Fuel System Voltage: Incorrect Voltage Supplied To The Fuel Injector - Yamaha R1 Series 2015 Service Manual

Fault code No.
Item
C-7 Malfunction in ECU.
C-8 Delete the fault code.
Fault code No. 43
Fault code No.
Item
Fail-safe system
Diagnostic code No.
09 Meter display
Procedure
Actuation
50
Procedure
Item Probable cause of
malfunction and check
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).
42
Rear wheel sensor: no normal signals are received from the rear
A
wheel sensor.
B Neutral switch: open or short circuit is detected.
C Clutch switch: open or short circuit is detected.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-180.
43

Fuel system voltage: incorrect voltage supplied to the fuel injector

and fuel pump.
Able to start engine
Able to drive vehicle
09, 50
Fuel system voltage (battery voltage)
Approximately 12.0
Set the start/engine stop switch to "
measured battery voltage with the meter display value. (If the actually
measured battery voltage is low, recharge the battery.)
Actuates the relay unit five times at one-second intervals.
Illuminates the engine trouble and system warning light.
Check that the relay unit is actuated five times by listening for the operat-
ing sound.
Maintenance job
Improperly connected
nect the coupler securely or
replace the wire harness.
8-88
FUEL INJECTION SYSTEM
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".
", and then compare the actually
Confirmation of service com-
Con- Start the engine and let it idle for
approximately 5 seconds.
Fault code number is not dis-
played Service is finished.
Fault code number is displayed
Go to item 2.
pletion