What are the causes of starting system failure?
2 Answers
Starting system failures can be caused by battery power supply system malfunctions, starting relay failures, or starter motor failures. Below are detailed explanations: Battery Power Supply System Malfunction: Such as insufficient battery charge, damaged vehicle power fuse or relay, loose starter cables or battery terminals, or oxidized terminals. Starting Relay Failure: Such as short circuit in the starting relay inductance coil, open circuit or grounding in the starting relay inductance coil, burnt contacts (moving or stationary) in the starting relay, or excessive gap between the relay core and contact arm. Starter Motor Failure: Such as issues with the starter DC motor, transmission mechanism problems, or control device malfunctions.
I've encountered starting system failures several times. The most common cause is a dead battery, often from leaving the car undriven too long or forgetting to turn off lights which drains power, resulting in no response when turning the key. Another major issue is a faulty starter motor, which makes strange noises when turning but fails to start. Ignition system failures can also cause this, such as carbon buildup on spark plugs or failed coils preventing fuel ignition. Battery performance drops significantly in cold weather, making problems more likely. Fuel supply interruption is another culprit - if the fuel pump fails, gasoline can't reach the engine. My advice: regularly check battery voltage and condition (typical lifespan is about three years), replacing it preemptively saves much trouble. Keep jumper cables or an emergency power pack in your car for quick assistance if needed. Develop the habit of starting the car monthly for short drives to maintain battery health.
