Starting System: Description and Operation
GENERAL INFORMATIONIntroduction
Starting System Components - Automatic:
Starting System Components - Manual:
The starting system has:
- Ignition switch
- Starter relay
- Park/Neutral Starting Back-Up Lamp Switch with automatic transmissions
- Clutch Interlock/Upstop Switch with manual transmissions
- Powertrain Control Module (PCM) for double start over ride
- Wiring harness
- Battery
- Starter motor with an integral solenoid
These components form two separate circuits. A high amperage circuit that feeds the starter motor up to 300+ amps, and a control circuit that operates on less than 20 amps.
The Powertrain Control Module (PCM) controls a double start over ride safety that does not allow the
Supply Circuit And Control Circuit
The starter system consists of two separate circuits:
- A high amperage supply to feed the starter motor.
- A low amperage circuit to control the starter solenoid.
STARTER MOTOR
The starter is a permanent magnet starter motor. The fields have six permanent magnets. A planetary gear train transmits power between starter motor and pinion shaft. The starter provides mechanical torque to rotate the crankshaft at an RPM (crank speed) necessary for self-sustained spark/ignition.