2003 YAMAHA GRIZZLY 660 coolant temperature

4-3
1. Differential gear lock indicator light “DIFF. LOCK”
2. Low-range indicator light “L”
3. High-range indicator light “H”
4. Neutral indicator light “N”
5. Reverse indicator light “R”
6. Park indicator light “P”
7. Four-wheel-drive indicator “”/“”
8. Coolant temperature warning light “”
1. Témoin de blocage du différentiel “DIFF. LOCK”
2. Témoin du rapport inférieur “L”
3. Témoin du rapport supérieur “H”
4. Témoin de point mort “N”
5. Témoin de marche arrière “R”
6. Témoin de stationnement “P”
7. Indicateur 4x4 “”/“”
8. Témoin d’avertissement de la température du liquide de
refroidissement “”
1. Luz indicadora de bloqueo del diferencial “DIFF.LOCK”
2. Luz indicadora de margen bajo “L”
3. Luz indicadora de margen alto “H”
4. Luz de control de punto muerto “N”
5. Luz indicadora de marcha atrás “R”
6. Luz indicadora de estacionamiento “P”
7. Indicador del modo de tracción en las cuatro ruedas “”/“”
8. Luz de aviso de la temperatura del refrigerante “”
DIFF.
LOCK
DIFF.
LOCK
DIFF.
LOCK
EBU00802
Indicator and warning lights
EBU01130
Differential gear lock indicator light
“DIFF. LOCK”
This indicator light comes on along with the differ-
ential gear lock indicator in the display when the
differential gear lock switch is set to the “LOCK-
4WD” position.
EBU01122
Low-range indicator light “L”
This indicator light comes on when the drive select
lever is in the “L” position.
EBU01064
High-range indicator light “H”
This indicator light comes on when the drive select
lever is in the “H” position.
EBU00972
Neutral indicator light “N”
This indicator light comes on when the drive select
lever is in the “N” position.
U5KM61.book Page 3 Friday, July 26, 2002 11:13 AM

4-5
1. Differential gear lock indicator light “DIFF. LOCK”
2. Low-range indicator light “L”
3. High-range indicator light “H”
4. Neutral indicator light “N”
5. Reverse indicator light “R”
6. Park indicator light “P”
7. Four-wheel-drive indicator “”/“”
8. Coolant temperature warning light “”
1. Témoin de blocage du différentiel “DIFF. LOCK”
2. Témoin du rapport inférieur “L”
3. Témoin du rapport supérieur “H”
4. Témoin de point mort “N”
5. Témoin de marche arrière “R”
6. Témoin de stationnement “P”
7. Indicateur 4x4 “”/“”
8. Témoin d’avertissement de la température du liquide de
refroidissement “”
1. Luz indicadora de bloqueo del diferencial “DIFF.LOCK”
2. Luz indicadora de margen bajo “L”
3. Luz indicadora de margen alto “H”
4. Luz de control de punto muerto “N”
5. Luz indicadora de marcha atrás “R”
6. Luz indicadora de estacionamiento “P”
7. Indicador del modo de tracción en las cuatro ruedas “”/“”
8. Luz de aviso de la temperatura del refrigerante “”
DIFF.
LOCK
DIFF.
LOCK
DIFF.
LOCK
EBU00867
Reverse indicator light “R”
This indicator light comes on when the drive select
lever is in the “R” reverse position.NOTE:_ If the indicator light flashes or the speedometer
does not show the speed while riding, have a
Yamaha dealer check the speed sensor circuit. _
EBU00609
Park indicator light “P”
This indicator light comes on when the drive select
lever is in the “P” (park) position.
EBU01131
Four-wheel-drive indicator “”/“”
This indicator comes on when the “2WD”/“4WD”
switch is set to the “4WD” position. The differential
lock indicator “DIFF.LOCK” in the four-wheel-drive
indicator also comes on when the “LOCK”-“4WD”
switch is set to the “LOCK-4WD” position.NOTE:_ Due to the synchronizing mechanism in the differ-
ential gear case, the four-wheel drive indicator
may not come on until the ATV starts moving. _
DIFF.
LOCK
U5KM61.book Page 5 Friday, July 26, 2002 11:13 AM

4-7
EBU00860
Coolant temperature warning light “”
When the coolant temperature reaches a specified
level, this light comes on to warn that the coolant
temperature is too hot. If the light comes on during
operation, stop the engine as soon as it is safe to
do so and allow the engine to cool down for about
10 minutes.CAUTION:_

The engine may overheat if the ATV is
overloaded. If this happens, reduce the
load to specification.


