Method for monitoring a communication between a transmitting device and a receiving device, said transmitting device transmitting control frames to the receiving device, said method comprising the following steps: - transmission by the transmitting device of n control frames TC_i to the receiving device, i being an integer number ranging from 1 to n and defining the rank of each control frame, n being an integer number greater than or equal to 1, - determination of an instant of transmission of a diagnostic frame of rank 0 after the transmission of a control frame TC_i, said instant of transmission of said diagnostic frame being determined as follows: TD 0 _i = TC_i + Tdiag 0 _i - in which TD0_i corresponds to the instant of transmission of the diagnostic frame of rank 0 following the control frame TC_i and with: Tdiag 0 _i = Δt − Δtdiag - in which: • Δt corresponds to a predetermined minimum time between the transmission of two control frames, • Δtdiag corresponds to a time to be observed to guarantee a predefined reliability value concerning the state of the communication, and is expressed by the following relationship: Δtdiag = Δt Ln Fiab Ln 1 − τ fail - In which: - Fiab corresponds to the predefined reliability value, - τ fail corresponds to a rate of probability of occurrence of a communication failure between two control frames, said rate being revised according to whether the receiving device has received each control frame or not, - transmission by the transmitting device of said diagnostic frame at the determined transmission instant, to the receiving device, - determination from an increasing function of the instants of transmission of the following diagnostic frames TDx_i of rank x, - transmission of said diagnostic frames of rank x by the transmitting device to the receiving device. - transmission by the transmitting device of n control frames TC_i to the receiving device, i being an integer number ranging from 1 to n and defining the rank of each control frame, n being an integer number greater than or equal to 1, - determination of an instant of transmission of a diagnostic frame of rank 0 after the transmission of a control frame TC_i, said instant of transmission of said diagnostic frame being determined as follows: TD 0 _i = TC_i + Tdiag 0 _i - in which TD0_i corresponds to the instant of transmission of the diagnostic frame of rank 0 following the control frame TC_i and with: Tdiag 0 _i = Δt − Δtdiag - in which: • Δt corresponds to a predetermined minimum time between the transmission of two control frames, • Δtdiag corresponds to a time to be observed to guarantee a predefined reliability value concerning the state of the communication, and is expressed by the following relationship: Δtdiag = Δt Ln Fiab Ln 1 − τ fail - In which: - Fiab corresponds to the predefined reliability value, - τ fail corresponds to a rate of probability of occurrence of a communication failure between two control frames, said rate being revised according to whether the receiving device has received each control frame or not, - in which TD0_i corresponds to the instant of transmission of the diagnostic frame of rank 0 following the control frame TC_i and with: Tdiag 0 _i = Δt − Δtdiag - in which: • Δt corresponds to a predetermined minimum time between the transmission of two control frames, • Δtdiag corresponds to a time to be observed to guarantee a predefined reliability value concerning the state of the communication, and is expressed by the following relationship: Δtdiag = Δt Ln Fiab Ln 1 − τ fail • Δt corresponds to a predetermined minimum time between the transmission of two control frames, • Δtdiag corresponds to a time to be observed to guarantee a predefined reliability value concerning the state of the communication, and is expressed by the following relationship: Δtdiag = Δt Ln Fiab Ln 1 − τ fail - In which: - Fiab corresponds to the predefined reliability value, - τ fail corresponds to a rate of probability of occurrence of a communication failure between two control frames, said rate being revised according to whether the receiving device has received each control frame or not, - Fiab corresponds to the predefined reliability value, - τ fail corresponds to a rate of probability of occurrence of a communication failure between two control frames, said rate being revised according to whether the receiving device has received each control frame or not, - transmission by the transmitting device of said diagnostic frame at the determined transmission instant, to the receiving device, - determination from an increasing function of the instants of transmission of the following diagnostic frames TDx_i of rank x, - transmission of said diagnostic frames of rank x by the transmitting device to the receiving device.