Troubleshooting Details - Yamaha YFM70RY Service Manual

Diag-
nostic
code
No.
d30 Ignition coil
d36 Injector
d50 Fuel injection system
d51 Radiator fan motor relay
EAS27481

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 have been completed, reset the meter display
according to the reinstatement method.
Fault code No.:
Code number displayed on the meter when the engine failed to work normally. Refer to "Self-Diagnostic
Function table".
Diagnostic code No.:
Diagnostic code number to be used when the diagnostic mode is operated. Refer to "DIAGNOSTIC
MODE" on page 8-33.
Item
Actuates the ignition coil five
times in one-second inter-
vals.
The engine trouble warning
light also flashes five times.
Actuates the injector five
times in one-second inter-
vals.
The engine trouble warning
light also flashes five times.
Actuates the fuel pump relay
five times in one-second in-
tervals.
The engine trouble warning
light also flashes five times.
(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).
Actuates the radiator fan mo-
tor relay and illuminates the
engine trouble warning light
five cycles (5 seconds per
cycle-2 seconds ON, 3 sec-
onds OFF).
FUEL INJECTION SYSTEM
Actuation
8-38
Checking method
Check that the ignition coil
actuates five times by
watching for the spark.
• Connect an ignition
checker.
Check that the injector ac-
tuates five times by listen-
ing for the operating sound.
Check that the fuel pump
relay actuates five times by
listening for the operating
sound.
Check that the radiator fan
motor relay actuates five
times by listening for the
operating sound.