Yamaha 250GETO Service Manual page 279

Troubleshooting the power unit (trouble code not available)
The trouble shooting when a trouble code is not available consists of the following 4 items.
Symptom 1: Specific trouble conditions
Symptom 2: Trouble conditions of an area or individual part
Cause 1: The content considered as the trouble factors of symptom 2.
Cause 2: The content considered as the trouble causes of cause 1 (described if necessary).
Symptom 1: Engine does not crank
Symptom 2
Discharged battery
Loose connection of
battery terminal
Short, open, or loose
connection in starter
motor circuit
Starter motor
Starter relay
does not
malfunction
operate
Blown fuse (80A)
Starter motor
malfunction
Engine start switch
malfunction
Gear shift not in the
neutral position
Stuck piston
Starter motor
operates, but
Piston lock due to
the engine does
water or oil in the com-
not crank
bustion chamber
*1 See the wiring diagram
6S35H11
Cause 1 Cause 2
Troubleshooting the power unit
Checking step
Check the battery for
— electrolyte level, gravity
and voltage.
Check the battery
—
terminal.
Check the wiring har-
—
ness continuity.
— Check the starter relay.
— Check the fuse (80A).
Disassemble and
—
check the starter motor.
Check the engine start
—
switch.
Shift the remote control
—
lever to neutral.
Disassemble and
—
check the power unit.
1
2
Refer
to
page
3
3-14
—
4
*1
8-16
5
8-15
8-18
6
8-15
3-9
7
5-29
8
9
9-2