Starting System: Description and Operation

The starting system consists of the:
- Starter motor.
- Starter switch, part of the ignition switch.
- Digital Transmission Range (DTR) sensor.
- Starter motor solenoid relay switch.
- Starter solenoid.
- Starter drive.






The starter motor:
- Is a permanent magnet, gear reduction, 12 V DC motor.
- Has an integral starter solenoid.
- Has an over-running clutch in the starter drive.







The starter motor solenoid relay switch:
- Controls current to the starter solenoid.
- Is engaged by the ignition switch.
- Connects the battery to the starter motor.






The starter drive:
- Is operated by the starter solenoid.
- Engages the flywheel to turn the engine.
- Has an internal over-running clutch to disengage the starter motor when the engine starts.






The starter solenoid:
- Is an electromagnet.
- Engages the starter drive to the flywheel.
- When energized, the contacts close, connecting the battery to the starter motor. This causes the starter motor to turn the starter drive.
- Is kept in the energized condition by a hold-in winding until the starter switch is released.