Yamaha XF50W Service Manual page 267

Fault code No. 46
Used diagnostic code No. --
Inspection operation item and
Order
probable cause
1 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 2 Faulty battery
3 3 3 3 Malfunction in rectifier/ regula-
tor
4 4 4 4 Open or short circuit in wiring
harness.
Fault code No. 50
Used diagnostic code No. --
Inspection operation item and
Order
probable cause
1 Malfunction in ECU
FUEL INJECTION SYSTEM
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.
Replace if defective.
Refer to "CHARGING SYSTEM" in chapter 8.
Repair or replace if there is an open or short
circuit.
Between battery and ECU
red-red
Faulty ECU memory. (when this malfunction is detected in the ECU, the
Symptom
Operation item and countermeasure
Replace the ECU.
Power supply to FI system is not normal. (red lead)
fault code number might not appear on the meter.)
7-24
FI ifl
Reinstatement
method
Reinstated by start- Reinstated by start- Reinstated by start- Reinstated by start-
ing the engine and ing the engine and ing the engine and ing the engine and
operating it at idle. operating it at idle. operating it at idle. operating it at idle.
Reinstatement
method
Reinstated by turn-
ing the main switch
ON.