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Control Unit, engine management for your car

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  • VEMO
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The best-selling replacement parts from the Control Unit, engine management section. We have a large selection of spare parts from different brands for Control Unit, engine management and further low-price offers in our range of parts

Learn more about Control Unit, engine management - operation method, diagnosis, causes of faults and replacement intervals.

Electronic engine control units or controllers are devices that control the operation of the motor, receiving and processing information from various sensors. The main functions of the unit are the following:

  • controlling fuel supply to an injector-type engine;
  • monitoring operation of the ignition system;
  • maintaining correct temperature in the cooling system;
  • monitoring of exhaust gas recirculation.
Types of electronic engine control units
  • with plastic housing;
  • with metal housing.
Construction of electronic engine control units

The construction of the unit includes a housing. It contains a PCB, a storage device and a microprocessor. The housing also has connectors for the vehicle electrical network connection. The controllers are located under the hood of the vehicle or on the side of the front instrument panel, near the passenger seat, behind the glovebox.

The software of the unit has two modules — the functional one and the control one. The first one receives and processes the information from the sensors, and sends respective signals to the actuators. The second one checks incoming information from the sensor according to the specified parameters, and can block the engine operation if a fault is detected.

Tips on electronic engine control units operation

The estimated service life of controllers is stated in the technical documentation by the manufacturer of a particular vehicle. Perform timely diagnostics of the unit in accordance with the manufacturer recommendations.

Malfunctions of electronic engine control units
  • short circuit in the unit circuit;
  • mechanical damage of the component;
  • corrosion of the control unit components.
Signs of electronic engine control units malfunctions
  • engine operation failures;
  • engine stop;
  • difficult engine start;
  • absence of signals emitted by sensors;
  • fuses blowing.
Causes of electronic engine control units malfunctions
  • water ingress into the system;
  • errors during device repair or installation.
Replacement of electronic engine control units

It is not recommended to perform component repair. Without technical knowledge and experience, as well as without special tools, repair of the device is very difficult. If signs of a malfunction occur, it is recommended to contact a service center.

AutoDoc professional assistance

Wide range of high-quality spare parts for various vehicles brands and models is presented in our online-shop. We offer components with a warranty, and at reasonable prices. In the AutoDoc company, you can buy electronic engine control units that will work for a long time. We have fast delivery, regular promotions and discounts on all spare parts. If you have any questions during components choosing, our technical support service specialists will answer them.

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