Electrical Repair

Our main difference from our competitors is our vast experience in working with electrics and vehicle control units.

Types of Vehicle Control Units and Their Common Problems

Modern vehicles are equipped with numerous electronic control units (ECUs) responsible for managing everything from the engine to comfort systems. These modules play a crucial role in ensuring safety, performance, and convenience.

Main Types of Control Units:

1. Engine Control Unit (ECU/PCM)

Manages engine functions such as fuel injection, ignition timing, variable valve timing, and exhaust gas recirculation.

Common issues: software failures, moisture damage, overheating, faulty internal components, sensor errors.

2. Transmission Control Module (TCM)

Controls gear shifting, hydraulic systems, and clutch operation in automatic or robotic transmissions.

Common issues: calibration errors, overheating, worn contacts, communication faults with the ECU.

3. ABS/ESP Modules

Control the anti-lock braking system and vehicle stability system.

Common issues: sensor signal loss, damaged circuit boards, corroded connectors, CAN-bus errors.

4. Airbag Control Unit (SRS/Airbag Module)

Detects collisions and triggers airbag deployment.

Common issues: post-collision errors, power supply failure, internal short circuits, software malfunctions.

5. Body Control Modules (BCM, GEM, UCH, etc.)

Handle functions like lighting, power windows, alarm system, central locking, and other comfort features.

Common issues: power overloads, water damage, firmware corruption, network communication failures.

6. HVAC Control Unit

Manages heating, ventilation, and air conditioning.

Common issues: faulty sensors, broken actuators, compressor control errors.

Why Do Control Units Fail?

Moisture and corrosion. Water intrusion is one of the most common causes of ECU failure.
Voltage spikes. Sudden surges from a faulty alternator or during engine startup can damage components.
Physical damage. Especially common for modules located in the engine bay or under seats.
Improper repair or modification. Incorrect programming or installation of aftermarket devices can disrupt system operation.

ECU and Auto Electrical Repairs with Over 25 Years of Experience!

For over 25 years, we’ve specialized in the repair of automotive electronic systems and earned a reputation as a trusted expert in auto electrical work. Our core expertise lies in diagnosing, restoring, and repairing engine control units (ECUs), as well as solving complex issues related to vehicle electrical systems.

We use original dealer-grade diagnostic equipment from all major automotive brands, allowing us to accurately identify problems and carry out precise repairs — even on the latest vehicle models.

Our key services include:

Professional repair of engine control units (ECU);
Fault detection and repair of wiring and CAN-bus systems;
Diagnostics, reprogramming, and adaptation of electronic modules;
Restoration after short circuits, water damage, or voltage surges;
Recover data from damaged control units.
Electrical systems for comfort: power windows, alarms, central locking, and more.

We have modern diagnostic equipment at our disposal.

Devices for control, information extraction and soldering.

Equipment for cloning keys and control units.

Types of Automotive Control Unit Repairs

Repairing vehicle electronic control units (ECUs and other modules) involves a range of technical and software-based procedures aimed at restoring full functionality without replacing the module.

Depending on the nature of the issue, ECU repairs can be divided into several main categories:

1. Diagnostics and Fault Code Reset

Computer diagnostics using dealer-grade tools;
Reading and interpreting diagnostic trouble codes (DTCs);
Clearing fault codes after repairs or part replacements;
Checking communication lines and power circuits.

When used: if warning lights appear, systems behave erratically, or software issues are suspected.

2. Software Repair (Reprogramming)

Restoring or updating the original firmware;
Reprogramming the ECU to work with replaced components (e.g. engine, transmission);
Disabling or enabling specific functions (e.g. EGR, VVT, AdBlue);
Fixing malfunctions after incorrect software modifications.

When used: for software glitches, firmware incompatibility, or missing functions.

3. Adaptation and Initialization

Binding a control unit to a specific vehicle;
Resetting adaptations after repairs or part replacement;
Synchronizing with other systems (immobilizer, keys, sensors, etc.).

When used: after replacing a control unit, engine, or transmission.

4. Hardware Repair (Component-Level Repair)

Restoring damaged PCB tracks and connectors;
Replacing faulty microchips, controllers, resistors, capacitors;
Repairing water-damaged or overheated modules;
Re-soldering or reinforcing components that have detached due to vibration or aging.

When used: for physical damage, burnt parts, or power supply issues.

5. Component Replacement

Installing equivalent or OEM-grade parts;
Replacing processors, EEPROMs, injector/ignition drivers;
Restoring burned or damaged microchips after electrical surges.

When used: if the ECU is unresponsive, fails to activate actuators, or was damaged in an accident or by water.

6. Cloning and Module Replacement

Reading and transferring data from a faulty unit to a new or used one;
Selecting a compatible replacement;
Copying identifiers, firmware, immobilizer codes, and configuration data.

When used: when the original ECU is beyond repair but data can still be recovered.

7. Bench Testing

Simulating vehicle conditions to test the ECU’s behavior;
Measuring output signals and responses to commands;
Detecting overheating, instability, or voltage drops.

When used: to identify intermittent or hidden faults.

We Solve These Issues Professionally At our auto service center, we have over 25 years of hands-on experience. We use dealer-grade diagnostic tools to accurately identify problems and perform high-quality repairs on all types of control units — regardless of the vehicle make. If warning lights appear on your dashboard or your car behaves unusually, don’t wait. Early diagnostics can save the module from costly replacement.