Deck 13: Starting and Charging System Diagnosis

Question 1

A battery conductance test is being performed and the test results shows that the battery is discharged. Technician A says that the battery may or may not need to be replaced. Technician B says that the battery should be charged and retested. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Answer 1

A

Question 2

Electrical resistance of the cranking and charging circuits is best determined by what type of test?

A) Resistance testing using an ohmmeter
B) Ammeter testing of the system to determine the current flow
C) Checking the wiring and cables with an ohmmeter
D) Voltage drop testing

Answer 2

D

Question 3

Battery testers usually use what battery rating?

A) CCA
B) Amp-hour
C) Reserve capacity
D) CA

Answer 3

A

Question 4

What type of meter can be used to measure battery drain, starter amperage draw, and alternator output without having to disconnect wiring connections?

A) Voltmeter
B) Ohmmeter
C) Clamp-on ammeter
D) Any of the above

Question 5

The purpose and function of a stop/start system is to ________.

A) reduce noise and vibration at idle
B) reduce noise, vibration, and harshness
C) improve fuel economy and reduce exhaust emissions
D) replace the starter motor saving weight

Question 6

Registering a new battery is sometimes needed because ________.

A) the number of cells of the replacement battery must be inputted into the PCM memory
B) it resets the algorithm back to optimal charging voltage
C) allows a different battery size to be used in the vehicle
D) the battery warranty may have expired

Question 7

An AGM battery should never be charged with more than ________ volts.

A) 14
B) 15
C) 12
D) All of these are too high

Question 8

Slow cranking can be caused by all of the following, EXCEPT ________.

A) corroded or dirty battery cables
B) open neutral safety switch
C) engine mechanical problems
D) a low or discharged battery

Question 9

If the starter turns slowly when engaged, a possible cause is ________.

A) a open ignition switch
B) a disconnected battery cable
C) a worn or defective starter
D) a defective solenoid

Question 10

The maximum acceptable AC ripple voltage is ________.

A) 0.050 V (50mV)
B) 0.400 V (400mV)
C) 0.010 V (10mV)
D) 0.100 V (100 mV)

Question 11

Technician A says that all battery connections should be tested for corrosion. Technician B says that battery cables showing corrosion may be caused by a sulfated battery. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B

Question 12

Which of these tests is specified by many manufacturers?

A) Conductance test
B) Resistance test
C) Reluctance test
D) Both A and B

Question 13

Which of these conditions will disable the vehicle stop/start system?

A) Hood open
B) Engine idling
C) Foot OFF of the accelerator pedal
D) Fully charged battery

Question 14

The voltmeter leads are connected as shown. A reading of 0.860 volts is observed while cranking the engine. What does this mean?

A) This is an inconclusive test
B) This is a normal reading
C) The battery needs to be charged
D) The cable and post need to be cleaned

Question 15

This voltage reading was obtained while cranking the engine. The indicated reading (0.816 V) is ________.

A) too high
B) too low
C) an inconclusive measurement
D) incorrectly done

Question 16

What test is being performed in this illustration?

A) Battery voltage test
B) Alternator output voltage drop test
C) Alternator ground circuit test
D) Charging current test