Automotive electrical diagnostics
1. General inspection
* Check the battery for corrosion, cracks and damaged cables.
* Inspect the alternator for wear, damage and belt tightness.
* Check the starter for damage, oil leaks and solenoid function.
* Check the condition of all electronic control units (ECUs) and connections.
2. Battery testing
* Check the battery voltage using a multimeter or battery tester.
* Start the engine and measure the voltage while the engine is running.
* Perform a load test on the battery to check its capacity.
3. Generator testing
* Check the generator voltage with the engine running.
*Measure the generator output current using an ammeter.
* Conduct a load test on the generator to check its power output.
4. Starter testing
* Check the voltage at the starter when starting the engine.
*Measure the current drawn by the starter using an ammeter.
* Perform a load test on the starter to check its torque.
5. Testing of electrical components
* Check resistance, continuity and grounding of all electrical components such as sensors, switches and relays.
* Check the voltage and current on electrical components using a multimeter.
* Perform computer diagnostics using a diagnostic scan tool to check trouble codes and system parameters.
6. Diagnosis of complex faults
* Check electrical wiring for breaks, shorts and corrosion.
* Use an oscilloscope to analyze electrical signals and identify faulty components.
*Refer to electrical diagrams and repair manuals for specific diagnostic information.
Tools required for automotive electrical diagnostics:
* Multimeter
* Battery tester
* Ammeter
* Oscilloscope
* Diagnostic scanner
* Electrical diagrams and repair manuals