Yamaha FZ09E 2014 Service Manual page 400

Fault code No.
Item
4 Wire harness continuity.
5 Malfunction in ECU.
6 Delete the fault code.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
42
Speed sensor: no normal signals are received from the
A
speed sensor.
B Neutral switch: open or short circuit is detected.
C Clutch switch: open or short circuit is detected.
Open or short circuit 
Replace the wire harness.
Between speed sensor cou-
pler and ECU coupler.
white/yellow–white/yellow
Between speed sensor cou-
pler and joint connector.
blue–blue
black/blue–black/blue
Between joint connector and
ECU coupler.
blue–blue
black/blue–black/blue
Replace the ECU.
Refer to "REPLACING THE
ECU (engine control unit)" on
page 8-93.
42
Speed sensor: no normal signals are received from the speed
A
sensor.
B Neutral switch: open or short circuit is detected.
C Clutch switch: open or short circuit is detected.
Able to start engine
Able to drive vehicle
21
8-65
FUEL INJECTION SYSTEM
Execute the diagnostic
mode. (Code No. 07)
Rotate the rear wheel by
hand and check that the indi-
cated value increases.
Value increases  Go to
item 6 and delete the fault
code.
Value does not increase 
Go to item 5.
Go to item 6 and delete the
fault code.
Turn the main switch to "ON",
and then rotate the rear
wheel by hand.
Start the engine, and input
the vehicle speed signals by
operating the vehicle at 20 to
30 km/h (19 mi/h).
The fault code can also be
deleted by activating the
diagnostic mode and select-
ing diagnostic code number
"63".