Component description for the electric air pump - GF14.30-P-2000BK

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 113.967 in MODEL 219

ENGINE 113.964 in MODEL 164.1

ENGINE 113.971 in MODEL 251

Fig 1: Identifying Electric Air Pump

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The electrical air pump is located upstream of the intake manifold.

Task

Delivers air to the exhaust side of the engine.

Design

Electrically operated vane-type pump.

Function

During actuation, the voltage supply of the engine is performed via the air injection relay. The air pump (vane-type pump) is actuated for released air injection over the air pump relay parallel to the air pump switchover valve for a maximum of about 40 seconds. Its power consumption at 13 V is approx. 40 A. This draws the injected air from the air cleaner and drives this via the pressure connection via the air shutoff valves to the outlet ducts. If the air pump is running, for example due to incorrect actuation for longer than 4 minutes, it will be damaged.

Following actuation, air injection remains locked. A new enable of the air injection will only take place if the catalytic convertors cool down again due to a sufficiently long stoppage of the engine. The electrical air pump thus has sufficient time to cool down again.

Air injection may be actuated deliberately using STAR DIAGNOSIS for a maximum of 2 minutes. Prior to the next actuation, it is essential to maintain a cooling time of 30 minutes, otherwise the air pump may be damaged.