DT4.3 RABS Hydraulic Valve Leak Test

^ Press hard on the brake pedal and keep pressure on the brake pedal for 30 seconds.

^ While keeping pressure on the brake pedal, monitor the height of the brake pedal.

NOTE: The condition is similar to the Master Cylinder Bypass condition. It is important that the brake pedal be quickly and forcefully applied to rule out Master Cylinder Bypass as the cause if a hydraulic leak is detected. Typically, Master Cylinder Bypass only occurs at low line pressures.

^ Does the brake pedal drop slowly toward the floor?

YES -- Replace anti-lock brake control module. Go to Drive Test Code 16 to verify concern is resolved. Description

NO -- return to 4.11. 4.11