Yamaha FZ8NA Service Manual page 486

Item/components and
probable cause
5 ECU malfunction
6 ABS unit malfunction
B. Neutral switch system malfunction
Item/components and
probable cause
1 Connection of neutral switch
sensor coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
2 Connection of wire harness
ECU coupler
Check the connection of the
coupler is secure.
Remove the coupler, and
check each pin (for bending,
wear, or locking).
3 Continuity of wire harness
FUEL INJECTION SYSTEM
Check or maintenance job
Replace the ECU.
Replace the ABS unit.
Check or maintenance job
Poor connection → Recon-
nect or repair the coupler.
Poor connection → Recon-
nect or repair the coupler.
Open or short circuit →
Replace the wire harness.
Blue/yellow–Blue/yellow
8-91
Sensor inspection proce-
dure
Check in the diagnostic code
(Code No. d07). With the rear
wheel rotated, check the
pulse input.
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine.
Ride on the vehicle at a low
speed (approx 20–30 km/h).
Sensor inspection proce-
dure
Start the engine.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Start the engine.
Ride the vehicle at a low
speed (approx. 20–30 km/h).
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.