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Ignition Coil Primary Peak Voltage Check; Ic Igniter Inspection - Kawasaki KX450F Service Manual

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Ignition System

Ignition Coil Primary Peak Voltage Check

Remove the spark plug cap from the spark plug, but do
not remove the spark plug.
When removing the spark plug cap, do not pull the
lead. The lead could be broken off or damaged the
wires inside.
Install the good spark plug [A] to the spark plug cap, then
touch the frame with it.
Measure the voltage with each lead connected cor-
rectly.
The correct value may not be obtained if
disconnected.
Maintain the correct value of compression pressure for
the cylinder (Be sure to measure the voltage with the
spark plug installed to the cylinder head.)
Connect the peak voltage adapter [B] to a digital meter.
Special Tools - Peak Voltage Adapter: 57001-1415
Type: KEK-54-9-B
Needle Adapter Set: 57001-1457
Connect the peak voltage adapter to the ignition coil ter-
minal and ground.
Connections:
Ground [C]
Terminal (O
Lead) [D]
Ignition Coil [E]
ECU [F]
Needle Adapter [G]
Shift the gear to the neutral position.
Crank the engine by kicking the pedal several times to
measure the peak voltage of the ignition coil.
Ignition Coil Primary Peak Voltage
Standard:
150 V or more
Electrical equipment can cause serious electrical
shock. To avoid being shocked, do not touch the
metal portion of the probe when measuring voltage.
If the voltage is less than the specified value, see the
Troubleshooting on next page.

IC Igniter Inspection

The IC igniter is built in the ECU.
Refer to the following items.
Ignition System Troubleshooting (see Ignition System
section)
ECU Power Supply Inspection (see ECU Power Supply
Inspection in the Fuel System (DFI) chapter)
NOTICE
NOTE
Peak Voltage
Adapter
BK lead
R lead
WARNING
ELECTRICAL SYSTEM 16-23
Digital
Meter
(–)
(+)

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