1. A method for detecting a malfunction, including a possible insufficient or excessive supply of a micropump containing at least an inlet valve, an injection chamber with an internal pressure sensor and an exhaust valve, said method comprising determining the tightness of a pump by measuring pressure with said internal pressure sensor in said discharge sensor at least at certain intervals when the pump is inactive, and comparing with the control value. 2. The method according to claim 1, wherein said control value is obtained by measuring a pressure sensor in said pressure chamber for at least a portion of the pressure cycle when the pump is active. The method according to claim 2, further comprising determining the equivalent hydraulic resistance according to the following equation: 1 / R = 1 / R + 1 / R, where R is the equivalent hydraulic resistance, R is the residual hydraulic resistance of the specified intake valve in the closed state, R is the residual the hydraulic resistance of the specified exhaust valve in the closed state, and the specified equivalent hydraulic resistance is determined by measuring in-situ the specified internal pressure sensor pressure changes in the specified discharge chamber when the pump is active. 4. The method according to claim 3, further comprising measuring the pressure at the inlet and outlet of the pump when the pump is active, while the indicated possible insufficient or excessive flow is then characterized by the maximum leakage rate Q, determined according to the following ratio: Q = ΔP / 4R, where ΔР is the difference between the specified d1. Способ детектирования неисправности, в том числе возможной недостаточной или избыточной подачи микронасоса, содержащего по меньшей мере впускной клапан, нагнетательную камеру с внутренним датчиком давления и выпускной клапан, причем указанный способ содержит определение герметичности насоса путем измерения давления указанным внутренним датчиком давления в указанной нагнетательной к
