cardiagn.com 4. CHECK BRAKE PEDAL RESERVE DISTANCE (a) Remove the floor carpet. (b) Release the parking brake. (c) With the engine running, depress the pedal and measure the pedal reserve distance, as shown in the illustration. Standard pedal reserve distance at 490 N (50 kgf, 110.1 lbf): More than 116 mm (4.57 in.) If the reserve distance is not as specified, troubleshoot the brake system.