A panel mount cable control assembly is provided which is useful with a vehicle having controllable mechanisms such as a throttle and choke of an internal combustion engine. A negative edge counter starts counting, starting with an initial value, upon receiving a negative edge of the dimming pulse signal. Reduction in edge thickness swelling has been achieved. The first determination step determines whether the number of the data points exceeds the minimum threshold value. Therefore, the malfunction of the pressure sensor or any abnormal conditions included in the outputs from the pressure sensor can be detected even during the engine operation. The digital certificate can also be stored as a separate file associated with the electronic document, as a separate signed digital certificate and as a database record.