Yamaha 2005 MT-01, Service Manual

Page: 354 / 435

FUEL INJECTION SYSTEM
7-39
EAS27460
TROUBLESHOOTING DETAILS
This section describes the measures per fault code number displayed on the meter. Check and service
the items or components that are the probable cause of the malfunction following the order given.
After the check and service of the malfunctioning part has been completed, reset the meter display ac-
cording to the reinstatement method.
Fault code No.:
50 Fuel pump relay
Actuates the fuel pump relay
for five times every second.
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 the operating sound
of the fuel pump relay five
times.
51
Muffler cooling fan motor
relay
Actuates the muffler cooling
fan motor relay for five cycles
of five seconds. (ON 2
seconds, OFF 3 seconds)
Illuminates the engine
trouble warning light.
Check the operating sound
of the muffler cooling fan
motor relay five times.
52 Headlight relay
Actuates the headlight relay
for five cycles of five
seconds. (ON 2 seconds,
OFF 3 seconds)
Illuminates the engine
trouble warning light.
Check the operating sound
of the headlight relay five
times.
54 ISC valve
Actuates and fully closes the
ISC valve, then opens it to
the standby opening position
when the engine is started.
This operation takes
approximately 12 seconds
until it is completed.
Illuminates the engine
trouble warning light.
The ISC unit vibrates when
the ISC valve operates.
55 Decompression solenoid
Actuates the decompression
solenoid for five cycles of five
seconds. (ON 2 seconds,
OFF 3 seconds)
Illuminates the engine
trouble warning light.
NOTE:
Be sure to push the start
switch, otherwise the above
mentioned operation will not
be possible.
Check the operating sound
of the decompression
solenoid five times.
NOTE:
Disconnect the starter
motor lead before
performing this procedure.
Diag-
nostic
code
No.
Item Actuation Checking method