Weak Or No Spark - Honda 1988 Z50R Service Manual

TROUBLESHOOTING
WEAK OR NO SPARK
1.
2.
3.
4 .
5.
CAUSE
Try spark test with known good
sprk plug
WEAK OR NO SPARK
I
Check spark plug wire for loose
or poor contact at the spark plug
cap, then try spark test again.
WEAK OR NO SPARK
I
Check ignition control module
(tCM) connector for loose or
poor contact.
NORMAL
PROBABLE CAUSE
GOOD SPARK----_ _ _ __
~
.. Faulty spark plug
GOOD SPARK
---------~
•• Loose or poor contact of spark plug
wire
ABNORMAl----------___ Loose or poor contact of ignition
control module
(teM)
connector
Che!k the resistances or continuity at the ignition control module
(leM)
con nector of the wife harness side (See page 13-2J.
+
ABNORMAL
NORMAL
+
chetk part of abnormal line
(See page 13·2,3)
7. Try with a known good ignition coil.
GOOD SPARK WEAK OR NO SPARK
t t
NORMAL Faulty ignition coil
Faulty ignition control module (lCM)
I
6. Check the wire harness for open - -
ABNORMAl----------~.~ ~')
Faulty part
or short circuit between the (21 Faulty wire harness
ignition control module (lCM)
( 152)
N O R M A l - - - - - - - - - - - - - - - - - - - -_ .. loose or poor contact of connectors
on ignition related parts
15-5