Diagnostics Hummer

The engine control unit is a key component for the proper operation of the internal combustion engine. It manages combustion processes, ensures optimal performance, and maintains compliance with emission standards. The ECU responds to driver inputs and current operating conditions through numerous sensors and actuators.
Using diagnostics, it is possible to read and clear fault codes, monitor live data (e.g. fuel pressure, temperatures, engine speed), perform actuator tests (injectors, ignition coils, EGR), initiate diesel particulate filter regeneration, or carry out adaptations after component replacement.

This control unit manages the vehicle’s braking safety systems such as ABS, stability control (ESP), and hill-hold functions. It monitors the condition of individual wheels, braking system activity, and stability interventions during driving.
Diagnostics allow reading of fault codes, viewing sensor data (wheel speed, brake system pressure, pedal position), performing actuator tests, carrying out guided bleeding procedures, and other related functions.

The Body Control Module manages the vehicle’s comfort and auxiliary functions such as lighting, wipers, locking, turn signals, alarm, and remote control. It acts as a central hub for numerous sensors and switches.
Diagnostics allow configuration of functions (e.g. automatic wipers, coming/leaving home), testing of output signals (e.g. relay activation), reading sensor data, coding of new components, and real-time monitoring of input and output states.

This control unit is responsible for activating airbags and seatbelt pretensioners in the event of a collision. It monitors signals from crash sensors and determines when to deploy the protective systems.
Using diagnostics, it is possible to read the event memory (e.g. crash data), check individual circuits (resistance values, open circuits, short circuits), deactivate the passenger airbag, verify seatbelt pretensioner connections, and for certain types, clear crash data or register new components.

This unit manages the operation of automatic or automated transmissions. It determines when and how to shift, how to control the clutch, and the hydraulic system pressure. It responds to engine load, driving style, and driver inputs.
Diagnostics offer data reading (e.g. oil temperature, clutch status, pressure), shift adaptations, value resets after transmission replacement, testing of solenoid valves and sensors, and other functions.

The climate control unit ensures thermal comfort and regulates the vehicle’s interior environment. It controls the fan, directional flaps, compressor, and monitors temperature and humidity sensors.
Diagnostics allow testing of flap actuators, monitoring sensor status (e.g. evaporator temperature, outside temperature), reading refrigerant pressure, calibrating flap end positions, and evaluating compressor status or overall HVAC system performance.

The instrument cluster displays essential operational information such as speed, engine RPM, fuel level, fault messages, and service intervals. It is often connected to the vehicle’s central network and serves as the user interface.
Diagnostics allow testing of needles and displays, setting service intervals, configuring displayed information, coding after unit replacement, and reading faults related to the display or communication with other control units.

Each door may have a separate control unit that manages windows, locks, mirrors, lighting, and is linked to functions such as keyless entry or child lock.
Diagnostics allow testing of motor functions, button controls, lock feedback, reading the status of limit switches, and configuring comfort features (e.g. window auto-close when locking).

This unit manages multimedia, navigation, connectivity, and communication with the driver and passengers.
Diagnostics allow system reset or update, monitoring the status of connected devices (USB, Bluetooth), testing speakers and displays, checking for player or connectivity module faults, and modifying configurations according to vehicle equipment.

This unit provides connectivity between control units on different networks (CAN, LIN, FlexRay, etc.) and enables their mutual communication.
Diagnostics via the gateway allow access to other control units, monitoring of data flows, identification of overloaded or non-functional network branches, network configuration updates, coding of new units, and detection of communication faults.

This system manages and protects the high-voltage battery in electric and hybrid vehicles. It monitors state of charge, cell health, and system safety.
Diagnostics allow monitoring of individual cell voltages and temperatures, calculating battery life (SoH), controlling cooling and heating, tracking charge cycles, recording events, and performing control software adaptations.