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PURPOSE The vehicles starting system is designed to turn or crank engine over.
Starting system What are some of the starting system components.
6 basic components 1) Battery 2) Ignition switch 3)Battery cables 4)Starter motor assembly 5)Starter safety switch 6) Flywheel assembly Manual vehicle and some automatic transmission have safety switches.
Starter Average starter motor draws about 250Amps or more. This current flows through the large cables that connect the battery to the starter and ground.
Function The starter circuit has 2 separate circuits. 1) The control circuit 2) The starter circuit
The Control Circuit Connects battery power at the ignition switch to the magnetic switch which controls the high current to the starter motor.
The Starter Circuit Carriers the heavy current from the battery to the starter motor through a magnetic switch in a solenoid.
Starter Solenoid Receives a large electric current from the car battery and a small electric current from the ignition switch. When the ignition switch is turned on, a small electric current is sent to the starter solenoid. This causes the starter solenoid to close a pair of heavy contacts
Starting Safety Switch What is a Starting safety switch? Why do we need a starting safety switch?
Starting Safety Switch Also called a park neutral safety switch for automatic transmissions. Prevents the starting system from operating when the transmission is in gear. Switch in series with circuit. Clutch start switch used on manual transmission cars. Switch is mounted on clutch pedal.
Fly Wheel Attached to the end of the crankshaft. Large diameter, makes it easy for starter to engage and rotate engine through gear reduction
Starter failures What are some of the possible starting failures that may occur.
Starting circuit failures Starter solenoid. Starter safety switches. (PNP and clutch switch) Battery problems Starter motor.
Video http://www.youtube.com/watch?v=m1rVz3msbZ8 http://www.youtube.com/watch?NR=1&v=5qaYm4s_ksU