Honda Activa SCV110, Service Manual Digest

Page: 197 / 230

16-3
IGNITION SYSTEM
IGNITION SYSTEM INSPECTION
• If not spark jumps at the plug, check all connections
for loose or poor contact before measuring each peak
voltage.
• Use a commercially available digital multimeter (im-
pedance 10 M
Ω
/DCV minimum).
• The display value differs depending upon the internal
impedance of the multimeter.
• If the Imrie diagnostic tester (model 625) is used, fol-
low the manufacturer’s instructions.
Connect the peak voltage adaptor to the digital multim-
eter.
TOOL:
Imrie diagnostic tester (model 625) or
Peak voltage adaptor
070GJ – 002I110
with commercially available digital multimeter
(impedance 10 M
Ω
/DCV minimum)
GOOD KNOWN SPARK PLUG
PEAK VOLTAGE ADAPTOR
DIGITAL MULTIMETER
IGNITION PRIMARY PEAK VOLTAGE
• Check all system connections before this inspection.
Poor connected connectors can cause incorrect read-
ings.
• Check that the cylinder compression is normal and
check that the spark plug is installed correctly in the
cylinder head.
Lift up the body cover (page 2-3).
Disconnect the spark plug cap from the spark plug.
Connect a good known spark plug to the spark plug cap
and ground the spark plug to the cylinder head as done
in a spark test.
With the connector connected, connect the peak voltage
adaptor probes to the ignition coil primary terminal and
ground.
CONNECTION:
Black/yellow wire terminal (–) — body ground (+)
Turn the ignition switch ON.
Crank the engine with the kickstarter and read the igni-
tion coil primary voltage.
PEAK VOLTAGE: 100 V minimum
Avoid touching the spark plug and tester probes to
prevent electric shock.
If the peak voltage is lower than the standard value,
follow the checks described in the troubleshooting on
(page 16-2)
.
IGNITION COIL