C55" Cvt Engine Revolution Signal Circuit Malfunction - Suzuki AN650 2002 Service Manual

"C55" CVT ENGINE REVOLUTION SIGNAL CIRCUIT MALFUNCTION

DETECTED CONDITION
The CVT engine revolution signal is not input to
CVT control unit from ECM at speed of 20 km or
higher.
INSPECTION
• Remove the front panel. (
• Place the motorcycle on the center stand and put the side
stand in.
1
Check the ECM and CVT control unit couplers for loose
or poor contacts.
If OK, check the CVT engine revolution signal.
Insert the copper wire to the
control unit coupler.
Start the engine and measure the signal voltage between
+ 3
Br/W ( ) wire and
NOTE:
Do not need to disconnect any couplers.
;
CVT engine revolution signal: Approx. 2.5 V
z
09900-25008: Multi circuit tester
u
Tester knob indication: Voltage (
OK
Loose or poor contacts on the CVT control unit
couplers.
CVT control unit malfunction.
:
9-8)
3
(Br/W) wire of the CVT
-
Ground.
+
( Br/W –
-
)
NG
Short circuit in the Br/W
lead wire.
Loose or poor contacts.
ECM malfunction.
POSSIBLE CAUSE
• Lead wire open or short.
• ECM malfunction.
• CVT control unit malfunction.
1
1
-
Ground)
1
FI SYSTEM/ CVT SYSTEM 6-53
3
CVT control unit coupler
V V
CVT control unit coupler
3
Br/W
O
ECM couplers