Q1 - Basic Check

- Key Off.

- Depress and release brake pedal several times to deplete all hydraulic pressure from the Hydro-Boost power brake booster.

- Depress and hold the brake pedal with light pressure.

- Key On, Engine Running.

- Does the brake pedal fall slightly and then hold, and is less pressure now required to hold the brake pedal at this position?

YES -- Hydro-Boost power brake booster is OK.

NO -- Go to Q2.