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ENGINE ELECTRICAL - lanition Svstem
IGNITION SECONDARY VOLTAGE WAVE-FORM
CHECK
MEASUREMENT METHOD
(1) Clamp SECONDARY PICKUP around spark plug cable.
NOTE
1. The ignition voltage peak appears reversely between
when the spark plug cables of the cylinders No.4,
No. 5 and No. 6 are clamped and when those of the
cylinders No. 1, No. 2 and No. 3 are clamped.
2. Since the 2-cylinder simultaneous ignition system is
employed, the wave-form for two cylinder appears
group by group when the wave-form is observed.
(Cylinder No. 1 - cylinder No. 4, cylinder No. 2 -
cylinder No. 5 and cylinder No. 3 - cylinder No. 6
as the respective groups) Here, the wave-form is
observed for the cylinder whose spark plug cable is
clamped with the secondary pickup.
(2) Clamp the spark plug cable with the trigger pickup.
NOTE
No. 2 or No. 3 which belongs to the same group of
the cylinders clamped with the secondary pickup.
2. Though it is difficult to isolate the cylinder of the
wave-form, the wave-form of the cylinders clamped
with the secondary pickup is stable. Use this as a
reference for isolation.
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