2016 YAMAHA WR 450F ECO mode

ENGINE
3-12
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS2GC1087CHECKING THE COOLANT CIRCULATORY
SYSTEM FOR LEAKS
1. Check:• Coolant level
2. Install: • Radiator cap tester “1”
• Adapter “2”
3. Activate the tester to apply the test pressure.
ECA
NOTICE
• Do not apply such a high pressure as ex- ceeds the test pressure.
• Make sure that a checkup after the cylin-
der head gasket is replaced is made after 3
minutes of warm-up.
• Make sure that coolant is filled up to the
upper level beforehand.
TIP
This model is equipped with an engine auto-
stop system. The engine stops automatically if
left idling for 7 minutes. If the engine stops,
push the start switch or push down the kick-
starter lever to restart the engine.
4. Check:
• Pressure valueNo stay for 5 to 10 seconds at the test pres-
sure value  Correct.
• Radiator
• Radiator hose connections Coolant leaks  Correct or replace.
• Radiator hoses Bulges  Replace
EWA
WARNING
When the radiator cap tester is removed,
coolant will spout; therefore, cover it with a
cloth beforehand.
EAS2GC1088ADJUSTING THE CLUTCH LEVER FREE
PLAY
1. Check:
• Clutch lever free play “a”Out of specification  Regulate.
Radiator cap tester
90890-01325
Mityvac cooling system tester kit YU-24460-A
Radiator cap tester adapter 90890-01352
Pressure tester adapter YU-33984
Radiator cap tester 90890-01325
Mityvac cooling system tester kit YU-24460-A
Radiator cap tester adapter 90890-01352
Pressure tester adapter YU-33984
Test pressure value 196 kPa (1.96 kg/cm
2, 27.9 psi)
Clutch lever free play 7.0–12.0 mm (0.28–0.47 in)

ENGINE
3-17
NOTICE
• Since engine oil also lubricates the clutch, the wrong oil types or additives could
cause clutch slippage. Therefore, do not
add any chemical additives.
• Do not allow foreign material to enter the
crankcase.
EAS2GC1097CHANGING THE ENGINE OIL
Stand the vehicle upright on a level surface.
1. Start the engine, warm this up for 3 minutes, and then stop the engine and wait about 5
minutes.
TIP
This model is equipped with an engine auto-
stop system. The engine stops automatically if
left idling for 7 minutes. If the engine stops,
push the start switch or push down the kick-
starter lever to restart the engine.
2. Place an oil pan under the drain bolt.
3. Remove:• Engine guard “1”
• Oil filler cap “2”
• Drain bolt (with gasket) “3” 4. If the oil filter element is also to be replaced,
perform the following procedure.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the oil filter element cover “1” and oil filter element “2”.
b. Replace the O-ring “3”.
c. Install the new oil filter element and the oil fil- ter element cover.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
5. To check the oil strainer, perform the follow-ing procedure.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the oil strainer “1”.
b. Check the oil strainer.Damage  Replace.
Clogging due to dirt  Wash with kerosene.
Recommended brand
YAMALUBE
Type SAE 10W-40, SAE 10W-50, SAE
15W-40, SAE 20W-40 or SAE
20W-50
Recommended engine oil grade API service SG type or higher,
JASO standard MA
Oil filter element cover bolt10 Nm (1.0 m·kgf, 7.2 ft·lbf)
12
3
1
3 2
New
T R..

