FI SYSTEM/ CVT SYSTEM 6-53
“C55” CVT ENGINE REVOLUTION SIGNAL CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
The CVT engine revolution signal is not input to
CVT control unit from ECM at speed of 20 km or
higher.
• Lead wire open or short.
• ECM malfunction.
• CVT control unit malfunction.
• Remove the front panel. (
:
9-8)
• Place the motorcycle on the center stand and put the side
stand in.
1
OK
NG
;
CVT engine revolution signal: Approx. 2.5 V
(
+
Br/W –
-
Ground)
z
09900-25008: Multi circuit tester
u
Tester knob indication: Voltage (
-
)
Short circuit in the Br/W
lead wire.
Loose or poor contacts.
ECM malfunction.
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
3
(Br/W) wire of the CVT
control unit coupler.
Start the engine and measure the signal voltage between
+
Br/W (
3
) wire and
-
Ground.
NOTE:
Do not need to disconnect any couplers.
Loose or poor contacts on the CVT control unit
couplers.
CVT control unit malfunction.
CVT control unit coupler
CVT control unit coupler
Br/W
ECM couplers
VV
3
O
3
1
1
1
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