Fault Code 43 - Yamaha FZ8NA Service Manual

Fault code No.
Item
Fail-safe system
Diagnostic code No.
Meter display
d:09
Procedure
Actuation
d:50
Procedure
Item/components and
probable cause
1 Connection of main relay
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
between the battery, fuel
injection system fuse, relay
unit and ECU
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
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Poor connection → Connect it
securely, or repair/replace the
wire harness.
Open or short circuit →
Replace the wire harness.
Red–Red
Red/blue–Red/blue
FUEL INJECTION SYSTEM
", and then compare the actually
8-94
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 indicated. → Recov-
ered.
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 indicated. → Recov-
ered.
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.