Circuit Description

The Throttle Actuator Control (TAC) module and PCM communicates via a dedicated serial data circuit. This serial data circuit is separate from any other serial data circuit on the vehicle. Accurate transmitting and receiving of serial data requires not only good circuit integrity but also adequate system voltage. This diagnostic monitors accuracy of serial data transmitted between TAC module and PCM. If the PCM detects a loss of data or invalid data, this DTC will set.