Motor not running (Operating sound of magnetic switch heard)
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
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 control relay (for K9K Engine), 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.
1) Condition of trouble
2) Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
3) Discharge of battery
4) Mounting of starting motor
For M13 Engine
Condition Possible Cause Action
Motor not running (Operating sound of magnetic switch heard)
Battery run down
Recharge battery.
Battery voltage too low due to battery deterioration
Replace battery.
Loose battery cable connections
Burnt main contact point, or poor contacting action of magnetic switch
Replace magnetic switch.
Brushes are seating poorly or worn down
Repair or replace.
Weakened brush spring
Burnt commutator
Replace armature.
Layer short-circuit of armature
Crankshaft rotation obstructed