Circuit/System Description

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

Circuit	Description
12V Reference	Regulated voltage supplied by the control module.
Signal	The control module input circuit has an internal resistance connected to 5 V.
Ground	Chassis Ground

Component	Description
B75B Mass Air Flow/Intake Air Temperature Sensor	The assembly has several functions: The mass air flow sensor is a hot film type sensor that measures the mass of air (not the volume) entering the engine. The signal varies with engine load and is displayed by the scan tool in Hertz (Hz) and grams per second (g/s). The temperature sensor is a negative temperature coefficient thermistor, a resistor which changes based on temperature. Low temperature produces a high resistance: 1, 166 ohms @ 40°C (104°F) High temperature produces a low resistance: 97 ohms @ 130°C (266°F)
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.

Component

Description

B75B Mass Air Flow/Intake Air Temperature Sensor

The assembly has several functions:

The mass air flow sensor is a hot film type sensor that measures the mass of air (not the volume) entering the engine. The signal varies with engine load and is displayed by the scan tool in Hertz (Hz) and grams per second (g/s).
The temperature sensor is a negative temperature coefficient thermistor, a resistor which changes based on temperature.
- Low temperature produces a high resistance: 1, 166 ohms @ 40°C (104°F)
- High temperature produces a low resistance: 97 ohms @ 130°C (266°F)

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.