Dead or weak battery
Faulty Throttle Actuator Control (TAC) module
Throttle Actuator Control (TAC) module harness is ope or shorted
Throttle Actuator Control (TAC) module circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
No throttle response
The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from random access memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Diagnostic Trouble Code (DTC) is set.