The starter motor is a gear reduction type. A gear reduction
type starter motor is made up of the following components:
The reduction gears reduce armature rotation by approximately 25%. Armature
rotation is transmitted to the pinion through the clutch mechanism.
When the ignition switch is in RUN or START, the theft deterrent module
receives two inputs:
If the correct resistance is detected, the theft deterrent module will:
| • | Energize the theft deterrent relay |
| • | Close the circuit between the ignition switch and the starter
motor solenoid |
As the ignition is turned to START, and the vehicle is in PARK or NEUTRAL,
battery voltage is supplied to the starter solenoid switch. The starter solenoid
switch then moves the starter shift lever, causing the starter drive pinion
to engage the flywheel ring gear. After engagement, the switch closes the
main contacts, causing engine cranking. When the engine starts, the pinion
overrun protects the armature from excessive speed until the switch is opened.
The switch plunger spring then disengages the pinion. The ignition switch
opens immediately after the engine starts, which prevents excessive overrun.
