Yamaha R15 2022 Service Manual page 413

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No. P1601
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of Sidestand switch
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).
2 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).
3 Wire harness continuity.
4 Defective Sidestand switch.
5 Malfunction in ECU.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
P1601
Sidestand switch: open or short circuit is detected.
Unable to start engine
Unable to drive vehicle
20
Sidestand switch
• ON (Sidestand retracted)
• OFF (Sidestand extended)
Extend and retract the sidestand.
Maintenance job
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Properly
connect or replace the wire har-
ness.
Between ECU coupler and Sid-
estand switch coupler.
blue/green–blue/green
Between Sidestand switch cou-
pler and ground.
blue/black–black
Execute the diagnostic mode.
(Code No. 20)
Sidestand retracted: "ON"
Sidestand extended: "OFF"
Replace if defective.
Replace the ECU.
Confirm that the fault code has
a condition of "Recover" using
the YDT, and then delete the
fault code.
8-80
ELEC
Confirmation of service com-
pletion
Turn the main switch to "ON",
extend and retract the sides-
tand. And then check the fault
code using the malfunction
mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 2.
Turn the main switch to "ON",
extend and retract the sides-
tand. And then check the fault
code using the malfunction
mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 3.
Turn the main switch to "ON",
extend and retract the sides-
tand. And then check the fault
code using the malfunction
mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 4.
Turn the main switch to "ON",
extend and retract the sides-
tand. And then check the fault
code using the malfunction
mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 5.
Service is finished.
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