Conditions (Only PATTERN SELECTOR below changes
from
the above conditions.!
PATTERN SELECTOR
DISPLAY
No.
4 (or No.
1)
Primary
ignition
voltage waveform
Neutral
section
Waneform observation Points
Point
A
:
The height, length and slope of the spark line (refer to abnormal waveform examples
1,2,3and
4)
Point B :
Number
of
vibrations
in
reduction vibration section
(Refer to
abnormal waveform example
b)
Number
of
vibrations
Coil, condenser
3 or
higher
Except
above
Normal
Abnormal
Point
C
Height
of
Zener voltage
(v)
100
No.
I
(or
No
cylinder
4l
No.
3 (or No. 2l
cylinder
ignition noise
I
I
l
I
o
o
o
I
o
t
show the following
trends.
Spark line
Plug gap Condition of
electrode
Compression
force
Concentration of
air
mixture
lgnition timing {igh tension
cablc
€
o,
c
0)
J
Long Small
Normal Low
Rich
Advanced
Leak
Short
Large Large wear
High
Lean
Retarded High resistance
t
CD
'6
High Large
Large wear
High
Lean
Retarded High
resistance
Low
Small Normal Low
Rich Advanced
Leak
Slope Large
Plug is
fouled
Height
of
Zener voltage
Probable cause
High
Low
Problem in
Zener diode
Abnormal resistance
in
primary coil circuit
O
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Apr.
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