Flow of Diagnosis

^ Brake pulsation (brake roughness) that is present during brake application is caused by;
- foreign material build-up
- contamination on the rotor surface
- uneven lateral runout.
^ For diagnostic procedures, refer to Brakes - System Diagnosis. Testing and Inspection
^ Each time the brakes are serviced, the front and rear disc brake rotors should be checked for scoring, runout, parallelism and thickness.
- Front and rear disc brake rotor scoring and runout may be checked with the front and rear disc brake rotors either on or off the vehicle.
- To check parallelism and thickness, the front or rear disc brake caliper must be removed.
^ Disc brake rotor specifications are listed in Specifications.
^ If there is foreign material build-up found on disc brake rotor or brake shoe and lining surfaces, hand sand front disc brake rotor and brake shoe and lining.

PROCEDURES
Refer to Brakes - System Diagnosis. Testing and Inspection
Refer to Testing and Inspection - Procedures for rotor runout/parallelism/thickness tests.