A vehicle communication system includes a vehicle access module, a plurality of cables coupled to the vehicle access module, and an antenna coupled to the plurality of cables, wherein based upon short circuit analysis of the plurality of cables by the vehicle access module, the plurality of cables are decoupled from the vehicle access module. In order to determine with a short circuit exists in the plurality of cables, the short circuit analysis includes a determination as to whether a maximum of antenna current samples taken from the antenna is greater than a diagnostic parameter times an average of the antenna current samples.