94
IGNITION SYSTEM
TROUBLESHOOTING
TROUBLESHOOTING
Perform the following ignition system tests when engine is hard to start to determine if the cause is in the
ignition or other system.
START
Check spark condition
(Set tester gap at 5/16)
Check if the spark plug is in good condition
(Refer to
Disconnect the engine stop switch
(Green & Black or Blue/Red & Black)
Check ignition coil resistance
(Refer to page 97).
Primary: 0.17 – 0.23
Ω
Secondary: 4.8 – 7.2 k
Ω
Check spark plug cap for any evidence of
high-tension leak.
Check spark plug cap resistance.
Cap resistance: 8 – 12 k
Ω
Check power source coil resistance.
(Refer to page 95).
Coil resistance: 20.0 – 31.0
Ω
Check the crankshaft position sensor
(Refer to page 96).
OK
OK
OK
OK
OK
No or weak sparks
No or weak sparks
Sparks
Check ignition timing by
using timing light.
(2° BTDC at 1000 RPM)
Sparks
NO
Out of Spec.
NO
Out of Spec.
Out of Spec.
Out of Spec.
Replace the spark plug with new one.
Check and/or replace the engine stop switch.
(Refer to page 98).
Replace the ignition coil
Replace the spark plug cap.
Replace the spark plug cap.
Replace the coil
Replace the sensor.
NO
OK
Replace CDI unit.
