Engine ventilation heating

The N14 engine has engine ventilation heating. The engine ventilation heating is at the entry to the fresh air pipe. Engine ventilation heating is an optional extra (optional extra 842 cold country version).

Fig 1: Identifying Engine Ventilation And Fresh Air Pipe

Courtesy of BMW OF NORTH AMERICA, INC.

At terminal 87 (terminal 15 On), the DME control module activates the engine ventilation heating via the engine ventilation heating relay. This supplies the engine ventilation heating with terminal 30. The engine ventilation heating relay is in the distribution box in the engine compartment.

Switch-on conditions:

• Terminal 15 ON
• Ambient temperature less than 2 °C
• Time after engine start less than 360 seconds

  (time is extended depending on engine oil temperature, coolant temperature as well as driving speed)