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ELEC
Å
ı
ELECTRICAL ANALYSIS
Peak voltage measurement
NOTE:
When checking the condition of the igni-
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tion system it is vital to know the peak
voltage.
Cranking speed is dependant on many
G
factors (e.g., fouled or weak spark plugs, a
weak battery). If one of these is defected,
the peak voltage will be lower than speci-
fication.
If the peak voltage measurement is not
G
within specification the engine will not
operate properly.
A low peak voltage will also cause compo-
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nents to prematurely wear.
Peak voltage adaptor
NOTE:
Throughout this chapter the peak voltage
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adaptor's part number has been omitted.
Refer to the following part number.
The peak voltage adaptor should be used
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with the digital circuit tester.
Peak voltage adaptor:
YU-39991/90890-03169
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When measuring the peak voltage, con-
nect the peak voltage adaptor to the digi-
tal tester and switch the selector to the
DC voltage mode.
NOTE:
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Make sure that the adaptor leads are
properly installed in the digital circuit
tester.
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Make sure that the positive pin (the "+"
mark facing up as shown) on the adaptor
is installed into the positive terminal of
the tester.
The test harness is needed for the follow-
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ing tests.
Å Voltage measurement
ı Peak voltage measurement
7-9
E
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