Corvette V8-5.7L VIN G (1997)
Electronic Throttle Control Module: Description and Operation
Throttle Actuator Control (TAC) Module
DESCRIPTION
The Throttle Actuator Control (TAC) module is the "Control Center" for the electronic throttle system. The TAC module and the PCM communicate
via a dedicated redundant serial data circuit. The TAC module and the PCM monitor the commanded throttle position and compare it to the actual
throttle position. This is accomplished by monitoring the Accelerator Pedal Position (APP) and the Throttle Position (TP) sensor. These two values
must be within a calibrated value of each other. The TAC module also monitors each individual circuit of the TP sensor and the APP to verify proper
operation.
