Ignition Systems Connection; Ignition Systems Service Information; Ignition Systems Troubleshooting; 23. Ignition Systems - Honda Motorcycle Service Manual

23. IGNITION SYSTEMS
SERVICE INFORMATION 23-1 IGNITION SYSTEM INSPECTION
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TROUBLESHOOTING
(PEAK VOLTAGE MEASUREMENT
23-1 METHOD) 23-1 3
SYSTEM DESCRIPTIONS
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IGNITION COIL 23- 17
SPARK TEST
23-11 SIDE STAND IGNITION CUT-OFF
IGNITION TIMING 23-12 SWITCH 23-19
SERVICE INFORMATION
GENERAL
a Follow the steps described in the troubleshooting flow chart when servicing the ignition system.
a The CDI and transistorized ignition system use an electrically controlled ignition timing sysytem.
No adjustments can be made to the ignition timing.
a For multi-cylinder engines, a rough diagnosis can be made by identifying the cylinder whose spark timing is incorrect.
a The ignition control module may be damaged if dropped. Also, if the connector is disconnected when current is flowing,
excessive voltage may damage the unit. Always turn off the ignition switch before servicing.
A faulty ignition systm is often related to poorly connected connectors. Check those connections before proceeding.
a For models with an electric starter, make sure the battery is adequately charged. Using the starter motor with a week
battery results in a slower engine cranking speed as well as a weak spark at the spark plugs.
Use spark plugs of the correct heat range. Using spark plugs with an incorrect heat range can damage the engine.
Refer to chapter 2 for servicing spark plugs.
TROUBLESHOOTING
The explanations in the following troubleshooting charts are based on a general-type CDI and transistorized ignition
system. In case of special-type devices, the inspection sequences and procedures may be different. Refer to the Model
Specific manual for detail information.
Before troubleshooting, check that no spark jumps at the spark plug using a known good spark plug (to ensure that the
plug does not cause the problem).
Moreover, check for proper spark plug gap and loose spark plug wire as well as for leakage of the ignition coil secondary
current caused by moisture.
a
If no spark jumps at one cylinder or one part of the ignition system on multi-cylinder engines, exchange the ignition coil
with the other good one and perform the spark test. If good sparks jump, the exchanged ignition coil is faulty.
@
AS for peak voltage inspection, first measure the primary coil voltage of the ignition coil. If the voltage is abnormal, check
each item in numerical order in the "Probable Cause" column described on the Troubleshooting chart.
Date of Issue: March.1995
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HONDA MOTOR CO.,LTD.
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