Honda TRX400EX FOURTRAX 1999, Service Manual

Page: 234 / 263

IGNITION SYSTEM
NOTE:
Check that the cylinder compression is normal and
the spark plug is installed correctly i n the cylinder
head.
Disconnect the ignition control module connec-
tors.
Connect the peak voltage tester or adaptor probes to
the connector terminals of the wire harness side.
CONNECTION:
EXCITER COIL PEAK VOLTAGE
ICM CONNECTORS
Turn the ignition switch ON.
Crank the engine with the starter motor and read the
peak voltage.
PEAK VOLTAGE: V minimum
Avoid touching the spark plug and tester probes
t o
prevent electric shock.
If the voltage measured at ICM connector is abnor-
mal, measure the peak voltage at the exciter coil con-
nector.
Remove the fender (page
2-2).
Disconnect the exciter coil connector and connect the
peak voltage tester or adaptor probes to the alterna-
tor side connector terminal and ground.
In the same manner as at the ICM connectors, mea-
sure the peak voltage and compare it to the voltage
measured a t the ICM connectors.
If the peak voltage measured a t the ICM connec-
tors is abnormal and the one measured at the
exciter coil connector
is
normal, the wire
has an open or short circuit, or loose connections.
If both peak voltages are abnormal, follow the
checks described in the troubleshooting on page
See section 10 for alternator stator replacement.
Install the fender (page
16-4