The transmission control unit (TCU) is a sophisticated electronic device that communicates with other systems in the vehicle, such as the engine control unit (ECU) or the ABS system. Based on signals from a number of devices, such as the accelerator pedal, speed sensors, oil temperature or engine load sensors, the TCU module makes decisions about gear changes. It is also responsible for adapting to the driver’s driving style, meaning that it can adjust its operation depending on the road conditions.

The ABS pump controller is a key component of the ABS (Anti-lock Braking System), which controls the operation of the braking system to prevent the wheels from locking up during braking. This ensures that the driver maintains control of the vehicle, even when braking sharply or on slippery surfaces. The ABS pump controller is responsible for analysing the data from the wheel speed sensors and decides when and how to modulate the brake system pressure to prevent loss of grip.

The engine controller, or ECU (Engine Control Unit), is one of the key components of modern vehicles. It is responsible for controlling the engine by collecting and processing data from various sensors. Based on this information, the ECU regulates the operation of the propulsion unit, optimising the air-fuel ratio, ignition and the operation of the assistance systems, such as ABS or traction control. In practice, the engine controller acts as the ‘brain’ of the entire powertrain without which modern vehicles could not function properly. However, like any other electronic device, the engine control unit can also fail. Problems with the ECU can lead to vehicle malfunctions or even immobilisation.

The gearbox controller, also known as the gearbox control unit, is a key component of an automatic transmission, responsible for controlling the process of shifting gears. It operates together with a number of sensors and monitors the driving conditions, speed, accelerator pedal position and many other parameters to ensure smooth and optimal transmission operation. Its task is to select the right gear depending on the road conditions, which directly affects driving comfort and fuel consumption.

The ABS pump control unit is a key component of the modern vehicle safety system which prevents the wheels from locking during braking. It consists of electronic controls and is an integral part of the braking system of any modern car. Repair of such a controller may be necessary in the event of damage that can lead to malfunctioning of the ABS system.

An engine controller is a key component of any modern vehicle, responsible for controlling and optimising engine performance. It is a type of computer that receives data from various sensors deployed in the car and controls various aspects of the engine's operation, such as the air/fuel ratio (AFR), ignition and emissions, based on this data. In today’s vehicles, the engine control unit is an indispensable component for optimum performance, fuel economy and emissions reduction.