Mercedes-Benz Secondary Air Injection System Malfunction
1 Answers
Secondary air injection malfunction. The user needs to replace the air injection driver and air pump to resolve the issue. This occurs because the power terminals of the air pump are all energized, and the internal breakdown of the air injection driver causes the motor power line to remain continuously connected to the 50A fuse, leading to motor burnout due to prolonged operation. The secondary air injection system consists of an air pump, air injection control valve, air injection driver, and connecting pipes. The engine control unit controls the operation of the air pump and air injection control valve through the air injection driver, while the air injection driver feeds back the working status of the secondary air injection system to the engine control unit.