Ignition System Operation; Cdi System Integrated With Side Stand Switch And/Or Neutral Switch - Honda Motorcycle Service Manual

IGNITION SYSTEMS
IGNITION SYSTEM OPERATION
C D I System Integrated With Side Stand Switch And/or Neutral Switch
CDI Systems integrated witn a s dc stand swlrch an0 a neutra sw tch operate smilar to otner CDI sysrems except that the
i g n i o n conrro m0dJ e a
SO
contra
s
the c'rc~mstances tnat allow ~ g n i t i o r ttiro-gn an nterface an0 transstor.
The interface determines whether to turn the transistor on or off.
The transistor determines how the ignition control circuit works by turning the SCR (thyristor) o n or off
The interface receives information through the external detection circuit consisting of the side stand and neutral switches.
A diode in this circuit prevents current from flowing in the reverse direction. This circuit must have a ground path for ignition
to be possible.
lgnition is not possible if both of the following conditions occur:
(a) side stand is lowered
(b) transmission is in gear
Models without transmissions, (such as scooters), do not have neutral switch or clutch circuits and therefore condition (b)
does not apply.
Example Of A Circuit For Models With Manual Cluthflransmission
EXCITER COIL
IGNITION PULSE
GENERATOR
FUSE
Under conditions
(a)
and (b). the interface in the ignition
When :
control module is activated and sends the base signal to the
- t h e side stand is retracted and
transistor and the transistor is turned ON.
t h e transmission is
laced
in neutral
lgnition Is Not Possible
TO NEUTRAL INDICATOR
1
ignition is possible
When the transistor is turned ON, it conducts the gate sig-
nal from the trigger t o ground. Therefore, the SCR (thyri-
stor) cannot be turned on and the ignition is not possible.
Date of Issue
:
March. 1995
0
HONDA MOTOR CO.,LTD.
23-23
the transistor is turned OFF as the interface is deactivated.
~ h ~ ~ ~ f ~ ~ ~ , the gate signal from the trigger can be applied to
the
SCR and ignition is possible,