Suzuki WagonR+ RB310 Service Manual page 2641

6G-4 CRANKING SYSTEM
Condition
Motor not running
Starting motor running
but too slow (small torque)
Starting motor running,
but not cranking engine
Noise
Starting motor does not
stop running
Possible Cause
D Burnt commutator
D Grounding of field coil
D Layer short-circuit of armature
D Crankshaft rotation obstructed
If battery and wiring are satisfactory,
inspect starting motor
D Insufficient contact of magnetic switch
main contacts
D Layer short-circuit of armature
D Disconnected, burnt or worn commutator
D Worn brushes
D Weakened brush springs
D Burnt or abnormally worn end bush
D Worn pinion tip
D Poor sliding of over-running clutch
D Over-running clutch slipping
D Worn teeth of ring gear
D Abnormally worn bush
D Worn pinion or worn teeth of ring gear
D Poor sliding of pinion (failure in return
movement)
D Worn internal or planetary gear teeth
D Lack of oil in each part
D Fused contact points of magnetic switch
D Short-circuit between turns of magnetic
switch coil (layer short-circuit)
D Failure of returning action in ignition
switch
Correction
Replace armature.
Repair.
Replace.
Repair.
Replace magnetic switch.
Replace.
Replace armature.
Replace brush.
Replace spring.
Replace bush.
Replace over-running clutch.
Repair.
Replace over-running clutch.
Replace flywheel (M/T) or
drive plate (A/T).
Replace bush.
Replace over-running clutch,
flywheel (M/T) or drive
plate (A/T).
Repair or replace.
Replace.
Lubricate.
Replace magnetic switch.
Replace magnetic switch.
Replace.