Ignition System - Honda TRX400EX FOURTRAX 1999 Service Manual

SERVICE INFORMATION
TROUBLESHOOTING
IGNITION SYSTEM INSPECTION
SERVICE INFORMATION
GENERAL
CAUTION:
Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni-
ON
tion switch is and current is uresent.
When servicing the ignition system, alwaysfollow the steps in the troubleshooting on page 16-2.
The ignition timing cannot be adjusted since the ignition control module (ICM) is factory preset.
The ICM may be damaged if dropped. Also, if the connector is disconnected when current is flowing, the excessive
voltage may damage the ICM. Always turn off the ignition switch before servicing.
A faulty ignition system is often related to poor connections. Check those connections before proceeding.
of
Use a spark plug
For ignition switch and engine stop switch inspection, see section 18.
For exciter coil and ignition pulse generator (alternator stator) removallinstallation, see section 10.
SPECIFICATIONS
Spark plug
Spark plug gap
Ignition coil primary peak voltage
Exciter coil peak voltage
Ignition timing ("F" mark)
TOOL
Peakvoltage tester
Peak voltage adaptor
. -
the correct heat range. Using spark plug with an incorrect heat range can damage the engine.
ITEM
Standard
only) or

16. IGNITION SYSTEM

16-1 IGNITION COIL
IGNITION CONTROL MODULE (ICM)
16-2
16-3 IGNITION TIMING
I
0.6
- 0020100 (not available in U.S.A.) with commercially available digital
SPECIFICATIONS
- -
0.7 mm (0.024 0.028 in)
V
100 minimum
0.7 V minimum
V
100 minimum
8" BTDC a t idle
16-6
16-6
16-7
16-1