Starting System: Description and Operation

Starting System

COMPONENT LOCATION





INTRODUCTION
The starter motor is manufactured by Denso and is rated at 1.4 kW. The motor is geared directly to the pinion. The motor is a series wound motor with an overrunning clutch. The interior of the motor is ventilated through a breather tube attached to the rear of the engine.
The starter motor is located on the rear right side of the engine sump. The motor is installed in an aperture in the sump and the pinion is engaged with the ring gear of the crankshaft drive plate.
A heavy duty cable, which supplies the electrical power to turn the starter motor, is connected to the battery positive terminal via 500 A megafuse.
At the starter motor, the cable is connected to a terminal stud on the solenoid. The power feed from the starter relay, to energize the solenoid, is connected to a second terminal stud on the solenoid.

Starter Motor Assembly









CONTROL DIAGRAM

NOTE:
A = Hardwired.









OPERATION
Engine crank requests are monitored by the passive anti-theft system and, if valid, passed on to the ECM (engine control module). For additional information, refer to Anti-Theft - Passive
When the ECM (engine control module) receives a crank request, it energizes the starter relay in the EJB (engine junction box). The energized starter relay supplies 12 V power to energize the pull-in coil of the starter solenoid. Once activated, the pull-in coil engages the solenoid plunger, which engages the pinion gear with the ring gear. The plunger then closes the solenoid circuit, feeding power from the 500 A megafuse on the battery positive terminal to the starter motor.