BMW X5: Automatic Transmission

 Limp-Home Mode

If a fault is diagnosed in the system, such as e.g. failure of the high-pressure sensor, the fuel-supply control valve is de-energized; the fuel then flows via a so-called bypass into the rail. In the event of HPI limp-home mode, turbocharging is deactivated by an opening of the wastegate valves.

 Vacuum Supply All Models

Fig. 2: Identifying Air Brakes Vacuum Supply Models INTRODUCTION Vacuum is principally used for the brake booster. The vacuum in the inlet pipe depends on the varying engine load. Diesel engines do not normally have any vacuum in the inlet pipe. Vacuum on diesel engines is provided by a pump tha