What kind of software does a GM service technician use?

Software. GM’s Technical Information System (TIS)—Service Programming System (SPS), (commonly referred to as TIS2Web) is an Internet utility used by service technicians to reprogram control modules with the latest GM calibration.

How does a GM throttle body relearn procedure?

A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. Over time, carbon buildup can accumulate around the throttle plate, changing it’s “home” position. If the buildup occurs gradually, the PCM “learns” the new home position.

How does the TAC work on a car?

During the battery saver mode, the TAC module removes the voltage from the motor control circuits, which removes the current draw used to maintain the idle position and allows the throttle to return to the spring loaded default position. €€€€•€ Acceleration limiting.

What kind of tuner does GM Gen III PCM use?

A.T.S. OBD-II Tuner is a tuning package only. Early versions of the C.A.T.S OBD-II Tuner supports the Gen III PCMs, (middle) but not the later Gen IV CAN bus systems. The later version of the C.A.T.S. OBD-II Tuner supports both Gen III and Gen IV ECMs and PCMs (top).

Which is the control module of the TAC system?

Engine Control Module The engine control module (ECM) is the control centre for the throttle actuator control (TAC) system. The ECM determines the drivers intent and then calculates the appropriate throttle response. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the TAC motor. Modes of Operation