38S02W1 Brake Service Procedures Part 1

What can happen if the vehicle has a restricted disc brake caliper hose?

• Poor stopping power

• The vehicle pulls to one side with heavy braking

• Dragging brake

• Brake pedal pulsation

Brake rotors need to be refinished under all of these conditions except:

• Failure of lateral runout or thickness variation checks

• Slight scoring or heat spots

• Installation of new pads

• Noticeable brake pulsation

What could be the cause of paint removal and peeling on the power brake booster right below the master cylinder?

• A leaking secondary cup on the primary piston

• A leaking seal in the brake booster

• A leaking secondary cup on the secondary piston

• Fuel being drawn into the booster by a defective vacuum check valve

A vehicle with disc/drum brakes requires excessive brake pedal effort to stop. The brake pedal is firm when applied. While starting the engine with the brakes applied, the pedal does not go down slightly. Technician A says excessive brake pedal free play could be the cause. Technician B says air trapped in the hydraulic system could be the cause. Who is right?

• Technician A

• Technician B

• Both Technician A and B

• Neither Technician A nor B

Four wheel disc brakes on a vehicle are causing brake squeal. Technician A says it is a defective proportioning valve. Technician B says movement of the brake pads in the caliper are the cause. Who is correct?

• Technician A

• Technician B

• Both Technician A and B

• Neither Technician A nor B

What could cause a vehicle with four-wheel disc brakes to have a spongy brake pedal with longer than normal pedal travel?

• Air in the hydraulic system

• Caliper piston seized

• Parking brake out of adjustment

• A faulty power booster

What should you do before removing the master cylinder? (Select all that apply)

• Disconnect the brake lines

• Plug the ends of the brake lines to prevent fluid loss

• Purge the vacuum booster

• Drain the reservoir

The brake pedal feels spongy and low even after making sure all the adjustments are within specification. What is the most likely cause of this condition?

• A weak brake hose

• The brake pedal linkage is binding

• The compensator port is plugged

• The brake caliper is seized

What can cause a spongy brake pedal?

• ABS Diagnostic Trouble Code set

• Frozen caliper piston

• Defective metering valve

• Air in the hydraulic system

Which of the following will not lead to a low brake pedal condition?

• Loose wheel bearing

• Seized caliper piston

• Brake adjustment

• Low brake fluid