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Control functions
ESU10514
Coolant temperature warning
indicator " "
If the engine overheats, the coolant tempera-
ture warning indicator and the warning light
come on. When this occurs, stop the engine
immediately and allow the engine to cool
down, and then check the coolant level in the
coolant reservoir. (See page 76 for checking
procedures.)
RST90TF / RST90TFL / RST90TFY
1. Coolant temperature warning
indicator "
"
2. Warning light "
RST90
1. Coolant temperature warning
indicator "
"
2. Warning light "
ECS00042
NOTICE
Do not continue to operate the engine if it
is overheating.
22
"
"
ESU13813
Electric power steering warn-
ing indicator "EPS" (RST90TF /
RST90TFL / RST90TFY)
The electric power steering warning indicator
comes on when the key is turned to the on
position, and then goes off once the engine is
started. If the warning indicator remains on or
comes on after the engine is started, the EPS
system may not be working correctly. When
this occurs, have a Yamaha dealer check the
EPS system.
1. Electric power steering warning indicator
"EPS"
TIP
If the steering load is too heavy (i.e., exces-
sive steering use when the snowmobile is
traveling at a slow speed), the power assist is
reduced to protect the EPS motor from over-
heating.
ESU13772
Self-diagnosis device
This model is equipped with a self-diagnosis
device for various electrical circuits.
If a problem is detected in any of those cir-
cuits, the warning light and the engine trouble
warning indicator flash, and an error code
displays (RST90TF / RST90TFL / RST90TFY)
or flashes slowly (RST90) in the meter dis-
play. Note the error code, and then have a
Yamaha dealer inspect the snowmobile as
soon as possible. NOTICE: Do not continue
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