check engine light YAMAHA KODIAK 450 2020 User Guide

8-17
8
5. Install the cover.
For handlebar-mounted light cover
equipped models: Install the handlebar-
mounted light cover.
 For handlebar-mounted light cover non-
equipped models: Install the handlebar
cover.
6. Install the panels.
EBU23215Checking 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 plug 1. Remove the spark plug cap. 2. Remove the spark plug as shown, with the
spark plug wrench included in the tool kit.
1. Spark plug cap
1. Spark plug wrench
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8To 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).
TIPIf the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV. 2. Check the spark plug for electrode erosionand excessive carbon or other deposits, and
replace it if necessary.
3. Measure the spark plug gap with a wire thick- ness gauge and, if necessary, adjust the gap
to specification. To install the spark plug
1. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any
grime from the spark plug threads.
2. Install the spark plug with the spark plug wrench, and then tighten it to the specified
torque.
Specified spark plug:
NGK/DR7EA
1. Spark plug gapSpark plug gap:0.6–0.7 mm (0.024–0.028 in)
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3. Tap the tailpipe lightly, and then use a wire
brush to remove any carbon deposits from
the spark arrester portion of the tailpipe and
inside of the tailpipe housing.
4. Check the gasket for damage. Replace if nec- essary.
5. Install the gasket onto the tailpipe, then insert the tailpipe into the muffler and align the bolt
holes.
6. Install the bolts and tighten to the specified torque.
EBU23921V-belt cooling duct check hoseIf dust or water collects in the V-belt cooling duct
check hose, remove the hose and clean it.
EBU23932V-belt case drain plugAfter riding in water deep enough to allow it to en-
ter the V-belt case, remove the V-belt case drain
plug to drain the water from the case.TIPIf water drains from the V-belt case after removing
the plug, have a Yamaha dealer check the ATV as
the water may affect other engine parts.
Tightening torque:Tailpipe bolt:10 N·m (1.0 kgf·m, 7.4 lb·ft)
1. V-belt cooling duct check hose (left front side of ATV)
1
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82. Remove the seat. (See page 4-18.)
3. Remove the blown fuse, and then install a
new fuse of the specified amperage.
WARNING! Always use a fuse of the spec-
ified rating, and never use a substitute ob-
ject in place of the proper fuse. An
improper fuse or a substitute object can
cause damage to the electrical system,
which could lead to a fire.
[EWB02173]
4. Turn on the main switch, start the engine, andthen turn on the circuit in question.
5. If the fuse immediately blows again, have a Yamaha dealer check the vehicle.
Specified fuses:
Main fuse:40.0 A
Headlight fuse: 15.0 A
Ignition fuse: 10.0 A
Four-wheel-drive motor fuse: 10.0 A (B5R1/B5R2/B5R3)
3.0 A (BJ5H/BB5R/BJ5D/BJ5E/BB5M)
Signaling system fuse: 10.0 A
Radiator fan motor fuse: 20.0 A
Auxiliary DC jack fuse: 10.0 A
Fuel injection system fuse: 10.0 A
EPS fuse: 40.0 A (YFM450FWBD, YFM45KPAL)
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INDEX
AAccessories and loading ................................................ 6-5
Accessories, DC jack ................................................... 4-24
Air filter, cleaning ......................................................... 8-33
Axle boots .................................................................... 8-47BBattery ......................................................................... 8-53
Brake fluid, changing ................................................... 8-42
Brake fluid level, checking ........................................... 8-40
Brake lever free play, checking the front ..................... 8-42
Brake lever, front ......................................................... 4-14
Brake levers, checking and lubricating ........................ 8-49
Brake light switches ..................................................... 8-48
Brake pads and friction plates, checking .................... 8-40
Brake pedal and rear brake lever ................................. 4-14
Brake pedal, checking and lubricating ........................ 8-50
Brakes .......................................................................... 8-39
Brakes, front and rear .................................................... 5-3
Brake/tail light bulb, replacing ..................................... 8-63CCables, checking and lubricating ................................ 8-49
Carrier, front ................................................................. 4-20
Carrier, rear .................................................................. 4-20
Chassis fasteners .......................................................... 5-7
Cleaning ......................................................................... 9-1
Coolant .................................................................5-3, 8-29
Coolant temperature warning light ................................ 4-2DDifferential gear lock, indicator (equipped models) ....... 4-4Differential gear oil ......................................................... 5-3
Differential gear oil, changing ...................................... 8-27
Display unit .................................................................... 4-4
Drive select lever ......................................................... 4-15
