If you're experiencing a leak and suspect there's a pump malfunctioning *related* to leak detection in a specific system (like a power steering fluid leak), you'd need to specify the system to get a more helpful answer. For example:
* Cooling System: The water pump is crucial, and a leak there would be catastrophic. It's located under the engine.
* Power Steering: The power steering pump is also under the engine. A leak here is less immediately catastrophic, but still needs attention.
* Brake System: A leak in the brake system is extremely dangerous. The master cylinder is a prime suspect.
* A/C System: Leaks in the A/C system use refrigerant, and while there isn't a "leak detection pump," a low refrigerant level might indicate a leak.
To find the source of your leak, you'll need to identify the leaking fluid (coolant, power steering fluid, brake fluid, oil, etc.) and then consult a repair manual or a mechanic to locate the potential source of the problem.