K2

K2 CHECK FOR LEAKING DUMP VALVE

- Key "OFF."

Rubber Caps From EHCU:

- Remove the rubber caps from the two Electronic Hydraulic Control Unit (EHCU) low pressure accumulators (LPA) located on the rear of the unit.

LPA:

- Insert clean steel implement (e.g., paper clip) into each LPA.

- Have an assistant press hard on the brake pedal while observing the steel implements.

NOTE: A leaking dump valve is similar to the master cylinder bypass condition. It is important that the pedal be quickly and forcefully applied to rule out master cylinder bypass as a cause. Typically, master cylinder bypass occurs only at low pedal pressure rates and low tire pressures.

Do any of the implements move significantly?

> Yes
Replace the EHCU. Hydraulic Assembly

> No
Perform Pinpoint Test K3. K3