Possible causes of electrical problems that prevent the car from starting:
1. Defective battery
*Check the battery voltage and make sure it is at least 12.6V.
* Clean the battery terminals and tighten them.
2. Faulty starter
* Check starter contacts and wires.
*Try tapping the starter with a hammer to loosen stuck components.
3. Problems with the ignition system
* Check the spark plugs and replace them if they are worn out.
* Make sure the ignition distributor or coil is working properly.
4. Wiring problems
* Inspect the wiring for signs of corrosion or damage.
* Check fuses and relays and replace blown ones.
5. Faulty crankshaft or camshaft sensor
* These sensors transmit signals to the engine control module (ECM), which uses them to synchronize ignition and fuel injection.
*Check these sensors using a diagnostic scanner.
6. Faulty ECM
* The ECM controls all of the vehicle’s electrical systems.
*If the ECM is faulty, it can cause starting problems and other electrical problems.
7. Problems with the immobilizer
* The immobilizer system is designed to prevent unauthorized starting of the vehicle.
* If the immobilizer is faulty, it may prevent the engine from starting.
Diagnostics and troubleshooting:
1. Check the battery and starter.
2. Inspect the ignition system.
3. Check wiring.
4. Use a diagnostic scanner to check the sensors and ECM.
5. If the problem persists, contact a qualified mechanic for assistance.