ENGINE
3-19
EAS2GC1098ADJUSTING THE ENGINE IDLING SPEED
TIP
• Because the air pressure is lower at high alti-tudes, the air-fuel mixture will become richer.
If the idling speed is low, turn the starter knob/
idle screw a few clicks counterclockwise to in-
crease the speed before the adjustment.
• Before adjusting the engine idling speed, make sure that the air filter element is not
clogged, the engine compression is proper,
and the throttle grip free play is proper.
• Adjust the engine idling speed with the starter
knob/idle screw pushed in completely.
1. Start the engine, and warm this up until the oil has reached the specified temperature.
TIP
This model is equipped with an engine auto-
stop system. The engine stops automatically if
left idling for 7 minutes. If the engine stops,
push the start switch or push down the kick-
starter lever to restart the engine.
2. Attach the pocket tester with temperature probe “1” to the oil drain bolt.
3. Install: • Digital tachometer
TIP
Get the high tension cord “1” of the ignition coil
pinched in the detector “a” of the digital tachom-
eter.
4. Measure:• Engine idling speed
Out of specification  Regulate.
5. Adjust: • Engine idling speed
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the starter knob/idle screw “1” in the di- rection of “a” or “b” to make an adjustment.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
Oil temperature70–80 °C (158–176 °F)
Digital tachometer 90890-06760
Digital tachometer YU-39951-B
1
Engine idling speed 1900–2100 r/min
Direction “a” Engine idling speed  De-
creases.
Direction “b” Engine idling speed  In-
creases.
1
1
a
a
1
b
a

FUEL INJECTION SYSTEM
9-32
EAS2GC1377YAMAHA DIAGNOSTIC TOOL
This model uses the Yamaha diagnostic tool to identify malfunctions.
For information about using the Yamaha diagnostic tool, refer to the operation manual that is included
with the tool.
FEATURES OF THE YAMAHA DIAGNOSTIC TOOL
A diagnosis can be made more quickly than traditional methods with the Yamaha diagnostic tool.
Using this software, ECU and sensor data, as well as fault diagnosis, vehicle maintenance, and any
necessary information can be recorded and disp layed on your computer screen through a USB
adapter connected to the computer interface with a communication cable connected to the vehicle’s
ECU.
Data obtained in various functions can be saved as vehicle history, and can be accumulated.
FUNCTIONS OF THE YAMAHA DIAGNOSTIC TOOL
However, the diagnostic tool cannot be used to freely change the basic vehicle functions, such as
adjusting the ignition timing.
CONNECTING THE YAMAHA DIAGNOSTIC TOOL
1. Remove the coupler for connecting setting tool. Yamaha diagnostic tool
90890-03231
Yamaha diagnostic tool (US) 90890-03234
Fault diagnosis mode Fault codes recorded on the ECU are read, and the con- tents are displayed.
Function diagnostic mode Check the operation of the output value of each sensor
and actuator.
Inspection mode Determine whether each s ensor or actuator is functioning
properly.
CO adjustment mode Adjust the concentration of CO admissions during idling.
Monitoring mode Displays a graph of sensor output values for actual oper-
ating conditions.
Logging mode Records and saves the sensor output value in actual driv-
ing conditions.
View log Displays the logging data.
ECU rewrite If necessary, the ECU is rewritten using the ECU rewrite
data provided by Yamaha. Ignition timing adjustment, etc.
cannot be changed from the vehicle’s original state.

FUEL INJECTION SYSTEM
9-34
Operation of the Yamaha diagnostic tool (Malfunction mode)
Malfunction results are displayed in the top part of the window area.
1. RecoveredThe item list of the malfunction detected in the past (already recovered) are displayed.
2. Detected The item list of the malfunction currently occurred are displayed.
3. Code
The following icons and the fault code numbers for the detected malfunctions are displayed.
4. ECU The types of the control units are displayed.
5. Item
The item names of the detected malfunction are displayed.
A. Detected malfunction
B. Recovered malfunction
2 3
1
456789101112
AB

