Chapter 30 Engine Starting Systems 513
Technical Terms
Write the defi nitions for the following terms on a
separate sheet of paper.
Activities
1. If possible, obtain an unserviceable 12-volt
starter motor from a shop or junkyard.
Carefully disassemble and clean the
components. Mount and label them for a
classroom display.
2. Research the advantages and
disadvantages of installing a rebuilt 12-volt
starter (rather than a new one) in a vehicle.
Report to the class.
3. Inspect a hybrid vehicle’s starting system.
Find out if it uses a 12-volt starting motor
or the hybrid motor-generator to crank the
engine for starting. Write a report on the
hybrid starting system using factory service
information as a reference.
Review Questions
Answer the following questions using the
information provided in this chapter.
1. List and describe the six major parts of a
12-volt starting system.
2. What is the purpose of the starting motor?
3. Which of the following is not part of a
starting motor?
(A) Armature.
(B) Field winding.
(C) Commutator.
(D) Slip ring.
4. List the four parts of a starter armature.
5. The housing around the starting motor
pinion gear is called the _____.
(A) center frame
(B) brush end frame
(C) drive end frame
(D) fi eld frame
6. What is the function of the starter pinion
gear?
7. The _____ allows the pinion gear to turn
the fl ywheel ring gear for starting.
8. The _____ is a high-current relay that
completes the circuit between the battery
and the starting motor.
9. Describe how a movable pole shoe starting
motor operates.
10. A starter-actuated solenoid has a(n) _____
that moves a shift lever to engage the
pinion gear.
11. Why is a reduction starter sometimes used?
12. The _____ keeps the engine from cranking
unless the shift selector is in neutral or
park.
13. List the fi ve major components of a hybrid
starting system.
14. Three HV power cables connect the HV
power control module to the motor-
generator. True or False?
15. Which of the following detects a need to
start or stop the engine in a hybrid starting
system?
(A) Motor-generator.
(B) ECM.
(C) Hybrid control module.
(D) None of the above.
12-volt starting system
armature core
armature motor shaft
battery
brushes
commutator
ECM-controlled starting
circuit
engine control module
(ECM)
engine starting system
fi eld windings
ignition switch
like charges
magnetic fi eld
movable pole shoe
starting motor
neutral safety switch
overrunning clutch
permanent-magnet
starters
pinion gear
pole shoes
reduction starter
relay
solenoid disc
solenoid windings
start switch
starter-actuated
solenoid
starter armature
starter relay
starter solenoid
starting motor
unlike charges