Starter Motor Will Not Run; Starter Motor Runs But Does Not Crank The Engine - Suzuki GSX-R750 Service Manual

Starter Motor Will Not Run

NOTE
Make sure the fuses are not blown and the battery is fully-charged before diagnosing.
Troubleshooting
Step
1 1) Shift the transmission into neutral.
2) Grasp the clutch lever, turn on the ignition switch with
the engine stop switch in the "RUN" position and listen
for a click from the starter relay when the starter button is
pushed.
Is the click sound heard?
2 Check if the starter motor runs when its terminal is
connected to the battery (+) terminal. (Do not use thin "wire"
because a large amount of current flows.)
Does the starter motor run?
3 Measure the starter relay voltage at the starter relay terminal
(between Y/G (+) and B/Y (–)) when the starter button is
pushed.
Is the voltage OK?
4 Check the starter relay. Refer to "Starter Relay Inspection
(Page 1I-7)".
Is the starter relay OK?

Starter Motor Runs But Does Not Crank The Engine

The starter motor runs when the transmission is in neutral, but does not run when the transmission is in any position
other than neutral, with the side-stand up.
Step
1 Check the side-stand switch. Refer to "Side-stand / Ignition
Interlock System Parts Inspection (Page 1I-8)".
Is the side-stand switch OK?
2 Check the starter clutch. Refer to "Starter Clutch Removal
and Installation (Page 1I-10)".
Is the starter clutch OK?
Action
Action
Yes
Go to Step 2.
• Faulty starter relay.
• Loose or
disconnected starter
motor lead wire.
• Loose or
disconnected
between starter relay
and battery (+)
terminal.
Go to Step 4.
Poor contact of the
starter relay.
Yes
Go to Step 2.
• Open circuit in wire
harness.
• Poor contact of
connector.
Starting System: 1I-2
B838H21904002
No
Go to Step 3.
Faulty starter motor.
• Faulty ignition switch.
• Faulty engine stop
switch.
• Faulty clutch lever
position switch.
• Faulty gear position
switch.
• Faulty turn signal/
side-stand relay.
• Faulty starter button.
• Faulty side-stand
switch.
• Poor contact of the
coupler.
• Open circuit in wire
harness.
Faulty starter relay.
B838H21904003
No
Faulty side-stand
switch.
Faulty starter clutch.