19
N Y
N
Y
Y N
Y N
Failure Diagnosis
Diagnosis on failure or difficulty in starting engine
Failure or difficulty in starting engine
Check ignition system
Remove the spark plug and check whether there is
carbon fouling between electrode.
Sparkover test for spark plug Eliminate carbon fouling
Weak spark or no spark between electrode Large blue or bluish purple spark between electrode
Screw off spark plug cap and conduct
sparkover test for high-voltage line
Check whether ignition is timely conducted with
an ignition timing lamp
Large blue spark Weak spark or no spark
Check whether spark plug and cap are in
good condition
Check power
supply for
ignition
Check whether
short circuit or
open circuit
occurs to
ignition coil
Check whether
short circuit or
open circuit occurs
inside the ignition
system
Check whether
CDI ignition
device is in
good condition
Check the compression