44
0.07
B
F12R L.C. 50 cc.
Signalling System
Chapter
paGe
ISSUe
If the instrument board (speedometer function) is not functioning correctly, check:
1) VOLtaGe DeLIVereD tO reV COUNter SeNSOr
) SIGNaL SeNt tO INStrUMeNt BOarD
3) CONtINUItY OF WhIte CaBLe
1. Voltage delivered to rev counter sensor
- Disconnect three-way connector of rev counter sensor.
- Connect
Tester (20 V dc)
to connector,
as follows:
- terminal (+) of tester
Yellow/blue cable
(1)
.
- terminal (-) of tester
Black cable
(2)
.
- turn key
“ON”.
- Voltage delivered to rev counter sensor:
5
±0.5
V.
- Not compliant:
check continuity of black cable
(-)
and of yellow/blue cable
(+5V),
(see wiring diagram).
- If cables are in good repair, replace digital instrument board.
F. 6
Tester (dc 20 V)
N
B
N
BL
B
GL
-BL
2
1