E5 - Booster Leak Check

- Key ON.

- Run engine until vacuum pressure reaches 437-533 mm-Hg (18-21 in-Hg).

- Key OFF.

- Push down on the brake pedal and hold for a few seconds and release.

- Does the vacuum drop to 0 kPa (0 in-Hg)?

YES -- Replace or rebuild power brake booster as required.

NO -- System checks OK. Remove vacuum gauge and reconnect all vacuum lines.