If your brake pedal feels squishy, "like stepping on a plum," and won't stop on the way down unless you pump it, or the brake pedal sinks to the floor with little or no resistance, you have a dangerous situation and should NOT drive any further! d. Neither A nor B. Typically rusted rotors or drums only happen when a car has been sitting for a long period. Question: Sometimes when I apply the brakes, the pedal of my SUV goes very low before stopping completely. If it the booster, check valve, or vacuum hose is bad, it will likely also cause a vacuum leak and rough engine idle as well, but an engine with a bad valve or head gasket can also cause low vacuum which can effect the brake boost. A only In this article, I will explain the most common reason for a slipping automatic transmission and the most common reason for a slipping standard transmission. D. Neither Technician. The ABS warning light usually comes on when there is this type of problem. D. Neither technician. Correct answer B-If the amber light is on it indicates an ABS fault and the system will revert to regular brake operation without ABS. The brakes on quick take up systems use the same bleeding procedure as those without this valve. Tips and precautions to use when replacing your brake pads, so you can get quality results on a Honda or any other vehicle. b. A. auto tech review 3 Flashcards | Quizlet Correct answer B-Disc brake squeal is caused by the brake pad moving while braking. Bleed the brake lines as recommended by Chevy to fix this. The two main types of disc brake calipers are: The disc brake caliper is attached to the, Sliding calipers have pistons that are positioned on, bleed air or vacuum from the power booster, Brake bleeder screws enable all of the following tasks to be performed EXCEPT. c. Both A and B Hydro boost locking up breaks | Diesel Place To do this test, drive your car in a remote location with no traffic at a speed of about 30 miles an hour. D. Neither technician. What do you think it might be? Correct answer A-Air in the hydraulic system is the only choice that creates a spongy pedal. b. Wash in hot, soapy water and dry. The component in the Figure is involved what procedure? Technician A says that when reassembling a duo-servo brake, the backing plate pads should be lubricated. If you have rear disc brakes, this procedure may not work because some makes and models have a separate emergency brake, which is connected not to the rear rotor and caliper, but to a special drum inside the rear rotors with a separate braking system. Troubleshooting: Common Brake Issues and Causes It's good to understand what the cause of your problem might be before a mechanic starts talking about the need to replace this or that. Correct answer C-Brinelling is defined as indentations in the race caused by impact loads or vibrations. C. Both technicians What's up with that? Correct answer D-Both technicians are wrong because this is how power brakes are supposed to operate. The vacuum booster can be checked by pumping the pedal a few times while the engine is off. If your whole car shakes when your brakes are applied, it could be just your rear brakes. Question: I just had brakes and rotors done two months ago on my vehicle. Sketch each of your designs. I seem to remember a similar post where the cause was found to be the brake pedal not returning fully, but not noticed by the driver. Technician B says a defective wheel displays looseness or excessive play in the steering wheel especially while driving over rough road surfaces. 2023 The Arena Media Brands, LLC and respective content providers on this website. Correct answer D-Both of these techs are wrong. Brakes on an older vehicle with a quick take up valve in the master cylinder are being bled. Typically a seized caliper or pads will cause a burning smell, a pull to one side, and dragging at one wheel, but it is possible for it to stick without those, and effectively lessening your braking by nearly half (if it is a front wheel, which provide 75% of the braking). A pull when braking may also have nothing to do with brakes. b. VAV_\text{A}VA and I2I_2I2? Tech B Tech A says that the vacuum booster increases the vacuum in the brake system. Additionally, brake dragging can also be caused by frozen emergency brake cables as well as overextended self-adjusters. A power assist brake booster push rod that is to short will cause which of the following? ABS causing brakes to stick | TDIClub Forums Answer B, glazed . Excessive brake drag Hard Pedal: You may have a loss of power assist because the engine vacuum is low. To get a sense of the scale of the energy, if we were to use this energy to create electron-positron pairs, approximately how many pairs could we create? a. with the engine off If every time you apply your brakes, your brake pedal pulses up and down, the problem is usually caused by the rotors being warped or out of true. Technician A says to check for ABS or TCS (traction control system) diagnostic trouble codes. B. loosening the bleeder screw on the accumulator with the ignition switch on d. Neither A nor B, The front brake rotors and pads are being replaced on a vehicle equipped with a TCS (traction control system) and electronic stability control system (ESC). if your brake pedal is soft; first check the fluid level to determine if you have a leak in the braking system. initial cost On some vehicles, disc brakes are equipped with a steel scratcher that: Brake pad wear indicators may be either mechanical or: Which tool is used to measure the useful life of brake linings? B only 3 Mechanical Causes of Brake Drag - Radial Tire Service In Fig. a. a. a. Manage Settings You'll need to remove the caliper and inspect all moving parts to diagnose the problem. If you do either of these processes, and your brake pads are more than half worn, its worth it to just replace the pads at the same time for the peace of mind it will give you; pads wear out frequently (they are a consumable item) and you might as well deal with them while in the neighborhood. A vehicle comes in with a complaint of excessive pedal travel before the brakes apply. The wheel speed sensor is being diagnosed with an OEM diagnostic scan tool. You can pump the brakes before application to help offset this problem, but you need to get it fixed. Tech B says that the faster a vehicle moving, the more braking power is needed. If you have a soft or sinking brake pedal and are looking for information on what's causing it or what you should do next, you'll find the answers here. Fear of the unknown causes anxiety. To perform a thorough inspection of brake pads, you should do all of the following EXCEPT: Fundamentals of Engineering Economic Analysis, David Besanko, Mark Shanley, Scott Schaefer, Chapter 15 Test 3 Psych Testing and Measure. B only To determine if your rear brakes are the problem, you need to test them in isolation. Which of the following can cause brake system dragging? Answer: It sounds like you may have an ABS sensor not reading properly or maybe a damaged ABS sensor wire? Correct answer D-Both technicians are wrong. Much like our earlier examination of clutch issues, there are two general failure modes for brakes: They aren't engaging well enough, or they aren't disengaging. Technician A The rear brake linings are soaked with axle grease but still have a lot of lining left on them. Replacing sealed wheel bearing A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. What could be the cause of the problem? c. Both A and B d. while driving the vehicle slowly. Who is right? DOT 3 brake fluid should not boil until it gets above 400 degrees Fahrenheit, but old brake fluid that has absorbed water can boil at as little as 284 degrees, which is why it needs to be changed every other year. Who is correct? You have questions like: Will my brakes fail? ASE A4 Practice Test (Updated 2023) | Chapter 38 Test.docx - 5 / 5 When the brakes are applied, brake fluid is pumped from the master cylinder to the calipers in order to expand the caliper piston and slow the vehicle. My Car Sounds Like Something Is Dragging, But Nothing Mechanical fading is when the drum gets too hot and expands away from the linings. The fix for this brake problem is simple: resurfacing the rotors, if they are still thick enough (see section 3 above), or replacing them if they are not. If you dont find your issue here, check out my article on brake noises, look through the comments at the end, or leave a comment yourself telling your story. Technician A believes it's a defective proportioning valve issue. Are they safe? Technician A says the vacuum supply test involves inspecting the vacuum supply hose for kinks. Technician A A. All modern cars come with sophisticated antilock braking systems (ABS) and brake based stability control, which complicates some aspects of troubleshooting and repair, but those systems will inform you when there is a problem and default to the old, simple system. "Scratcher" and "sensor" are types of disc brake pad __________ indicators. Technician B Another possibility is that the pistons got bent, during a brake job or a car accident, and can't move freely anymore, causing the caliper to bind and limiting the amount of pressure to the pads. A brake hose problem like this can take two forms. In a similar vein, a pinched hard brake line, or a rubber line that has started to come apart internally can cause the same problem, though localized to one or two wheels. Wearing your pads down to the metal baking plates will also result in a very "wooden" brake pedal as well, as there is not as much friction when it is metal on metal, and they have to clamp harder to slow you down; the horrible grinding noise is usually an indication before the hard pedal. A worn or corroded master cylinder bore causes excess pedal effort resulting in dragging brakes.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'freeasestudyguides_com-medrectangle-4','ezslot_3',116,'0','0'])};__ez_fad_position('div-gpt-ad-freeasestudyguides_com-medrectangle-4-0'); Brake Lines and Hoses: There may be pressure trapped in the brake line or hose after the pedal has been released. Answer: There are a few options to look at here. C. Both Technicians Technician A says a parking brake not fully released could be the cause. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters. There are many possible causes of this shaking, including the front rotors being warped, hot spots (slight irregularities) on your rotors caused by excessive heat, or pad impressions. To further reduce noise, do not machine a disc brake rotor more than absolutely necessary.
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