WorksheetsStarter final review
Total questions: 18
Worksheet time: 9mins
A voltmeter is able to:
Measure accurately how strong a battery is
Measure accurately how much resistance the battery has
Measure accurately the difference in voltage between two places in a circuit
All of the above
When trying to find the location of a high resistance in a high current circuit, such as a starter motor or defrost grid, the best test is:
Check the resistance with an ohmmeter
Check the voltage drop with a voltmeter
Check the amperage with an ammeter
Use a test light in place of the fuse to see if current is flowing
When testing the voltage drop of a starter motor - from the B+ terminal of the solenoid to the starter's case - you find 11.1 volts.
When testing cranking voltage at the battery, you find 11.3 volts.
What does this test indicate?
That there is no excessive resistance in the starter high current circuit
That there is excessive resistance in the cable form the positive terminal to the battery
That the battery is weak
That there is excessive resistance in the starter's ground
In a properly functioning starter circuit, what should the voltage reading be between point A and battery ground post with the starter energized?
6 volts
12 volts
depends on the amount of torque required by the starter
Less than 0.3 volts
In a properly functioning starter circuit, what should the voltage reading be between point A and point B with the starter energized?
6 volts
12 volts
depends on the amount of torque required by the starter
Less than 0.3 volts
In a properly functioning starter circuit, what should the voltage reading be between point B and point C with the starter energized?
6 volts
12 volts
depends on the amount of torque required by the starter
Less than 0.3 volts
In a properly functioning starter circuit, what should the voltage reading be between the negative battery post and point C with the starter energized?
6 volts
12 volts
depends on the amount of torque required by the starter
Less than 0.3 volts
If the starter's high current tests pass, what is the next step?
Clean all the high current connections and terminals to be certain they're ok
Replace the starter
Test the control circuit resistance with an ohmmeter
Test the control circuit by checking the voltage at the S terminal while an assistant turns the key to "start"
If the starter's high current tests show no voltage drop, and there is 12 volts supplied to the "S" terminal when the key is turned to "start", what is the next step?
Clean all the high current connections and terminals to be certain they're ok
Replace the starter
Test the control circuit resistance with an ohmmeter
Test the control circuit by checking the voltage at the S terminal while an assistant turns the key to "start"
When verifying the customer concern in the parking lot, you verify that the engine does not start. What's a quick easy test you can do from the driver seat?
Jump the S terminal to the battery terminal
Hit the starter with a hammer and try again
Shift the transmission into neutral and try to start it again
Remove all the fuses and check them for broken filaments
Service information indicates that a starter should draw 230 amps on initial engagement, and 180 amps continuous.
You test, and find that it draw no more than 80 amps, while cranking very slowly.
What is the next step?
Voltage drop test the high current circuit, as the test indicates a high resistance
Test the "S" terminal for power to ensure that the starter is being commanded on
Remove and inspect all fuses and relays
Hit the starter with a hammer while cranking to see if it speeds up
Service information indicates that a starter should draw 230 amps on initial engagement, and 180 amps continuous.
You test, and find that it draws 310 amps continuously, while cranking very slowly.
What is the next step?
Voltage drop test the high current circuit, as the test indicates a high resistance
Test the "S" terminal for power to ensure that the starter is being commanded on
Check the starter, engine, and belt driven components for high mechanical drag
Hit the starter with a hammer while cranking to see if it speeds up
A typical battery parasitic draw should be:
Less than 20mA
Less than 40 mA
Less than 50 mA
Less than 0.5A
A starter sounds like it engages, and the starter motor spins, but the engine fails to turn over.
What component is most likely responsible?
A failed overruning clutch/one way clutch
High resistance in the high current circuit
A failed solenoid
A faulty park/neutral safety switch
What is the configuration used in a starter's planetary gear set?
Input Sun
Output Planet Carrier
Held Ring
Input Ring
Held Planet Carrier
Output Sun
Input Planet Carrier
Output Sun
Held Ring
All of the above
Vehicles with auto start/stop systems typically have:
A large field coil type starter
Smaller flywheel to reduce gear ratio
An auxiliary power source such as an extra battery or capacitor, or a larger than normal AGM battery
A conventional old style PMG crankshaft position sensor
When is the pull in coil energized?
momentarily on initial energization of the solenoid only
During the whole cranking process
Whenever the car is in park or neutral
For 30 seconds after the engine starts
When is the hold in coil energized?
momentarily on initial energization of the solenoid only
During the whole cranking process
Whenever the car is in park or neutral
For 30 seconds after the engine starts
