display YAMAHA WR 450F 2016 Owner's Manual
[x] Cancel search | Manufacturer: YAMAHA, Model Year: 2016, Model line: WR 450F, Model: YAMAHA WR 450F 2016Pages: 426, PDF Size: 10.86 MB
Page 369 of 426
FUEL INJECTION SYSTEM
9-39
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
2 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.
Fault code No. 15
Item Throttle position sensor: open or short circuit detected.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 01
Diagnostic tool display Throttle position sensor signal
• 11–14 (fully closed position)
• 109–116 (fully open position)
Procedure • Check with throttle valve fully closed.
• Check with throttle valve fully open.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of throttle posi- tion 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. Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played Go to item 2.
Fault code No.
14
Item Intake air pressure sensor: hose system malfunction (clogged
or detached hose).
Page 371 of 426
FUEL INJECTION SYSTEM
9-41
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
7 Malfunction in ECU. Replace the ECU.
Fault code No. 16
Item
Throttle position sensor: stuck throttle position sensor is de-
tected.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 01
Diagnostic tool display Throttle position sensor signal
• 11–14 (fully closed position)
• 109–116 (fully open position)
Procedure • Check with throttle valve fully closed.
• Check with throttle valve fully open.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Installed condition of throttle position sensor.
Check for looseness or
pinching. Improperly installed sensor
Reinstall or replace the
sensor.
Refer to “ADJUSTING THE
THROTTLE POSITION SEN-
SOR” on page 8-11. Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played Go to item 2.
2 Defective throttle position sensor. Check throttle position sen-
sor signal.
Execute the diagnostic mode.
(Code No. 01)
When the throttle valve is fully
closed:
A value of 11–14 is indicated.
When throttle valve is fully
open:
A value of 109–116 is indicat-
ed.
An indicated value is out of
the specified range.
Re-
place the throttle position
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 Malfunction in ECU. Replace the ECU. Fault code No. 15
Item Throttle position sensor: open or short circuit detected.
Page 372 of 426
FUEL INJECTION SYSTEM
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TIP
• Make sure that the engine is completely cool before checking the coolant temperature sensor.
• Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No. 21
Item Coolant temperature sensor: open or short circuit detected.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 06
Diagnostic tool display Displays the coolant temperature.
Procedure Compare the actually measured coolant temperature with the
Yamaha diagnostic tool display value.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of coolant tem- perature 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. Push the start switch.
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. 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 Wire harness continuity. Open or short circuit Re-
place the wire harness.
Between coolant temperature
sensor coupler and ECU cou-
pler.
green/white–green/white
black/blue–black/blue 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 Installed condition of coolant temperature sensor.
Check for looseness or
pinching. Improperly installed sensor
Reinstall or replace 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 5.
Page 373 of 426
FUEL INJECTION SYSTEM
9-43
TIP
• Make sure that the engine is completely cool before checking the intake air temperature sensor.
• Before troubleshooting, disconnect the starter motor lead from the starter relay.
5 Defective coolant tempera-
ture sensor. Execute the diagnostic mode.
(Code No. 06)
When engine is cold:
Displayed temperature is
close to the ambient temper-
ature.
The displayed temperature is
not close to the ambient tem-
perature.
Check the cool-
ant temperature sensor.
Replace if defective.
Refer to “CHECKING THE
COOLANT TEMPERATURE
SENSOR” on page 9-78. 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. 22
Item Intake air temperature sensor: open or short circuit detected.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 05
Diagnostic tool display Displays the intake air temperature.
Procedure Compare the actually measured intake air temperature with the
Yamaha diagnostic tool display value.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of intake air tem- perature 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. Push the start switch.
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. Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played Go to item 3.
Fault code No. 21
Item Coolant temperature sensor: open or short circuit detected.
Page 374 of 426
FUEL INJECTION SYSTEM
9-44
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
3 Wire harness continuity. Open or short circuit
Re-
place the wire harness.
Between intake air tempera-
ture sensor coupler and ECU
coupler.
black/blue–black/blue
brown/white–brown/white 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 Installed condition of intake air temperature sensor.
Check for looseness or
pinching. Improperly installed sensor
Reinstall or replace 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 5.
5 Defective intake air tempera- ture sensor. Execute the diagnostic mode.
(Code No. 05)
When engine is cold:
Displayed temperature is
close to the ambient temper-
ature.
The displayed temperature is
not close to the ambient tem-
perature.
Check the intake
air temperature sensor.
Replace if defective.
Refer to “CHECKING THE
INTAKE AIR TEMPERA-
TURE 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. 30
Item Latch up detected.
Fail-safe system Unable to start engine
Unable to drive vehicle
Diagnostic code No. 08
Diagnostic tool display Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Procedure Remove the lean angle sensor and incline it more than 45 degrees.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 The vehicle has overturned. Raise the vehicle upright. Push the start switch. Fault code number is not dis-
played Service is finished.
Fault code number is dis-
played Go to item 2.
Fault code No.
22
Item Intake air temperature sensor: open or short circuit detected.
Page 377 of 426
FUEL INJECTION SYSTEM
9-47
TIP
Disconnect the fuel pump coupler when this diagnostic tool is used.
