Project Description

Speed/RPM Demo

Throttle/MAF Demo

Mass Air Flow Sensor and Grams / second

To connect the Arduino to the vehicle, a CAN-Bus Shield must be used.  A CAN-Bus Arduino shield is used to give the Arduino access to vehicle On-Board-Diagnostics (OBD).  A library is available for the CAN-Bus shield and will simplify the process of acquiring data and printing it to the Arduino Serial Monitor.  The Arduino will print OBD data to the Serial Monitor.

Standard OBD-II ports are mandatory for most automotive vehicles sold in the United States and must be located within 2ft of the steering wheel.  The CAN-Bus cable allows the user to access the pins on a car's OBD-II connector.  It has an OBD-II connector on one end and a DB9 male serial connector on the other.

The following information can be obtained from OBD-II:

●     Real-time powertrain information (engine, speed)

●     Real-time sensor data (temperatures, pressures, voltages)

●     Running distance and time

●     Vehicle Diagnostic Trouble Codes (DTCs)

●     Vehicle identification number

Speed & RPM data successfully being passed through the CAM-Bus connection.

Throttle & MAF Sensor data successfully being passed through the CAM-Bus connection.