Suzuki SY413 Service Manual page 3335

6G3-4 CRANKING SYSTEM
Possible symptoms due to starting system trouble would be as follows:
D Starting motor does not run (or runs slowly)
D Starting motor runs but fails to crank engine
D Abnormal noise is heard
Proper diagnosis must be made to determine exactly where the cause of each trouble lies ..... in battery, wiring
harness, (including starting motor 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.
D Condition of trouble
D Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
D Discharge of battery
D Mounting of starting motor
Condition
Motor not running No operating sound of magnetic switch
D Shift lever switch is not in P or N, or not adjusted (A/T)
D Battery run down
D Battery voltage too low due to battery deterioration
D Poor contact in battery terminal connection
D Loose grounding cable connection
D Fuse set loose or blown off
D Poor contacting action of ignition switch and magnetic
D Lead wire coupler loose in place
D Open-circuit between ignition switch and magnetic
D Open-circuit in pull-in coil
D Brushes are seating poorly or worn down
D Poor sliding of plunger and/or pinion
Operating sound of magnetic switch heard
D Battery run down
D Battery voltage too low due to battery deterioration
D Loose battery cable connections
D Burnt main contact point, or poor contacting action of
D Brushes are seating poorly or worn down
D Weakened brush spring
D Burnt commutator
D Layer short-circuit of armature
D Crankshaft rotation obstructed.
DIAGNOSIS
Possible Cause
switch
switch
magnetic switch
Correction
Shift in P or N, or adjust switch.
Recharge battery.
Replace battery.
Retighten or replace.
Retighten.
Tighten or replace.
Replace.
Retighten.
Repair.
Replace magnetic switch.
Repair or replace.
Repair.
Recharge battery.
Replace battery.
Retighten.
Replace magnetic switch
Repair or replace.
Replace.
Replace armature.
Replace.
Repair.