Lack Of Deceleration During Medium/Hard Braking Application

Possible causes include the following:

• Stuck shut inlet valve or leaky outlet valve (rear axle only). See TEST L  under DIAGNOSTIC TESTS.
• Hydraulic leak (soft pedal), air in brake system (soft pedal), little or no vacuum boost (hard pedal), stuck or inoperative wheel cylinder or caliper (hard pedal), pinched or crimped brake line or hose (hard pedal). Ineffective brake shoes or linings. Repair or replace mechanical parts as needed.