Suzuki RA410 Manual page 460

6G-4 CRANKING SYSTEM
Possible symptoms due to starting system trouble would be as follows.
Starting motor does not run (or runs slowly)
Starting motor runs but fails to crank engine
Abnormal noise is heard
Starting motor does not stop running
Proper diagnosis must be made to determine exactly where the cause of each trouble lies ..... in battery, wiring
harness, (including ignition and starter switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope
of possible causes.
Condition of trouble
Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
Discharge of battery
Mounting of starting motor
Condition
Motor not running
Motor not running
Possible Cause
No operating sound of magnetic switch
Select lever is not P or N, or transmission range
sensor is not adjusted (A/T)
Battery run down
Battery voltage too low due to battery deteriora-
tion
Poor contact in battery terminal connection
Loose grounding cable connection
Fuse set loose or blown off
Poor contacting action of ignition switch
Lead wire coupler loose in place
Open-circuit between ignition switch and magnet-
ic switch
Open-circuit in pull-in coil
Brushes are seating poorly or worn down
Poor sliding of plunger
Operating sound of magnetic switch heard
Battery run down
Battery voltage too low due to battery deteriora-
tion
Loose battery cable connections
Burnt main contact point, or poor contacting ac-
tion of magnetic switch
Brushes are seating poorly or worn down
Weakened brush spring
Burnt commutator
Field coil grounding
Layer short-circuit of armature
Crankshaft rotation obstructed
DIAGNOSIS
Correction
Shift in P or N, or adjust.
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair or replace.
Replace.
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch.
Repair or replace.
Replace.
Replace armature.
Repair or replace yoke.
Replace.
Repair.