Honda 2005 FOURTRAX FOREMAN TRX500 TM Service Manual page 364

IGNITION SYSTEM
SERVICE INFORMATION
GENERAL
• Some electrical components may be damaged if terminals or connectors are connected or disconnected while the igni-
tion switch is ON and current is present.
When servicing the ignition system, always follow the checks in the troubleshooting on page 19-4.
This vehicle's Ignition Control Module (ICM) is built into the ECM.
The ignition timing cannot be adjusted since the ECM is factory preset.
The ECM may be damaged if dropped. Also, if the connector is disconnected when current is flowing, the excessive
voltage may damage the ECM. Always turn off the ignition switch before servicing.
A faulty ignition system is often related to poor connections. Check those connections before proceeding.
Use a spark plug of the correct heat range. Using spark plug with an incorrect heat range can damage the engine.
For ignition switch inspection, see page 21-7.
For engine stop switch inspection, see page 21-8.
For ignition pulse generator (alternator stator) removal/installation, see page 11-7.
SPECIFICATIONS
ITEM
Spark plug
Spark plug gap
Ignition coil primary peak voltage
Ignition pulse generator peak voltage
Ignition timing ("F" mark)
SPECIFICATIONS
BKR5E-11 (NGK), K16PR-U11 (DENSO)
1.0-1.1 mm (0.039-0.043 in)
100 V minimum
0.7 V minimum
10° BTDC at idle
TORQUE
Timing hole cap 10 N-m (1.0 kgf-m, 7 Ibf-ft)
TOOL
Peak voltage adapter
07HGJ-0020100
(not available in U.S.A.) with
commercially available digital
multitester (impedance 10 M Q/DCV
minimum)
Ignition Mate Peak Voltage Tester
MTP07-0286
(U.S.A. only)
Pin probe (Male)
07ZAJ-RDJA110
19-3