'61HN252' by American Honda Motor Co. - Page 419 of 540
http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
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3/9/2008 11:20 PM
[2005-2008] [TRX500 FA/FGA]
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 steps in the troubleshooting table on
page 20-4.
· This vehicle's Ignition Control Module (ICM) is built in the engine control module (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.
· Make sure the battery is adequately charged. Using the starter motor with a weak battery results in a slower engine
cranking speed as well as no spark at the spark plug.
· This vehicle's spark plug is equipped with iridium type electrode. Do not use any spark plug other than specified.
·
11-8
for ignition pulse generator removal/installation.
·
See page 22-9
for ignition switch servicing.
·
See page 22-10
for engine stop switch inspection.
·
See page 22-22
for reverse switch servicing.
·
See page 24-37
for gear position switch servicing.
SPECIFICATION
ITEM
SPECIFICATIONS
Spark plug
Standard
IJR7A9 (NGK), VX22BC (DENSO)
For cold climate (below 5°C/41°F)
IJR6A9 (NGK), VX20BC (DENSO)
Spark plug gap
0.8
0.9 mm (0.03
0.04 in)
Ignition coil primary peak voltage
100 V minimum
Ignition pulse generator peak voltage
0.7 V minimum
15° BTDC at idle
Ignition timing (``F`` mark)
TORQUE VALUES
Timing hole cap
10 N·m (1.0 kgf·m, 7 lbf·ft)
TOOLS
Peak voltage adapter
Ignition Mate peak voltage tester
07HGJ-0020100
MTP07-0286
(not available in U.S.A.) with com-
(U.S.A. only)
mercially available digital multime-
ter (impedance 10 M
Ω
/DCV
minimum)
20-3