Yamaha R15 2022, Service Manual

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8-73
FUEL INJECTION SYSTEM TROUBLESHOOTING
– + ELEC
Fault code No. P0500
3 Wire harness continuity. Open or short circuit
→
Replace
the wire harness.
Between ECU coupler and radi-
ator fan motor relay coupler.
white/yellow–white/yellow
Between radiator fan motor re-
lay coupler and main switch
coupler.
brown–brown
Between main switch coupler
and main fuse.
red–red
Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the YDT.
Condition is “Recover”
→
Go to
item 6 and finish the service.
Condition is “Malfunction”
→
Go
to item 4.
4 Defective radiator fan motor re-
lay. Check the radiator fan motor re-
lay.
Replace if defective. Turn the main switch to “ON”,
and then check the condition of
the fault code using the mal-
function mode of the YDT.
Condition is “Recover”
→
Go to
item 6 and finish the service.
Condition is “Malfunction”
→
Go
to item 5.
5 Malfunction in ECU. Replace the ECU. Service is finished.
6 Delete the fault code and check
that the engine trouble warning
light goes off. Confirm that the fault code has
a condition of “Recover” using
the YDT, and then delete the
fault code.
Fault code No. P0500
Item
Front wheel sensor: normal signals are not received from the front
wheel sensor.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. 07
Tool display
Vehicle speed pulse
0–999
Procedure
Check that the number increases when the front wheel is rotated. The
number is cumulative and does not reset each time the front wheel is
stopped.
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
1 Connection of front wheel sen-
sor 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. 07)
Rotate the front wheel by hand
and check the condition of the
fault code using the malfunction
mode of the YDT.
Condition is “Recover”
→
Go to
item 8 and finish the service.
Condition is “Malfunction”
→
Go
to item 2.
Fault code No. P0480
Item Normal signal is not received from the radiator fan motor relay.
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