Yamaha N MAX GPD150-A 2015 Service Manual page 375

Fault code No.
Item
5 Malfunction in ECU
Fault code No. 84
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Action
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of VVA (variable
valve actuator) solenoid coupler.
Check the locking condition of
the coupler. Disconnect the cou-
pler 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.
61
ISC (idle speed control) unit: open or short circuit detected.
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-99.
84
VVA (variable valve actuator) solenoid: open or short circuit detect-
ed.
Able to start engine
Able to drive vehicle
45
Actuates the VVA (variable valve actuator) solenoid five times at three-
second intervals. The "CHECK" indicator and "
nostic tool screen come on each time the VVA (variable valve actuator)
solenoid is actuated.
Remove the VVA (variable valve actuator) solenoid from the cylinder
head, and then connect the VVA (variable valve actuator) solenoid cou-
pler.
Refer to "CYLINDER HEAD" on page 5-9.
Visually check that the VVA (variable valve actuator) 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 → Replace
the wire harness.
Between VVA (variable valve
actuator) solenoid coupler and
ECU coupler.
Green–Green
Chocolate-Chocolate
Between engine ground and
ECU coupler.
Black/Yellow–Black/Yellow
8-50
FUEL INJECTION SYSTEM
" on the Yamaha diag-
Confirmation of service com-
Set the main switch to "ON".
Start the engine and accelerate
to 6000 r/min.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 2.
Set the main switch to "ON".
Start the engine and accelerate
to 6000 r/min.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 3.
Set the main switch to "ON".
Start the engine and accelerate
to 6000 r/min.
Fault code number is not dis-
played → Service is finished.
Fault code number is displayed
→ Go to item 4.
pletion