With the engine running at idle and the shift lever in PARK
(P), depress the brake pedal and hold a constant foot pressure on the pedal.
If the pedal gradually falls away with the constant pressure, the hydraulic
system may be leaking. Check the following parts visually to confirm
a suspected leak:
| • | Master Cylinder Fluid Levels. While a slight drop in the level
occurs with normal lining wear, an abnormally low level, resulting in illumination
of the BRAKE warning lamp , may mean a leak in the system. The system
may be leaking internally or externally, refer to
Master Cylinder Test
. |
| • | Brake Hose and Pipe Connections. If leakage is found, verify torque
of fasteners and/or replace the hose or pipe. |
| • | Connecting Brake Components. Inspect for damage, and rebuild or
replace as needed. |
| • | Caliper. If leakage is found, rebuild or replace the assembly.
Also check the service brake pedal, brake adjustment and parking brake adjustment. |
