Automotive Technology/Brakes
This material will cover the ASE A5 test.
This is just an outline for the material
Federal Motor Vehicle Safety Standards (FMVSS) 135 assures the performance but not the design of passenger vehicle brake system.
Hydraulic System Diagnosis and Repair[edit | edit source]
see Brake Hydraulic System Diagnosis and Repair
Master Cylinder[edit | edit source]
(3 Questions)
- Diagnose Problems with Master Cylinder
- Poor Stopping
- Dragging
- High or Low Pedal
- Hard Pedal
- Spongy Pedal
- Leakage
- Determine proper response of master cylinder
- Remove, Repair, Replace
- Bench bleed a Master Cylinder
- Measure and adjust Master Cylinder push-rod length
Lines and Hoses[edit | edit source]
(3 Questions)
- Diagnose
- Poor stopping
- Pulling
- Leaks and Clogs
- Remove and Replace
Valves and Switches[edit | edit source]
(3 Questions)
- Diagnose
- Remove and Replace
Bleeding, Flushing, and Leak Testing[edit | edit source]
(3 Questions)
- Diagnose problems in the Brake fluid
- Sponginess
- Dragging
- Poor stopping
- Incorrect Pedal travel
- Select, handle store and install proper brake fluids
- Bleed and/or flush hydraulic system
- Manual
- Pressure
- Vacuum
- surge gravity
Drum Brake Diagnosis and Repair[edit | edit source]
see Drum Brake Diagnosis and Repair
- Diagnose
- Hydraulic
- Mechanical
- Inspect Drums
- Machine Drums
- Parts
- Brake shoes/linings
- Wheel cylinder
- Parking Brake
- Self-adjusters
- Springs, Pins, Levers, Clips
Drum Brake Diagnosis and Repair[edit | edit source]
see Drum Brake Diagnosis and Repair
- Diagnose
- Hydraulic
- Mechanical
- Inspect Drums
- Machine Drums
- Parts
- Brake shoes/linings
- Wheel cylinder
- Parking Brake
- Self-adjusters
- Springs, Pins, Levers, Clips
Power Assist Units Diagnosis and Repair[edit | edit source]
see Power Assist Units Diagnosis and Repair
- Diagnose with and without engine running
- Inspect
Vacuum Power Booster[edit | edit source]
Hydro-boost System and Accumulator[edit | edit source]
Miscellaneous Systems Diagnosis and Repair[edit | edit source]
see Brake Systems Diagnosis and Repair
Pedal Linkage[edit | edit source]
- Binding, looseness, adjustment
Wheel Bearings[edit | edit source]
- Wheel shimmy, vibration, noise
- R&R Wheel Bearing
Parking Brakes[edit | edit source]
- Adjust Parking brake
- switch, wiring, brake indicator
Electrical[edit | edit source]
- Brake switch, lamps, circuits
Electronic Brake Control Systems Diagnosis and Repair[edit | edit source]
see Electronic Brake Control Systems Diagnosis and Repair
- Diagnose
- Poor stopping, Wheel lock-up, false activation, noise
- Pedal feel and travel, pulsation
Anti-lock Brake System (ABS)[edit | edit source]
Traction Control System (TCS)[edit | edit source]
Electronic Stability Control System (ESC)[edit | edit source]
- Observe electronic brake control system indicator light(s) at startup and during road test; determine if further diagnosis is needed.
- Diagnose electronic brake control system, electronic control(s), components, and
circuits using on-board diagnosis and/or recommended test equipment; determine needed repairs.
- Bleed and/or flush the electronic brake control hydraulic system following
manufacturers’ procedures.
- Remove and install electronic brake control system components following
manufacturers’ procedures and specifications; observe proper placement of components and routing of wiring harness.
- Test, diagnose and service electronic brake control system sensors (such as
speed, yaw, steering angle, brake pedal position, etc.) and circuits following manufacturers’ recommended procedures (includes output signal, resistance, shorts to voltage/ground, and frequency data.).
- Diagnose electronic brake control system braking concerns caused by vehicle modifications
- (wheel/tire size, curb height, final drive ratio, etc.)
- and other vehicle mechanical and electrical/electronic modifications
- (communication, security, and radio, etc.).
- Repair wiring harness and connectors following manufacturers’ procedures.