ASE A5 - key notes

Question 1

the metering valve

Answer 1

holds off pressure on the front brakes ever so slightly to allow the rear drums brakes to engage first

Question 2

the pressure differential valve

Answer 2

is the device that alerts you if you have a leak in one of the brakes circuits

Question 3

brake proportioning valve

Answer 3

are the parts of a vehicle’s brake system that limit the amount of pressure reaching the rear brakes, which helps to prevent rear wheel lock up.

Question 4

master cylinder

Answer 4

can cause LOW brake pedal/ fades pedal to the floorboard when leaking cup seals.

Question 5

low intake manifold/vacuum/clogged check valve

Answer 5

can all cause HARD brake pedal

Question 6

sticking caliper piston seal

Answer 6

will make one brake rotor hotter than the others

Question 7

residual check valve

Answer 7

used on DRUMS system to keep 5-12 psi on wheel cylinder cup seals/ can also cause SPONGY pedal

Question 8

break accumulators

Answer 8

are found on Integral & NON- integral ABS/ stores pressures

Question 9

double- walled STEEL tubing

Answer 9

always used to repair damaged section of Brake line

Question 10

Brake Drag

Answer 10

can be caused by Weak return spring/ Twisted brake hose

Question 11

dial indicator

Answer 11

check Lateral runout (WARPAGE) of rotor

Question 12

outside micrometer

Answer 12

check Thickness of rotor

Question 13

if you open the Bleeder and there isn’t fluid passing to the brake caliper- there is ________ on the hose

Answer 13

RESTRICTION

Question 14

Short Push Rod

Answer 14

will result in excessive pedal travel

Question 15

Air in the Hydraulic system

Answer 15

will cause SPONGY brake pedal

Question 16

Free play brake pedal

Answer 16

pressure build up/ dragging brakes

Question 17

Defective one-way check valve in Booster vacuum hose

Answer 17

will cause brake fluid into engine

Question 18

Seized Caliper Piston

Answer 18

will NOT cause LOW brake pedal

Question 19

Caliper- integrated parking brakes (EPB)

Answer 19

Does NOT use Hand-operated lever.


Question 20

Excessive pedal travel

Answer 20

can be caused by Incorrect adjustment on Master Cylinder pushrod

Question 21

Dot 3 & 4 Brake Fluid

Answer 21

is Hygroscopic, which means they absorb moisture.


Question 22

Dot 5 Brake Fluid

Answer 22

is Silicon, High boiling point/ does not attract water

Question 23

4 different methods for Bleeding Brakes

Answer 23

manual, pressure, vacuum, and surge

Question 24

SINGLE channel ABS system

Answer 24

installed on rear wheels only

Question 25

FOUR channel ABS sensors

Answer 25

will have 4-wheel speed sensors, one for each wheel

Question 26

Silicone based brake grease

Answer 26

Is the type of Lubricant you use on brakes

Question 27

Wheel torque that is TOO Tight

Answer 27

could cause warp on brake rotors/ pedal pulsation

Question 28

Hydro-Boost

Answer 28

Power Steering issue

Question 29

Worn Brake Pedal Linings

Answer 29

causes NOISE not pulsation

Question 30

ABS LIGHT

Answer 30

wheel speed sensor issue

Question 31

Red Brake LIGHT

Answer 31

hydraulic problem such as low fluid or LOSS of pressure

Question 32

Brake pedal fade

Answer 32

can also be caused by Brake drum beyond its machined limit

Question 33

Vacuum supply test

Answer 33

Involves inspecting the vacuum supply hose for kinks & checking the level of vacuum supplied by the engine or vacuum pump

Question 34

2 main types of flares for brake lines

Answer 34

Bubble & Double Flare