Diagnosis should include
- confirming that the vehicle performs the ABS self-test
- identifying the expected results of a test drive
- confirming that the brake pedal has the proper amount of resistance when pressed.
ASE 2: III. Brakes: I. Vehicle Dynamic Brake Systems (Air and Hydraulic): Antilock Brake System (ABS), Automatic Traction Control (ATC) System, and Electronic Stability Control (ESC) System, Automatic Emergency Braking (AEB) System (P-2)
Process/Skill Questions:
- What would cause a spongy, weak, or no-brake pedal?
- What might cause a hard brake pedal with little effort applied to the brakes?
- What do the brakes feel like when the ABS system engages?