Car diagnostics by an electrician
Diagnostic stages:
1. Taking anamnesis:
– Question the driver about symptoms of the malfunction, past repairs and maintenance.
– Study the car’s service history.
2. Visual inspection:
– Check the battery and its terminals.
– Inspect wires, harnesses and connectors for damage, corrosion or poor connections.
– Check fuses and relays.
3. Using the diagnostic scanner:
– Connect the scanner to the vehicle’s on-board diagnostic connector (OBD-II).
– Read and decipher diagnostic trouble codes (DTCs).
– Check real-time data such as engine speed, coolant temperature, battery voltage.
4. Checking the charging system:
– Measure the voltage at the battery terminals with the engine running.
– Check the voltage on the generator.
– Check the operation of the voltage regulator.
5. Checking the starting system:
– Check the battery for voltage.
– Check the starter and starter relay.
– Check the condition of the spark plugs or glow plugs.
6. Lighting check:
– Check the operation of all headlights, lanterns and direction indicators.
– Check the condition of the lamps and wiring.
7. Checking other electrical systems:
– Check the operation of windows, mirrors, audio systems and other electrical appliances.
– Check the serviceability of sensors and actuators.
Tools used for diagnosis:
– Diagnostic scanner
– Multimeter
– Lamp tester
– Load forks
– Engine stethoscope
– Scanner for airbags (if necessary)
General tips:
– Start diagnostics with the most common faults.
– Use reliable tools and equipment.
– Refer to the manufacturer’s technical documentation for specific information about this vehicle.
– Do not hesitate to seek help from other specialists if necessary.