Honda CB900F Service Manual page 391

ELECTRIC STARTER
TROUBLESHOOTING
Starter motor does not turn
Check for a blown mai n or sub fuse before servicing.
• Make sure the battery is fully charged and in good condition.
Faul ty starter re ay
switch (page 18- 101
I
,
CLICK not hea rd
Check the starter relay switch ope rat ion.
"C LICK" hea rd
Apply battery vo ltage to the st arter m ot or direct-
You should hear the relay "C LICK" when th e Iy and check th e ope ration .
starter switch button is dep ressed .
1
Norm al
I
Abn ormal
, ,
.
Poor ly connected
.
Fault y starter m ot or
starter m ot or cab le
(page 18-4)
" "
.
I
A bnorm al
Disconnect the starter relay switch connector,
1-- -"= = ="-- ...
Fau lty neutral switch (page 19-201
and check t he relay coil g round w ire lines as Fau lty neutral diode
below for continuity: Fau lty clutch switch
1. Green/red ter mina l-clutch switch di ode-nee- Faul ty clutch/side sta nd d io de
tral switch line (wit h the transmission in ne u- Faul ty sid e stand switch
tral and clutc h lever released). Loose or poo r co ntact con necto r
2. Green/re d te rminal/clutch switc h-side stand Open circuit in w ire harn ess
sw itc h line (i n any gea r exce pt neu tral, and
wit h t he clu t ch leve r pulled in an d th e side
stand up .I
Normal
I
,
Connect the starter relay switch connector.
W ith the ignition switch ON and the starter
switch pushed, measure the starter relay volt-
age at the starter switch connector (between
Yellow/red 1+) and g round H .
I .
Batter y v olt age reg istered
I
No voltage
Faulty ignition switch
Faul ty starter switch
Blo w n out main o r sub-fuse
Loose or poor co ntact o f co nnector
Op en ci rcuit in w ire ha rne ss
Norma l
Check the starter relay switch operation.
L ~~~~~~~~::"~~~~~~~
__
--.1- - --'=="-'-- -- " .
Loose or poor contact st art er relay sw itch
co nnector
Abnormal
L . . .
Faulty starter relay switch
18-2