FUEL INJECTION SYSTEM
9-35
6. ConditionThe current conditions are displayed. (Detected/Recovered)
7. Symptom
The symptoms of the detected malfunction are displayed.
8. Diagnosis code The diagnosis codes related to the detected malfunction are displayed.
9. FFD (only for models that can display freeze frame data) The mark “ ” is displayed when the freeze frame data is available.
10.ECU conduction time (hour: minute: second)
The total ECU conduction time (total hours the vehicle’s start switch was ON) when the malfunc-
tion was detected is displayed.
11.Number of main switch operation after detection
The number of times the meter light comes on by pushing the start switch between the malfunction
detection and code reading is displayed.
12.Number of occurrences The number of malfunction occurrences between th e malfunction detection and code reading is
displayed.
EAS2GC1378TROUBLESHOOTING DETAILS
This section describes the measures per fault c ode number displayed on the diagnostic tool. Check
and service the items or components that are the probable cause of the malfunction following the or-
der given.
After the check and service of the malfunctioning part have been completed, reset the diagnostic tool
display according to the reinstatement method.
Fault code No.:
Fault code number displayed on the diagnostic tool when the engine failed to work normally.
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated.
Fault code No. 12
Item Crankshaft position sensor: no normal signals are received
from the crankshaft position sensor.
Fail-safe system Unable to start engine
Unable to drive vehicle
Diagnostic code No. —
Diagnostic tool display —
Procedure —
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of crankshaft po- sition sensor coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected

Connect the coupler securely
or repair/replace the wire har-
ness. Crank the engine.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 2.

FUEL INJECTION SYSTEM
9-38
TIP
• If fault code Nos. 13 and 14 are both displayed, perform the checks and maintenance jobs for fault
code No. 13 first.
• Before troubleshooting, disconnect the star ter motor lead from the starter relay.
5 Defective intake air pressure
sensor. Execute the diagnostic mode.
(Code No. 03)
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
At sea level: Approx. 101 kPa
1000 m above sea level: Ap-
prox. 90 kPa
2000 m above sea level: Ap-
prox. 80 kPa
3000 m above sea level: Ap-
prox. 70 kPa
When engine is cranking:
Make sure that the indication
value changes.
The value does not change
when engine is cranking.

Check the intake air pressure
sensor.
Replace if defective.
Refer to “CHECKING THE
INTAKE AIR PRESSURE
SENSOR” on page 9-80. Push the start switch.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 6.
6 Malfunction in ECU. Replace the ECU.
Fault code No. 14
Item Intake air pressure sensor: hose system malfunction (clogged
or detached hose).
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 03
Diagnostic tool display Displays the intake air pressure.
Procedure Operate the throttle while pushing the start switch.(If the display
value changes, the performance is OK.)
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 The intake air pressure sen- sor hose is damaged, discon-
nected, clogged, twisted or
bent. Repair or replace the sensor
hose.
Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 2.
Fault code No. 13
Item Intake air pressure sensor: open or short circuit detected.

FUEL INJECTION SYSTEM
9-45
2 Installed condition of lean an-gle sensor. Check the installed direction
and condition of the sensor. Push the start switch.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 3.
3 Defective lean angle sensor. Execute the diagnostic mode. (Code No. 08)
Replace if defective.
Refer to “CHECKING THE
LEAN ANGLE SENSOR” on
page 9-75.Push the start switch.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 4.
4 Malfunction in ECU. Replace the ECU.
Fault code No. 33
Item Ignition coil: open or short circuit detected in the primary lead
of the ignition coil.
Fail-safe system Unable to start engine
Unable to drive vehicle
Diagnostic code No. 30
Actuation Actuates the ignition coil five times at one-second intervals.
The engine trouble warning light and the “WARNING” on the
Yamaha diagnostic tool screen come on each time the ignition coil
is actuated.
Procedure Check that a spark is generated five times.
• Connect an ignition checker.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of ignition coil coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected

Connect the coupler securely
or repair/replace the wire har-
ness. Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 2.
2 Connection of wire harness ECU coupler.
Check the locking condition
of the coupler.
Disconnect the coupler and
check the pins (bent or bro-
ken terminals and locking
condition of the pins). Improperly connected

Connect the coupler securely
or repair/replace the wire har-
ness. Start the engine and let it idle
for approximately 5 seconds.
Fault code number is not dis-
played
 Service is finished.
Fault code number is dis-
played  Go to item 3.
Fault code No.
30
Item Latch up detected.