Yamaha R1 Series 2015, Service Manual

Page: 569 / 704

FUEL INJECTION SYSTEM
8-88
Fault code No. 43
C-7 Malfunction in ECU. Replace the ECU.
Refer to “REPLACING THE
ECU (Engine Control Unit)” on
page 8-180.
C-8 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 operat-
ing the vehicle at 20 to 30 km/h
(19 mi/h).
The fault code can also be
delete by activating the diagnos-
tic mode and selecting diagnos-
tic code number “63”.
Fault code No. 43
Item
Fuel system voltage: incorrect voltage supplied to the fuel injector
and fuel pump.
Fail-safe system Able to start engine
Able to drive vehicle
Diagnostic code No. 09, 50
09 Meter display Fuel system voltage (battery voltage)
Approximately 12.0
Procedure
Set the start/engine stop switch to “ ”, and then compare the actually
measured battery voltage with the meter display value. (If the actually
measured battery voltage is low, recharge the battery.)
50
Actuation
Actuates the relay unit five times at one-second intervals.
Illuminates the engine trouble and system warning light.
Procedure
Check that the relay unit is actuated five times by listening for the operat-
ing sound.
Item Probable cause of
malfunction and check
Maintenance job Confirmation of service com-
pletion
1 Connection of relay unit 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).
Improperly connected
o
Con-
nect the coupler securely or
replace the wire harness.
Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played
o
Service is finished.
Fault code number is displayed
o
Go to item 2.
Fault code No. 42
Item
A Rear wheel sensor: no normal signals are received from the rear
wheel sensor.
B Neutral switch: open or short circuit is detected.
C Clutch switch: open or short circuit is detected.