Fault code No. 39
Item Injector: open or short circuit detected.
Fail-safe system Unable to start engine
Unable to drive vehicle
Diagnostic code No. 36
Actuation Actuates injector 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 injector is
actuated.
Procedure Check that injector is actuated five times by listening for the oper-
ating sound.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of injector cou- pler.
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. Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 2.
Operating sound Go to
item 6.
2 Defective injector. Measure the fuel injector re- sistance.
Replace if out of specifica-
tion.
Refer to “CHECKING THE
FUEL INJECTOR” on page 9-
81.Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 3.
Operating sound Go to
item 6.
3 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. Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 4.
Operating sound Go to
item 6.
4 Wire harness continuity. Open or short circuit Re-
place the wire harness.
Between injector coupler and
ECU coupler.
red/black–red/black
red–red/blue Execute the diagnostic mode
(Code No. 36).
No operating sound
Go to
item 5.
Operating sound Go to
item 6.
5 Malfunction in ECU. Replace the ECU. —
6 Delete the fault code. — Start the engine and let it idle for approximately 5 seconds.
Check that the fault code
number is not displayed.
Page 378 of 426
FUEL INJECTION SYSTEM
9-48
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No. 41
Item Lean angle sensor: open or short circuit detected.
Fail-safe system Unable to start engine
Able to drive vehicle
Diagnostic code No. 08
Diagnostic tool display Lean angle sensor output voltage
• 0.4–1.4 (upright)
• 3.7–4.4 (overturned)
Procedure Remove the lean angle sensor and incline it more than 45 degrees.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of lean angle 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. Push the start switch.
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. 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 Wire harness continuity. Open or short circuit Re-
place the wire harness.
Between lean angle sensor
coupler and ECU coupler.
blue–blue
yellow/green–yellow/green
black/blue–black/blue 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 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 5.
5 Malfunction in ECU. Replace the ECU.
Page 379 of 426
FUEL INJECTION SYSTEM
9-49
Fault code No.43
Item Fuel system voltage: incorrect voltage supplied to the fuel in-
jector and fuel pump.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 09
Diagnostic tool display Fuel system voltage
Approximately 12.0 (V)
Procedure Disconnect the main relay, and push the start switch or push down
the kickstarter lever.
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Connection of main relay 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.
3 Wire harness continuity. Open or short circuit Re-
place the wire harness.
Between battery terminal and
ECU coupler.
red-red
red-red/white
Between main relay coupler
and ECU coupler.
brown-brown
blue/red-blue/red 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 4.
4 Defective main relay. No operating sound Re-
place the main relay. 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 5.
5 Defective main relay. Execute the diagnostic mode. (Code No. 09)
Fuel system voltage is below
3 V Replace the main re-
lay. 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 6.
6 Malfunction in ECU. Replace the ECU.
Page 380 of 426
FUEL INJECTION SYSTEM
9-50
TIP
Before troubleshooting, disconnect the starter motor lead from the starter relay.
Fault code No. 44
Item EEPROM fault code number: an error is detected while read-
ing or writing on EEPROM.
Fail-safe system Able/Unable to start engine
Able/Unable to drive vehicle
Diagnostic code No. 60
Diagnostic tool display EEPROM fault code display
• 00: No fault
• 01: CO adjustment value
• 07: Setting tool adjustment values 0–8 for fuel injection amount or
ignition timing
Procedure —
Item Probable cause of malfunc-
tion and check Maintenance jobConfirmation of service
completion
1 Locate the malfunction Ex ecute the diagnostic mode
(Code No. 60).
00: Go to item 4.
01: Go to item 2.
07: Go to item 3. —
2 “01” is indicated in Diagnostic mode (Code No. 60) EEP-
ROM data error for adjust-
ment of CO concentration Change the CO concentra-
tion, and rewrite in EEPROM.
After this adjustment, push
the engine stop switch, then
push the start switch.
Memory not recovered
Re-
place the ECU. Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played Repeat the proce-
dure in item 1. If the same
number is indicated, perform
the procedure in item 4.
3 “07” is indicated in Diagnostic mode (Code No. 60) EEP-
ROM data error for setting
tool adjustment values for
fuel injection amount or igni-
tion timing. Erase the setting map in the
diagnostic mode (diagnostic
code No. 65).
Push the start switch.
Fault code number is not dis-
played
Service is finished.
Fault code number is dis-
played Repeat the proce-
dure in item 1. If the same
number is indicated, perform
the procedure in item 4.
4 Malfunction in ECU. Replace the ECU.
Page 381 of 426
FUEL INJECTION SYSTEM
9-51
Fault code No.46
Item Charging voltage is abnormal.
Fail-safe system Able/Unable to start engine
Able/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 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 2.
2 Wire harness continuity. Open or short circuit Re-
place the wire harness.
Between rectifier/regulator
coupler and ECU coupler.
red–red
Between battery terminal and
ECU coupler.
red–red 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.
3 Defective AC magneto. Check the AC magneto. Refer to “CHARGING SYS-
TEM” on page 9-12.
Defective AC magneto Re-
place. 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 4.
4 Malfunction in ECU. Replace the ECU.