Hard or Soft Brake Pedal

POSSIBLE SOURCE(S):
- Stuck shut isolation valve (hard).

ACTION TO TAKE:
- Refer to Pinpoint Test H, step H14 only. H14 Blocked Isolation Orifice

POSSIBLE SOURCE(S):
- Leaky dump valve (soft).

ACTION TO TAKE:
- Refer to Pinpoint Test H, step H13 only. H13 Obtain DTC

POSSIBLE SOURCE(S):
- Leaky isolation valve during RABS stop (soft).

ACTION TO TAKE:
- Refer to Pinpoint Test J, step J9 only.

POSSIBLE SOURCE(S):
- Stoplight switch always on while driving.

ACTION TO TAKE:
- Refer to Pinpoint Test Q, steps Q1-Q4 only. Q1 Check Yellow RABS Warning Lamp

POSSIBLE SOURCE(S):
- Hydraulic leak in rear brake tube or rear brake hose, fitting, brake master cylinder, rear wheel cylinder, or front disc brake caliper.

ACTION TO TAKE:
- Check brake hydraulic system for leaks and repair as necessary.

POSSIBLE SOURCE(S):
- Air in brake system.

ACTION TO TAKE:
- Bleed brakes. Brake Bleeding

POSSIBLE SOURCE(S):
- Brake related concern:
- Little or no vacuum boost.
- Stuck or inoperative rear wheel cylinder or front disc brake caliper.
- Pinched or crimped rear brake tube or rear brake hose.

ACTION TO TAKE:
- Check brake hydraulic system.