After restarting, make sure that the light is
out. Continuous use while the light is on
may cause damage to the engine.
_
1. Differential gear lock indicator light “DIFF. LOCK”
2. Low-range indicator light “L”
3. High-range indicator light “H”
4. Neutral indicator light “N”
5. Reverse indicator light “R”
6. Park indicator light “P”
7. Four-wheel-drive indicator “”/“”
8. Coolant temperature warning light “”
1. Témoin de blocage du différentiel “DIFF. LOCK”
2. Témoin du rapport inférieur “L”
3. Témoin du rapport supérieur “H”
4. Témoin de point mort “N”
5. Témoin de marche arrière “R”
6. Témoin de stationnement “P”
7. Indicateur 4x4 “”/“”
8. Témoin d’avertissement de la température du liquide de
refroidissement “”
1. Luz indicadora de bloqueo del diferencial “DIFF.LOCK”
2. Luz indicadora de margen bajo “L”
3. Luz indicadora de margen alto “H”
4. Luz de control de punto muerto “N”
5. Luz indicadora de marcha atrás “R”
6. Luz indicadora de estacionamiento “P”
7. Indicador del modo de tracción en las cuatro ruedas “”/“”
8. Luz de aviso de la temperatura del refrigerante “”
DIFF.
LOCK
DIFF.
LOCK
DIFF.
LOCK
U5KM61.book Page 7 Friday, July 26, 2002 11:13 AM

5-21
EBU00678
Differential gear oil
Make sure the differential gear oil is at the speci-
fied level. Add oil as necessary. (See pages 8-51–
8-55 for details.)
EBU01244
Coolant
Check the coolant level in the coolant reservoir
when the engine is cold. (The coolant level will
vary with engine temperature.) The coolant level is
satisfactory if it is between the upper and lower
level marks on the coolant reservoir. If the coolant
level is at or below the lower level mark, add tap
water (soft water) to bring the level up to the upper
level mark. Change the coolant every two years.
(See pages 8-57–8-67 for details.)CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use distilled water if you cannot
get soft water. _
Recommended oil:
SAE 80 API GL-4 Hypoid gear oil
U5KM61.book Page 21 Friday, July 26, 2002 11:13 AM

8-57 1. Coolant reservoir tank cap
2. Maximum level mark
3. Minimum level mark
1. Bouchon du vase d’expansion
2. Repère de niveau maximum
3. Repère de niveau minimum
1. Tapa del depósito de refrigerante
2. Marca de nivel máximo
3. Marca de nivel mínimo
EBU01000
Cooling system
1. Check the coolant level in the reservoir when
the engine is cold as the coolant level will
vary with engine temperature. The coolant
level should be between the maximum and
minimum marks.
2. If the level is low, remove panel D. (See page
8-17 for panel removal and installation proce-
dures.)
U5KM61.book Page 57 Friday, July 26, 2002 11:13 AM

8-59
3. Remove the reservoir cap, and then add
coolant or distilled water to raise it to the
specified level.
4. Install the panel.CAUTION:_ Hard water or salt water is harmful to the en-
gine. You may use soft water if you can’t get
distilled water. _NOTE:_

If water is added, have a Yamaha dealer
check the antifreeze content of the coolant as
soon as possible.


The radiator fan operation is completely auto-
matic. It is switched on or off according to the
coolant temperature in the radiator.
_If your ATV overheats, see page 8-140 for details.Coolant reservoir capacity:
0.30 L
U5KM61.book Page 59 Friday, July 26, 2002 11:13 AM

10-6
Headlight type: Krypton bulb
Bulb voltage, wattage
× quantity:
Headlight 12 V, 30 W / 30 W
× 2
Tail/brake light 12 V, 5 W / 21 W
× 1
Indicator light:
Neutral indicator light LED
× 1
Reverse indicator light LED
× 1
Coolant temperature warning light LED
× 1
Park position indicator light LED
× 1
High gear position indicator light LED
× 1
Low gear position indicator light LED
× 1
Differential gear lock indicator light LED
× 1
Specified fuses:
Main fuse 30 A
Headlight fuse 15 A
Ignition fuse 10 A
Auxiliary DC jack fuse 10 A
Four-wheel drive fuse 3 A
Signaling system fuse 10 A
Odometer fuse (backup) 10 AModel YFM660F
U5KM61.book Page 6 Friday, July 26, 2002 11:13 AM