Yamaha XF50W Service Manual page 266

Fault code No. 43
Used diagnostic code No. D09 (fuel system voltage)
Inspection operation item and
Order
probable cause
1 1 1 Connected condition of con-
nector
Inspect the coupler for any
pins that may have pulled
out.
Check the locking condition
of the coupler.
2 2 2 Faulty battery
3 3 3 Open or short circuit in wiring
harness.
Fault code No. 44
Used diagnostic code No. D60 (EEPROM improper cylinder indication)
Inspection operation item and
Order
probable cause
1 Malfunction in ECU
FUEL INJECTION SYSTEM
Power supply to the fuel injector, fuel pump and ignistion coil are not
Symptom
Operation item and countermeasure
If there is a malfunction, repair it and connect
it securely.
ECU coupler
Replace or charge the battery.
Refer to "CHECKING AND CHARGING THE
BATTERY" in chapter 3.
Execute the diagnostic mode (code No. D09)
NOTE:
When the leads are disconnected, the volt-
age check by the code No. D09 is impossable.
Repair or replace if there is an open or short
circuit.
8 Between battery and main switch
red-red
8 Between main switch and handlebar switch
(engine stop switch)
brown-brown
8 Between handlebar switch (engine stop
switch) and ECU
red/white-red/black
Error is detected while reading from or writing on EEROM (code re-
Symptom
registering key code and throttle valve fully closed notification valve).
Operation item and countermeasure
Execute the diagnostic mode (code No. D60)
8 01 is displayed on meter.
Readjust the CO of the displayed cylin-
der.
Refer to "ADJUSTING THE EXHAUST
GAS VOLUME" in chapter 3.
Replace ECU if defective.
normal.
7-23
FI ifl
Reinstatement
method
Reinstated by start- Reinstated by start- Reinstated by start-
ing the engine and ing the engine and ing the engine and
operating it at idle. operating it at idle. operating it at idle.
Reinstatement
method
Reinstated by turn-
ing the main switch
ON.