Question

15 20 points

Read the scenario below and answer the questions that follow
You are tasked with diagnosing a customer's vehicle that has been experiencing braking issues. The customer reports hearing a squeaking noise when applying the
brakes and a soft brake pedal. The vehicle is equipped with disc brakes on the front and drum brakes on the rear.
1. Based on the customer's description, list two potential causes of the squeaking noise during braking (5 points)
2. Identify one possible reason for the soft brake pedal and suggest a diagnostic step to confirm your hypothesis. (5 points)
3. Outline a general procedure for inspecting and servicing both front and rear brakes on this vehicle. (10 points)
4

Answer 1

1) Two potential causes of the squeaking noise during braking could be worn or contaminated brake pads.

2) Air in the brake system could be a possible reason for a soft brake pedal.

3) The general procedure for inspecting and servicing both front and rear brakes includes checking components, replacing worn parts, and testing the brakes.

Step-by-step explanation:

1. The two potential causes of the squeaking noise during braking could be worn brake pads or contaminated brake pads. Worn brake pads can cause metal-to-metal contact, resulting in a squeaking noise. Contaminated brake pads, such as those contaminated with oil or grease, can also cause noise when applied.

2. One possible reason for the soft brake pedal could be air in the brake system. Air can enter the brake system through a leak, causing a spongy or soft brake pedal. To confirm the hypothesis, perform a brake bleeding procedure to remove any air from the system.

3. The general procedure for inspecting and servicing both front and rear brakes on this vehicle would include:

1. Secure the vehicle on a level surface and set the parking brake.
2. Remove the wheels to access the brake components.
3. Inspect the disc brake pads for wear, thickness, and signs of damage. Replace if necessary.
4. Inspect the drum brake shoes for wear, thickness, and signs of damage. Replace if necessary.
5. Check the brake rotors and drums for any signs of damage or uneven wear. Resurface or replace if necessary.
6. Inspect the brake calipers and wheel cylinders for any leaks, damage, or sticking. Replace or rebuild if necessary.
7. Check the brake fluid level and condition. If necessary, flush and replace the brake fluid.
8. Reassemble the brakes, ensuring all components are properly installed and torqued to specification.
9. Bleed the brake system to remove any air if necessary.
10. Finally, test the vehicle's brakes to ensure proper operation and no abnormalities.