Initial Inspection and Diagnostic Overview

When diagnosing front disc brakes:
1. Inspect the disc brake caliper and mounting for loose or damaged parts. Make sure the disc brake caliper and anchor bracket bolts are tightened to 98-132 Nm (72-124 ft lb).
2. Check the front brake hose and front disc brake caliper fitting for leaks or damage.
3. Check the disc brake caliper closely for wet areas that might indicate a leaking seal.
4. Measure front disc brake rotor thickness, parallelism and runout carefully. Refer to the procedure.
5. Resurface, recondition or replace the front disc brake rotor. A visual inspection will not determine the required service unless the damage is obvious.
6. Check for brake fluid contamination when inspecting the brake linings. This may indicate a leaking piston seal assembly. If a seal is leaking, the disc brake caliper must be disassembled and inspected.
7. Check for even wear from side-to-side. If the set of brake pads and linings on one side of the vehicle is excessively worn, the piston may be seized in the bore. If a seized piston is suspected, the disc brake caliper must be disassembled and inspected.