2002 Yamaha Motorsports SRX700 Owners Manual - Page 22

2002 Yamaha Motorsports SRX700 Manual

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ESU00296 "D.C.S." (Detonation Control System) indicator light This snowmobile is equipped with a system which is able to detect and control engine detonations in order to protect the engine from damage. The "D.C.S." indicator light 1 flashes to inform the rider that the detonation control system has been activated. After the engine starts, the "D.C.S." indicator light flashes three times to check the bulb, and then goes off if there are no problems. (See page 5-6 for "D.C.S." indicator light flash pattern number 0.) If it does not flash, have a Yamaha dealer inspect the electrical circuit. If a detonation is detected by the knock sensor, the system automatically adjusts the ignition timing for optimal firing, and the "D.C.S." indicator light flashes. The system helps protect the engine from detonation damage while the light is flashing. (See page 5-6 for "D.C.S." indicator light flash pattern numbers 1 and 2.) NOTE: @ G G @ If the detonation level increases, the "D.C.S." indicator light flash pattern changes from pattern number 1 to pattern number 2, and the ignition timing is further adjusted. If excessive detonation levels continue, maximum engine speed is reduced to protect the engine. Engine performance will decline according to the detonation level. After detonation stops, the engine protection control is deactivated, and the "D.C.S." indicator light goes off. NOTE: @ G G G @ Use premium gasoline only, otherwise detonations may occur. (See page 6-1 for more details.) If the carburetor settings are not appropriate for the operating conditions, detonations may occur. If the "D.C.S." indicator light flashes continuously, it is recommended to consult a Yamaha dealer. 5-5

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5-5
ESU00296
“D.C.S.” (Detonation Control System) indicator
light
This snowmobile is equipped with a system which is able
to detect and control engine detonations in order to pro-
tect the engine from damage.
The “D.C.S.” indicator light
1
flashes to inform the rider
that the detonation control system has been activated.
After the engine starts, the “D.C.S.” indicator light flashes
three times to check the bulb, and then goes off if there
are no problems. (See page 5-6 for “D.C.S.” indicator
light flash pattern number 0.)
If it does not flash, have a Yamaha dealer inspect the
electrical circuit.
If a detonation is detected by the knock sensor, the sys-
tem automatically adjusts the ignition timing for optimal
firing, and the “D.C.S.” indicator light flashes. The system
helps protect the engine from detonation damage while
the light is flashing. (See page 5-6 for “D.C.S.” indicator
light flash pattern numbers 1 and 2.)
NOTE:
@
●
If the detonation level increases, the “D.C.S.” indica-
tor light flash pattern changes from pattern number 1
to pattern number 2, and the ignition timing is further
adjusted. If excessive detonation levels continue,
maximum engine speed is reduced to protect the
engine.
●
Engine performance will decline according to the det-
onation level.
@
After detonation stops, the engine protection control is
deactivated, and the “D.C.S.” indicator light goes off.
NOTE:
@
●
Use premium gasoline only, otherwise detonations
may occur. (See page 6-1 for more details.)
●
If the carburetor settings are not appropriate for the
operating conditions, detonations may occur.
●
If the “D.C.S.” indicator light flashes continuously, it is
recommended to consult a Yamaha dealer.
@