2015 YAMAHA GRIZZLY 550 check engine light

6-4
6
TIPWhen in reverse, the reverse indicator light
should come on. If the indicator light does not
come on, have a Yamaha dealer check the elec-
trical circuit.
 Due to the synchronizing mechanism in the en-
gine, the indicator light may not come on until
the ATV starts moving.
4. Check behind for people or obstacles, and
then release the brake pedal.
5. Open the throttle lever gradually and continue to watch to the rear while backing.EBU20683Engine break-inTIPFor ATVs equipped with an odometer or an hour
meter, follow the figures given in km (mi) or the
figures given in hours.
 For ATVs not equipped with an odometer or
hour meter, follow the figures given in hours. There is never a more important period in the life
of your engine than the first 320 km (200 mi) or 20
hours of riding. For this reason, you should read
the following material carefully.
Since the engine is brand new, do not put an ex-
cessive load on it for the first 320 km (200 mi) or
20 hours. The various parts in the engine wear and
polish themselves to the correct operating clear-
ances. During this period, prolonged full-throttle
operation or any condition that might result in en-
gine overheating must be avoided.
1. Drive select lever
2. L (Low-range)
3. H (High-range)
4. N (Neutral)
5. R (Reverse)
6. P (Park)
L 2H 3N4R5P6
U2LB61E0.book Page 4 Friday, February 21, 2014 3:03 PM

8-20
8
EBU23214Checking the spark plugThe spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the
spark plug should be removed and checked in ac-
cordance with the periodic maintenance and lubri-
cation chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug1. Remove the spark plug cap. 2. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s
tool kit.
To check the spark plug 1. Check that the porcelain insulator around the center electrode of the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).1. Spark plug cap1
1. Spark plug wrench
U2LB61E0.book Page 20 Friday, February 21, 2014 3:03 PM

12-1
12
INDEX
AAccessories and loading ................................................ 6-6
Accessories, auxiliary jack ........................................... 4-23
Air filter element, cleaning ........................................... 8-39
Axle boots .................................................................... 8-52BBattery ......................................................................... 8-55
Brake fluid, changing ................................................... 8-49
Brake fluid level, checking ........................................... 8-47
Brake lever, front ......................................................... 4-14
Brake levers, checking and lubricating ........................ 8-53
Brake pads, checking the front and rear ..................... 8-46
Brake pedal and rear brake lever ................................. 4-14
Brake pedal, checking and lubricating ........................ 8-54
Brake pedal free play, adjusting .................................. 8-50
Brakes .......................................................................... 8-46
Brakes, front and rear .................................................... 5-3CCables, checking and lubricating ................................ 8-52
Carrier, front ................................................................. 4-21
Carrier, rear .................................................................. 4-21
Chassis fasteners .......................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant .................................................................5-3, 8-31
Coolant temperature warning light ................................ 4-3DDifferential gear oil ................................................5-3, 8-29
Drive select lever ......................................................... 4-15
Drive select lever and driving in reverse ........................ 6-2Drive select lever safety system cable, adjusting ........ 8-46
EEngine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-22
Engine stop switch ........................................................ 4-8
Engine trouble warning light .......................................... 4-3
EPS warning light (for EPS model) ................................ 4-4FFinal gear oil ......................................................... 5-3, 8-26
Four-wheel-drive/differential gear lock indicator ........... 4-4
Front and rear brake lever free play, checking ............ 8-49
Fuel ....................................................................... 4-16, 5-3
Fuel tank cap ............................................................... 4-15
Fuses, replacing .......................................................... 8-59HHandlebar switches ....................................................... 4-7
Headlight beam, adjusting ........................................... 8-63
Headlight bulb, replacing ............................................. 8-61
High-range indicator light .............................................. 4-2
Horn switch .................................................................... 4-8IIdentification numbers ................................................. 11-1
Indicator lights and warning lights ................................. 4-2
Instruments, lights and switches ................................... 5-7LLabel locations ............................................................... 1-1
Light switch ................................................................... 4-8
Low-range indicator light ............................................... 4-2
U2LB61E0.book Page 1 Friday, February 21, 2014 3:03 PM

12-2
12
MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................8-5
Maintenance chart, emission control system ................ 8-3
Model label ................................................................... 11-1
Multi-function display .....................................................4-5NNeutral indicator light .....................................................4-2OOn-Command differential gear lock switch ................. 4-10
On-Command four-wheel-drive switch ......................... 4-9
Override switch .............................................................. 4-8
Owner’s manual and tool kit .......................................... 8-2PPanels, removing and installing ................................... 8-10
Park indicator light ......................................................... 4-2
Parking ........................................................................... 6-5
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RRadiator grills, removing .............................................. 8-19
Rear knuckle pivots, lubricating ................................... 8-55
Reverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-18
Shock absorber assemblies, adjusting the front and rear ............................................................................. 4-21
Spark arrester, cleaning ............................................... 8-42
Spark plug, checking ...................................................8-20 Specifications .............................................................. 10-1
Speed limiter ................................................................ 4-13
Stabilizer bushes, checking ......................................... 8-54
Starting the engine ......................................................... 6-1
Start switch .................................................................... 4-8
Steering shaft, lubricating ............................................ 8-55
Storage .......................................................................... 9-2
Storage compartments ................................................ 4-18
TTail/brake light bulb, replacing ..................................... 8-63
Throttle lever ........................................................ 4-13, 5-4
Throttle lever free play, adjusting ................................. 8-45
Tires ............................................................................... 5-4
Troubleshooting ........................................................... 8-66
Troubleshooting charts ................................................ 8-67VValve clearance ............................................................ 8-46
V-belt case drain plug .................................................. 8-44
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-54
Wheel, installing ........................................................... 8-65
Wheel, removing .......................................................... 8-64
U2LB61E0.book Page 2 Friday, February 21, 2014 3:03 PM