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Remove the cover.
Check if there is any
freeplay on the Y.P.V.S.
cables.
No freeplay
Start the engine.
Does the water temperature
light blink three times in three
seconds?
Yes
With the engine running at idle
speed, check that there is freeplay
on the Y.P.V.S. cables.
No freeplay
Adjust the idle speed below 900
r/min.
The valve fully opens below
1,000 r/min.
Check that the water temperature
indicator light, lights up.
Does not light up
The Y.P.V.S. is ok. Adjust the
idle speed to specification.
•
If the valve is stuck, inspect it and then either remove any carbon or reassemble the valve, refer to the
"YAMAHA POWER VALVE SYSTEM (Y.P.V.S.)" in CHAPTER 5.
•
If the valve is not stuck, but the water temperature indicator light remains lit, refer to the "FAULT
LOCATION TABLE" in CHAPTER 8.
All manuals and user guides at all-guides.com
YAMAHA POWER VALVE SYSTEM
(Y.P.V.S.) PRE-SEASON CHECKS
Freeplay
The valve maybe stuck in
the fully-opened position
and the servo motor maybe
fully closed.
Change the water
No
temperature indicator light
bulb.
Freeplay
There is freeplay because the
valve is either stuck in the
half-or fully-opened position.
Does the water
temperature
Light up
indicator light blink
seven times in five
seconds?
No
Refer to "FAULT LOCATION
TABLE" in CHAPTER 8.
2-17
INSP
ADJ
Turn the pulley to remove
the freeplay.
Yes
If the valve is stuck
in the fully-closed or
half-opened position,
the diagnosis function
may indicate a faulty
servo motor.
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