Throttle Body Assembly
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
| Callout | Component Name |
|---|---|
| 1 | Manifold Absolute Pressure (MAP) Sensor |
| 2 | Throttle Valve, Plate |
| 3 | Throttle Shaft |
| 4 | Throttle Control Motor Drive Gear |
| 5 | Throttle Actuator Control (TAC) Module Cover |
| 6 | Engine Coolant Pipe |
| 7 | Throttle Body Housing |
The throttle body functions similar to a conventional throttle body with the following exceptions:
- An electric motor opens and closes the throttle valve.
- The TAC module is an integral part of the throttle body assembly.
- The throttle valve is spring loaded and the default position is slightly open.
- There are 2 individual throttle position (TP) sensors integral to the TAC module cover.
The TP sensors are used to determine the throttle plate angle. The TP sensors provide the TAC module with a signal voltage proportional to throttle plate movement. Both TP sensor signal voltages are low at closed throttle and increase as the throttle opens. TP sensor 1 determines the actual throttle valve position. TP sensor 2 provides a backup value for TP sensor 1.