Car electrical diagnostics is the process of identifying faults in the electrical system of a car with a view to their subsequent elimination.
The vehicle’s electrical system includes:
* Battery
* Generator
* Starter
* Electronic control units (ECU)
* Sensors
*Wiring harnesses
* Lighting fixtures
* Heated side mirrors
* Stereo system
* Security systems, etc.
Purpose of car electrical diagnostics:
* Identify faulty components
* Determine the cause of the malfunction
* Fix the problem
* Make sure the entire electrical system is in good working order
Car electrical diagnostic procedure:
1. Collection of information:
* Questioning the vehicle owner about symptoms and history of the malfunction
* Visual inspection of electrical components
2. Checking power and grounding:
* Voltage measurement at power and ground connection points
* Checking the condition of contacts, wires and connectors
3. Diagnostics of ECU and sensors:
* Reading fault codes from the ECU using a diagnostic scanner
* Checking signals from sensors and actuators
4. Checking wiring integrity:
* Visual inspection of wiring harnesses and connectors
* Measuring resistance and insulation of wiring
5. Checking lighting fixtures and auxiliary equipment:
* Checking the functionality of lamps, fuses and relays
* Measurement of voltage and current consumption
6. Necessary tools and equipment:
* Diagnostic scanner
* Multimeter
* Test lamp
* Tool set
*Car wiring diagrams
Advantages of car electrical diagnostics:
* Accurate troubleshooting
* Increased vehicle safety and reliability
* Timely detection and prevention of more serious problems
* Saving time and money when repairing a car