Starting motor running, but not cranking engine

Possible symptoms of starting system trouble are 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 in which of the battery, wiring harness, starting motor (including magnetic switch) and engine the cause of each trouble lies.

Before removing the starting motor, check the following items to identify most possible cause of trouble.

1)Condition of trouble

2)Tightness of battery terminals (including ground cable connection on engine) and starting motor terminals

3)Discharge of battery

4)Mounting of starting motor

Condition	Possible Cause	Action
Starting motor running, but not cranking engine	Worn pinion tip	•Non-ENG A-STOP model: Replace overrunning clutch. •ENG A-STOP model: Replace starting motor.
	Poor sliding of overrunning clutch	•Non-ENG A-STOP model: Check overrunning clutch. •ENG A-STOP model: Replace starting motor.
	Slipping overrunning clutch	•Non-ENG A-STOP model: Replace overrunning clutch. •ENG A-STOP model: Replace starting motor.
	Worn teeth of ring gear	Replace flywheel (M/T model) or drive plate (A/T model).