Yamaha FZ8NA Service Manual page 490

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
d:09
Procedure
Actuation
d:50
Procedure
Item/components and
probable cause
4 Fuel pump relay malfunction Check in the diagnostic mode
5 Fuel pump relay malfunction Check in the diagnostic mode
6 ECU malfunction
43
Fuel system voltage: incorrect voltage supplied to the fuel injector,
fuel pump and main relay.
Able to start engine
Able to drive vehicle
d:09, d:50
Fuel system voltage (battery voltage)
Approximately 12.0
Set the engine stop switch to "
measured battery voltage with the meter display value. (If the actu-
ally measured battery voltage is low, recharge the battery.)
Actuates the main relay five times at one-second intervals.
Illuminates the engine trouble warning light. (The engine trouble
warning light is off when the relay is on, and the engine trouble
warning light is on when the relay is off.)
Check that the main relay is actuated five times by listening for the
operating sound.
Check or maintenance job
(Code No. d50).
No operation sound of fuel
pump relay is heard. →
Replace the relay unit.
(Code No. d09)
Fuel-related voltage: 3 V or
less → Replace the relay unit.
Replace the ECU.
FUEL INJECTION SYSTEM
", and then compare the actually
8-95
Sensor inspection proce-
dure
Place the main switch to the
ON position for approxi-
mately 5 seconds.
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.
Place the main switch to the
ON position for approxi-
mately 5 seconds.
Then, check the fault code
indication.
No fault code indicated. →
Recovered.
Fault code indicated. →
Check the next step.