Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to: Compressor Air Intake Turbocharger System Description

Circuit	Description
5 V Reference	Regulated voltage supplied by the control module.
Signal	The control module input circuit has an internal resistance connected to 5 V.
Low Reference	Grounded through the control module.

Component	Description
B111B Turbocharger Boost/Intake 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. Low temperature produces a high resistance: 1.2 kohms@40°C (104°F) High temperature produces a low resistance: 97 ohms@130°C (266°F) The sensor measures the intake air temperature and pressure between the turbocharger and the throttle body.
K20 Engine Control Module	The control module contains a microprocessor used to process input data to control outputs. 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.

Component

Description

B111B Turbocharger Boost/Intake 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.

Low temperature produces a high resistance: 1.2 kohms@40°C (104°F)
High temperature produces a low resistance: 97 ohms@130°C (266°F)

The sensor measures the intake air temperature and pressure between the turbocharger and the throttle body.

K20 Engine Control Module

The control module contains a microprocessor used to process input data to control outputs.
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.