What Causes a Car That Won't Lock or Start?

[DeLondon]

The reasons why a car won't lock or start include insufficient battery power, damaged remote key, malfunctioning vehicle components, or external interference. Here are relevant introductions about ignition: Traditional Ignition: The working process of mechanical ignition systems involves the crankshaft driving the distributor shaft to rotate. The cam on the distributor shaft turns, causing the primary contacts of the ignition coil to connect and disconnect, thereby generating high voltage. This ignition high voltage is distributed to each cylinder's spark plug in sequence through the distributor rotor according to engine requirements, where the spark plug generates sparks to ignite the gas in the combustion chamber. Electronic Ignition: Electronic ignition systems are completely different from mechanical ignition systems. They include an electronic control device for ignition, which contains ignition control curve maps (MAP maps) required for various engine operating conditions. A series of sensors such as engine speed sensors, intake manifold vacuum sensors (engine load sensors), throttle position sensors, and crankshaft position sensors are used to determine the engine's operating state.