Yamaha MT-01 T 2005 Service Manual page 376

Fault code No. 46
Diagnostic code No.
Order Item/components and probable
cause
1 Connections
• Main wire harness ECU coupler
2 Faulty battery.
3 Malfunction in rectifier/regulator
4 Open or short circuit in wire harness.
Fault code No. 50
Diagnostic code No.
Order Item/components and probable
cause
1 Malfunction in ECU.
Symptom Power supply to the fuel injection system is not normal.
— —
Symptom Faulty ECU memory. (When this malfunction is detected in
the ECU, the fault code number might not appear on the
meter.)
— —
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the coupler for any pins
that may be pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler
securely.
• Replace or change the battery
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 7-94.
• Replace if defective.
Refer to "CHARGING
SYSTEM" on page 7-11.
• Repair or replace if there is an
open or short circuit.
• Between battery and main
switch
(red–red)
• Between main switch and
ignition fuse
(brown/blue–brown/blue)
• Between ignition fuse and ECU
(red/white–red/white)
Check or maintenance job
Replace the ECU.
NOTE:
Do not perform this procedure
with the main switch turned to
"ON".
7-61
Reinstatement
method
Starting the
engine and
operating it at
idle.
Reinstatement
method
Turning the
main switch to
"ON".