Circuit/System Description
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
| Component | Description |
|---|---|
| B75C Multifunction Intake Air Sensor | The assembly has several functions:
|
| B65 Intake Manifold Pressure and Air Temperature Sensor | The assembly has several functions: Pressure The signal voltage increases when the pressure increases. Temperature The temperature sensor is a negative temperature coefficient thermistor, a resistor which changes based on temperature.
The intake air temperature sensor 3 and the intake manifold pressure sensor are integrated in the same housing, which is located behind the throttle body. The sensor measures the temperature and pressure in the intake manifold between the throttle valve and the intake valves. |
| K20 Engine Control Module | The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly. |
| Q38 Throttle Body | The throttle body contains a contactless inductive position sensor. A fixed transmitter coil excites a movable rotor, which in turn induces a current in a fixed receiver coil. The current varies with the angle of the rotor. Electronics inside the sensor convert the current into digital data which is transmitted via a serial data circuit to the ECM. |
The ECM compares the measured mass air flow with the calculated air flow based on throttle position and the calculated air flow based on manifold absolute pressure.