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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 K9K 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
Retighten.
Burnt main contact point, or poor contacting action of magnetic switch
Replace starting motor.
Brushes are seating poorly or worn down
Replace starting motor.
Weakened brush spring
Replace starting motor.
Burnt commutator
Replace starting motor.
Layer short-circuit of armature
Replace starting motor.
Crankshaft rotation obstructed
Repair.