Yamaha R15 2022 Service Manual page 423

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No. P2645
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of VVA solenoid
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 wire harness
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.
P2645
VVA (Variable Valve Actuator): Normal signal is not received from
the VVA solenoid circuit while driving the VVA solenoid.
Able to start engine
Able to drive vehicle
45
Actuates the VVA solenoid five times at five-second intervals. The check
indicator on the YDT screen come on each time the VVA solenoid is ac-
tuated.
Remove the VVA solenoid from the cylinder head, and then connect the
VVA solenoid coupler.
Refer to "CYLINDER HEAD" on page 5-7.
Visually check that the VVA solenoid is actuated five times.
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 VVA (variable valve
actuator) solenoid coupler and
ECU coupler.
green–green & chocolate-choc-
olate
8-90
ELEC
Confirmation of service com-
pletion
Set the main switch to "ON".
Start the engine and accelerate
to 7400 r/min.
Check the condition of 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.
Set the main switch to "ON".
Start the engine and accelerate
to 7400 r/min.
Check the condition of 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.
Set the main switch to "ON".
Start the engine and accelerate
to 7400 r/min.
Check the condition of 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.
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