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10.3.3.
DI Primary
Measures and compares the ignition waveforms for all cylinders on standard Distributor ignition
systems.
Path:
DI PRIMARY
BLACK TO ENGINE CHASSIS
RED TO NEGATIVE SIDE OF
THE IGNITION COIL
10.3.4.
DI Secondary
Measures and compares distributor ignition secondary waveforms.
* You need optional capacitive pick-up to measure DI Secondary.
Path:
DI SECONDARY
CONNECT THE CAPACITIVE
PICKUP AND INDUCTIVE
PICKUP
Normal DI Primary waveform
Normal DI Secondary waveform
10-22
DI Primary
Look for abnormally long or short
dwell periods in the waveform.
DI Secondary
Compare measured waveform
with reference waveform.
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