Ase test Flashcards
i,v,r stands for what?
Amps, Volts, Resistance (ohms)
How to connect an Ammeter
Put it in circuit
How to connect a Voltmeter
Provide power and ground.
How to connect an Ohmmeter (3 steps)
Press the leads together, make sure what your ohming out is out of the circuit. Test the ends on the power and ground of what your testing.
Parts of a Transistor
Emitter, Base, Collector
5 Parts of a circuit
Power, load, circuit protection, control, conductor
100 mV
0.1 Volts
120 mA
.120 Amps
what is MV and mV
M is Mega, m is milli
A circuit has 5 different resistors with all different resistances (5 ohm, 14 ohms, 25 ohms ect…) What is the resistance of the circut?
Less then the least resistor.
Which post on a battery is bigger?
Positive
What does CCA stand for?
Cold Cranking Amps
Does it matter which side you test for amps on a circuit? Why?
No. Amps stay the same throughout the whole circuit.
When load testing a battery how many Amps do you test it with?
half the number of the batteries CCA
When load testing how long do you hold it until reading?
15 seconds.
What is the lowest the battery is allowed to drop?
9.6 volts or more
How charged must the battery be when load testing?
75% soc or 12.4v
When charging a battery what number of volts is to not be exceeded?
16 volts.
What are electrolytes composed of
Sulfuric acid and water.
What side of the battery do you amm test when doing a drain or draw test
Ground
Parasitic draw test protocol
Take the key out of the ignition, break the circuit, and test on the ground cable to see if there is an excessive draw.
how long should a battery last
3-5 years
The starter can either be connected to what two gears?
Flywheel or Flex plate
What is a pinion gear?
The pinion gear is the small gear that is pushed out to turn the fly wheel or flex plate to turn it when trying to start the engine
What keeps the starter turning?
Magnets.
What is a solenoid?
a big electro magnet
How many wires are on the starter?
Three. Battery,key, and ground to itself.
Where is the starter solenoid located?
On top of the starter
When testing a starter under the no crank condition make sure of what two things?
No sound comes from the starter, and the battery is at 75%.
What would cause a slow crank no start condition?
The Starter isn’t getting enough power
How do you test a starter?
you connect one test lead of the multimeter to the ground side of the batt and the other to the power cable on the starter coming from the battery.
What are the major parts of an alternator?
Rotor, Stator, rectifier bridge.
What is rectification
Turns ac into dc
What is a diode?
A one-way valve (electricity can only flow one way when a diode is there)
What is a normal charging system voltage
13.5 v - 15v
What is a sense wire in reference to an alternator?
It tells the alternator when to push more volts into the battery.
With what do you test the charging system? How do you test it?
connect the VAT 40 to the positive and negative on the battery then connect the inductor wire to the power wire that goes back to the battery.
Can you volt-test the alternator? If you can how many volts are you allowed to lose?
You can. you are allowed to lose anything under 0.05 volts.
What to what must be connected when testing voltage drop?
Positive to positive or negative to negative.
How do you know if the alternator is undercharging?
It must read within 10% of the alternator rating.
Engine off key on, engine on key on, or key off when voltage testing an alternator
The engine on key on
What is full fielding?
Putting a load on the alternator to see if it can handle it.
