A system for testing synchronous TTP communication networks is provided. The system includes a first and second nodes coupled to a transmission bus. The first node is configured to generate a test command, which includes a test flag and a test round field, set the test flag, and transmit the test command and a plurality of parameters via the transmission bus using data frames. The second node is configured to receive the test command and the plurality of parameters from the transmission bus, determine whether the test flag is set, and compare parameter values in the received data frames with expected values in a test vector stored on the second node, for each of the plurality of parameters, in response to determining that the test flag is set. The first and second nodes are configured to communicate with each other using a TTP on a time slot basis.