During battery diagnosis, it is important to make sure that the battery is charged. When the switch is operated, and the starter fails to turn on, make sure that the shift lever is in Neutral or Park when using an automatic transaxle, or that the clutch pedal is released when using a manual transaxle. Ensure that the battery is charged and that all cables at the battery and starter solenoid terminals are clean and are in place. When the starter is rotating and yet the engine fails to crank, then the over running clutch of the starter is slipping and, therefore, the starter requires replacement. When the starter is not working at all and the solenoid clicks upon the switching, it can be the battery, the primary solenoid contacts, or the starter, or the engine may have seized. When the solenoid plunger cannot be heard when turning the switch, the battery can be faulty, the circuit may be open or the starter solenoid could be faulty. To test the solenoid, jumper lead with battery positive to the ignition switch terminal of the solenoid, this time the solenoid should be working and therefore there must be an issue with the ignition switch, Neutral start switch or wiring. In the event that the starter remains inoperative, pull out starter/solenoid assembly, disassemble, test and repair it. When cranking the engine with an abnormally slow rate, verify that the battery is charged, that all the terminal connections are firmly secured; partial seizure of the engine, or inappropriate viscosity of the oil can be reasons that make it not crank. Start the engine until it gets to normal operating temperature and then remove the coil wire off the distributor cap and ground it on the engine. Connect the positive lead of a voltmeter to the positive post of the battery and the negative connection to the negative post. Turn on the engine, and record voltmeter readings as soon as a constant value is registered, without taking longer than 15 seconds of starter action at once. The normal cranking speed is a reading of nine volts and above; a reading of nine volts and above but with a slow cranking rate then the motor is defective. This is because, when the reading is lower than nine volts and the cranking speed is slow, the solenoid contacts might be burned, the starter might be faulty, the battery might have been discharged or the connection could be faulty.