Yamaha Wolverine YX70EPNG Service Manual page 430

Fault code No.
Item
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).
2 Defective fuel injector.
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).
4 Wire harness continuity.
5 Malfunction in ECU.
6 Delete the fault code.
Fault code No. 41
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Indicated
Procedure
Probable cause of malfunc-
Item
tion and check
39
Fuel injector: open or short circuit detected.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Measure the fuel injector resis-
tance.
Replace if out of specification.
Refer to "CHECKING THE
FUEL INJECTOR" on page
9-108.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between fuel injector coupler
and ECU coupler.
red–red
Between fuel injector coupler
and joint coupler.
red/blue–red/blue
Replace the ECU.
41
Lean angle sensor: open or short circuit detected.
Unable to start engine
Unable to drive vehicle
08
Lean angle sensor output voltage
• 3.6–4.4 (upright)
• 0.7–1.3 (overturned)
Remove the lean angle sensor and incline it more than 65 degrees.
Maintenance job
9-55
FUEL INJECTION SYSTEM
Execute the diagnostic mode.
(Code No. 36)
Operating sound → Go to item
6.
No operating sound → Go to
item 2.
Execute the diagnostic mode.
(Code No. 36)
Operating sound → Go to item
6.
No operating sound → Go to
item 3.
Execute the diagnostic mode.
(Code No. 36)
Operating sound → Go to item
6.
No operating sound → Go to
item 4.
Execute the diagnostic mode.
(Code No. 36)
Operating sound → Go to item
6.
No operating sound → Go to
item 5.
Start the engine and let it idle
for approximately 5 seconds.
Check that the fault code num-
ber is not displayed.
Confirmation of service com-
pletion