Yamaha 2016 Grizzly yfm700gplg, Service Manual

Page: 404 / 474

FUEL INJECTION SYSTEM
9-49
Fault code No. 41
1 Connection of fuel injector cou-
pler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Execute the diagnostic mode.
(Code No. 36)
Operating sound
→
Go to item
6.
No operating sound
→
Go to
item 2.
2 Defective fuel injector. Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to “CHECKING THE
FUEL INJECTOR” on page
9-96. Execute the diagnostic mode.
(Code No. 36)
Operating sound
→
Go to item
6.
No operating sound
→
Go to
item 3.
3 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
Execute the diagnostic mode.
(Code No. 36)
Operating sound
→
Go to item
6.
No operating sound
→
Go to
item 4.
4 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between fuel injector coupler
and ECU coupler.
red/black–red/black
Between fuel injector coupler
and joint coupler.
red/blue–red/blue
Execute the diagnostic mode.
(Code No. 36)
Operating sound
→
Go to item
6.
No operating sound
→
Go to
item 5.
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 num-
ber is not displayed.
Fault code No. 39
Item Fuel injector: open or short circuit detected.
Fault code No. 41
Item Lean angle sensor: open or short circuit detected.
Fail-safe system
Unable to start engine
Unable to drive vehicle
Diagnostic code No. 08
Indicated
Lean angle sensor output voltage
• 3.6–4.4 (upright)
• 0.7–1.3 (overturned)
Procedure Remove the lean angle sensor and incline it more than 65 degrees.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion