This course covers principles of operation and types, diagnosis, service, and repair of brake systems. Topics include drum and disc brakes involving hydraulic, vacuum boost, hydra-boost, electrically powered boost, and anti-lock and parking brake systems. Upon completion, students should be able to diagnose, service, and repair various automotive braking systems.

Prerequisites: TRN 110, TRN 120, DRE 097 or appropriate placement test score.

Corequisites: AUT 151A

Class Hours: 2        Lab Hours: 3        Clinical/Work Exp.: 0        Credit Hours: 3


General Brake Systems Diagnosis

  • Complete work order to include customer information, vehicle identifying information, customer concern, related service history, cause, and correction.

  • Identify and interpret brake system concern; determine necessary action.

  • Research applicable vehicle and service information, such as brake system operation, vehicle service history, service precautions, and technical service bulletins.

  • Locate and interpret vehicle and major component identification numbers.

Hydraulic System Diagnosis and Repair

  • Diagnose pressure concerns in the brake system using hydraulic principles (Pascalís Law).

  • Measure brake pedal height, travel, and free play (as applicable); determine necessary action.

  • Check master cylinder for internal/external leaks and proper operation; determine necessary action.

  • Remove, bench bleed, and reinstall master cylinder.

  • Diagnose poor stopping, pulling or dragging concerns caused by malfunctions in the hydraulic system; determine necessary action.

  • Inspect brake lines, flexible hoses, and fittings for leaks, dents, kinks, rust, cracks, bulging or wear; tighten loose fittings and supports; determine necessary action.

  • Replace brake lines, hoses, fittings, and supports.

  • Fabricate brake lines using proper material and flaring procedures (double flare and ISO types).

  • Select, handle, store, and fill brake fluids to proper levels.

  • Inspect, test, and/or replace metering (hold-off), proportioning (balance), pressure differential, and combination valves.

  • Inspect, test, and/or replace components of brake warning light system.

  • Bleed and/or flush brake system.

Drum Brake Diagnosis and Repair

  • Diagnose poor stopping, noise, vibration, pulling, grabbing, dragging or pedal pulsation concerns; determine necessary action.

  • Remove, clean, inspect, and measure brake drums; determine necessary action.

  • Refinish brake drum; measure final drum diameter.

  • Remove clean, and inspect brake shoes, springs, pins, clips, levers, adjusters/self-adjusters, other related brake hardware, and backing support plates: lubricate and reassemble.

  • Inspect and install wheel cylinders.

  • Pre-adjust brake shoes and parking brake; install brake drums or drum/hub assemblies and wheel bearings.

  • Install wheel, torque lug nuts, and make final checks and adjustments.

Disc Brake Diagnosis and Repair

  • Diagnose poor stopping, noise, vibration, pulling, grabbing, dragging or pulsation concerns; determine necessary action.

  • Remove caliper assembly; inspect for leaks and damage to caliper housing; determine necessary action.

  • Clean and inspect caliper mounting and slides/pins for operation, wear, and damage; determine necessary action.

  • Remove, inspect and replace pads and retaining hardware; determine necessary action.

  • Disassemble and clean caliper assembly; inspect parts for wear, rust, scoring, and damage; replace seal, boot, and damaged or worn parts.

  • Reassemble, lubricate, and reinstall caliper, pads, and related hardware; seat pads, and inspect for leaks.

  • Clean, inspect, and measure rotor thickness, lateral runout, and thickness variation; determine necessary action.

  • Remove and reinstall rotor.

  • Refinish rotor on vehicle; measure final rotor thickness.

  • Refinish rotor off vehicle; measure final rotor thickness.

  • Install wheel, torque lug nuts, and make final checks and adjustments.

Power Assist Units Diagnosis and Repair

  • Test pedal free travel; check power assist operation.

  • Check vacuum supply to vacuum-type power booster.

  • Inspect the vacuum-type power booster unit for leaks; inspect the check valve for proper operation; determine necessary action.

Miscellaneous (Wheel Bearings, Parking Brakes, Electrical, Etc.) Diagnosis and Repair

  • Diagnose wheel bearing noises, wheel shimmy, and vibration concerns; determine necessary action.

  • Remove, clean, inspect, repack, and install wheel bearings and replace seals; install hub and adjust bearings.

  • Check parking brake cables and components for wear, binding, and corrosion; clean, lubricate, adjust or replace as needed.

  • Check parking brake and indicator light system operation; determine necessary action.

  • Check operation of brake stop light system; determine necessary action.

  • Replace wheel bearing and race.

  • Inspect and replace wheel studs.

  • Remove and reinstall sealed wheel bearing assembly.

Electronic Brake, Traction and Stability Control Systems Diagnosis and Repair.

  • Identify and inspect electronic brake control system components; determine necessary action.

  • Diagnose poor stopping, wheel lock-up, abnormal pedal feel, unwanted application, and noise concerns associated with the electronic brake control system; determine necessary action.

  • Diagnose electronic brake control system electronic control(s) and components by retrieving diagnostic trouble codes, and/or using recommended test equipment; determine necessary action.

  • Depressurize high-pressure components of the electronic brake control system.

  • Bleed the electronic brake control system hydraulic circuits.

  • Remove and install electronic brake control system electrical brake control system.

  • Test, diagnose, and service electronic brake control system speed sensors (digital and analog), toothed ring(tone wheel), and circuits using a graphing multimeter (GMM)/digital storage oscilloscope (DSO) (includes output signal, resistance, shorts to voltage/ground, and frequency data).

  • Diagnose electronic brake control system braking concerns caused by vehicle modifications (tire size, curb height, final drive ratio, etc.).


A Excellent 4 Grade Points Numerical grade of 90 - 100
B Above Average 3 Grade Points Numerical grade of 80 - 89
C Average 2 Grade Points Numerical grade of 70 - 79
D Below Average 1 Grade Point Numerical grade of 60 - 69
F Failed 0 Grade Point Numerical below 60
WP Withdraw Passing 0 Grade Point Issued if the course is dropped after the
census date and on or before the 50% point
of the course unless the instructor issues
a WF based on extenuating circumstances
WF Withdraw Failing 0 Grade Point Issued if the course is dropped after the
50% point of the course or the instructor
chooses based on extenuating circumstances


Regular, prompt attendance is essential for academic success. Students should strive for perfect attendance. It is recognized, however, that students may be absent from class occasionally. Students should reference the instructor's syllabus to determine the attendance requirement for this course. The instructor is responsible for enforcing the attendance requirement. It is the student's responsibility to withdraw from the course. Students may complete the withdrawal process in the Advising Center. Students may receive a grade of WP if they withdraw from a course by the 50% point/date of the course. Any student withdrawals that occur after the 50% point will result in a grade of WF. Exceptions to the "WF" grade may exist if the student has a mitigating circumstance. Students are encouraged to discuss withdrawal options with the faculty member and complete the withdrawal process in the Advising Center. Students who come in after the scheduled starting time or students who leave before the scheduled ending time will be counted as tardy. Students should reference the instructor's syllabus to determine the tardy requirement for this course. The instructor is responsible for enforcing the tardy requirement.


To preserve the best learning environment for all students, all cell phones and other electronic devices must be turned off and stored with other personal property in book bags while class is in session. Ear buds must be removed. If a student uses these devices during class, the instructor will require the student to leave because text messaging and other activities disturb the class and prevent others from concentrating on class work. If a student uses electronic devices during a test or quiz, a zero will be recorded for that assignment, and the instructor may withdraw the student from the course. The use of a phone in any way during a test or the discussion of a graded test is strictly prohibited and considered cheating.


If you have a documented disability and wish to discuss academic accommodations, please contact Frank Pait, Counselor for Students with Disabilities, at extension 4222, in the Learning Assistance Center (LAC) located on the first floor of the Cuyler A. Dunbar Building (CAD).

If you are a student with a mobility impairment and have a class in a multi-story building, please discuss evacuation plans with your instructor.


Students shall be permitted excused absences from all classes two days per academic year for religious observances required by their faith. The absences requested in accordance with this policy are "one of" and not "in addition to" any absences otherwise permitted by the faculty for a class. The excused absence request must be submitted by the second class meeting and a minimum of two (2) weeks in advance of the absence. Please contact your instructor for the required forms.


Students at CVCC are expected to be honest in all academic pursuits, whether class, lab, shop, or clinical. Acts of academic dishonesty are considered unethical and subject to behavior sanctions. Examples of academic dishonesty include, but are not limited to the following:

1. Sharing information about the content of quizzes, exams, classroom/lab/shop/clinical assignments (scheduled or make-up) without approval of the instructor including but not limited to unauthorized copying, collaboration, or use of notes, books, or other materials when preparing for or completing examinations or other academic assignments (scheduled or make-up).

2. Buying, selling, or otherwise obtaining a copy of a quiz, exams, project, term paper, or like document, without approval of the instructor.

3. Plagiarism, which is defined as the intentional representation of another person's work, words, thoughts, or ideas (from any source) as one's own.

4. Failing to follow approved test taking procedures by performing such acts as:
  • Looking on another student's test
  • Use of unauthorized notes; written, electronic, or otherwise
  • Changing answers after exam is scored
  • Verbal, non-verbal, or electronic communication with another student during an exam

Instructors have the authority to impose either a warning, probation, or dismissal from the class for acts of academic dishonesty relative to classes under their supervision.

Students have an obligation to report any acts of academic dishonesty to the instructor or appropriate campus authority when reasonable grounds exist for such a report. Students also have a responsibility to cooperate in the investigation of any alleged acts of academic dishonesty. Failure to report acts of academic dishonesty could result in a behavior sanction as outlined in the Student Conduct Policy, Policy 3.18


To Report a Serious Emergency Dial 911 from any campus phone or 911 from mobile phones; then dial 711 (Campus Safety & Security) from a campus phone.

For specific CVCC emergencies guidelines, please refer to the CVCC Emergency Guidebook


Quickly get all persons behind a locked door, close blinds, lock all windows/doors, and turn off lights. Sit against an interior wall away from windows and doors (hide). Keep cell phones ON in silent mode or vibrate. Do not leave the locked area until notified by a known CVCC administrator or by law enforcement that the emergency is over.

Seek Shelter (tornados, hurricanes, etc.)
Move to hallways and/or other inner rooms. Stay away from windows and doors. Sit on floor facing the inner wall and shield head with hands. Remain in shelter until notified by CVCC administration or by emergency personnel that the danger is over.

Building Evacuation
Leave the building immediately and proceed to a parking lot location at least 300 feet from the building. Do not delay to retrieve books or other personal items. Do not use elevators. Do not touch suspicious objects. Stay clear of the building once outside. Faculty should take class rosters if possible and account for all students at evacuation locations. Report any special assistance needed to CVCC faculty/staff or to emergency personnel. If you are aware or suspect someone is trapped in a threatened building, notify CVCC faculty/staff or emergency personnel. Remain at your building evacuation location until further instructions are provided by CVCC administration or by emergency personnel. In case of bomb threat, avoid using cell phones and wireless devices; this may detonate the bomb.

Smoke, Fire or Hazardous Materials
Activate the nearest fire alarm. Before attempting to fight a fire, notify someone nearby. Never attempt to fight a fire larger than wastebasket size. Close doors and windows to isolate the problem if the situation permits. If trapped in a building during a fire, use wet towels or cloths to protect you from flames and smoke. Stop/drop/roll if your clothes catch on fire. Do not open doors that feel hot. Always stay between the fire and an exit. Stay low to the floor as you try to exit.

Personal Emergencies
Unless you feel threatened, stay with the victim until emergency personnel arrive. Avoid contact with bodily fluids. Stay calm and try to minimize panic. If the person is conscious, ask if he/she is a High School student (if so, include this information in your 911 call).

Emergency Procedures Revised: April 4, 2012

Cell phone backup to 711 Campus Safety & Security:

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