L - Brake Noise

L1 CHECK FOR PEDAL NOISE
- Run engine at fast idle for 10 seconds or longer.
- Apply brake pedal and listen for noise.
- Compare results with known good system. Was a noise present?
YES - Go to L2.
NO - Vehicle OK.

L2 CHECK PUSH ROD ALIGNMENT
Check Power Brake Booster Push Rod alignent and travel. Is push rod OK?
YES - Bleed brake system.
NO - Replace power brake booster.