Drive select lever and driving in reverse ........................ 6-2
Drive shaft universal joint, lubricating .......................... 8-51
EEmissions Certification label (for
Europe) .................... 11-2
Engine break-in .............................................................. 6-4
Engine oil ....................................................................... 5-3
Engine oil and oil filter cartridge .................................. 8-19
Engine stop switch ........................................................ 4-9
Engine trouble warning light .......................................... 4-3
EPS warning light (equipped models) ............................ 4-3FFinal gear oil ......................................................... 5-3, 8-24
Four-wheel drive indicator light ..................................... 4-4
Four-wheel drive switch (On-Command 4WD) ............ 4-11
Fuel ....................................................................... 4-17, 5-3
Fuel tank cap ............................................................... 4-16
Fuses, replacing .......................................................... 8-57HHandlebar switches ....................................................... 4-7
Headlight beam, adjusting ........................................... 8-62
Headlight bulb, replacing ............................................. 8-59
Horn switch .................................................................... 4-9IIdentification numbers ................................................. 11-1
Indicator lights and warning lights ................................. 4-1
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Instruments, lights and switches ................................... 5-7LLabel locations ............................................................... 1-1
Light switch .................................................................... 4-9MMain switch .................................................................... 4-1
Maintenance and lubrication chart ................................8-5
Maintenance chart, emission control system ................ 8-3
Model label ................................................................... 11-1NNeutral indicator light .....................................................4-2OOn-Command drive switch “4WD/LOCK” (differential gear lock models) ...................................................... 4-11
Override switch (differential gear lock models) ............ 4-10
Owner’s Manual and tool kit .......................................... 8-2PPanels, removing and installing ................................... 8-10
Park indicator light ......................................................... 4-2
Parking ........................................................................... 6-4
Parking on a slope ......................................................... 6-5
Part locations ................................................................. 3-1RRear brake, adjusting the lever and pedal ................... 8-42
Rear knuckle pivots, lubricating ................................... 8-52
Reverse indicator light ................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 2-1
Seat .............................................................................. 4-18 Shock absorber assemblies, adjusting the front and
rear ............................................................................. 4-20
Spark arrester, cleaning ............................................... 8-36
Spark plug, checking ................................................... 8-17
Specifications .............................................................. 10-1
Speed limiter ................................................................ 4-13
Stabilizer bushes, checking ......................................... 8-51
Starting the engine ......................................................... 6-1
Start switch .................................................................... 4-9
Steering shaft, lubricating ............................................ 8-52
Storage .......................................................................... 9-2
Storage compartment .................................................. 4-19
TThrottle lever ........................................................ 4-13, 5-4
Throttle lever free play, adjusting ................................. 8-38
Tires ............................................................................... 5-4
Trailer hitch (equipped models) ................................... 4-23
Troubleshooting ........................................................... 8-65
Troubleshooting charts ................................................ 8-66VValve clearance ............................................................ 8-39
V-belt case drain plug .................................................. 8-37
V-belt cooling duct check hose ................................... 8-37
Vehicle identification number ....................................... 11-1WWheel hub bearings, checking ..................................... 8-50
Wheel, installing ........................................................... 8-64
Wheel, removing .......................................................... 8-63
Winch (for Europe) ....................................................... 4-22
Winch pre-wiring (for Oceania) .................................... 4-25
Winch switch ................................................................ 4-10
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