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WHAT IS OBD?
OBD stands for “On-Board Diagnostics.” It is a computer-based system originally designed to reduce emissions by monitoring the performance of major engine components.
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Which OBD-II protocol is supported by my vehicle?
All cars and light trucks built for sale in the United States after 1996 are required to be OBD-II compliant. The European Union OBD legislation is somewhat more complicated.
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What is an OBD adapter?
Communication protocols used in modern vehicles are incompatible with standard computer protocols (RS-232, USB, and so on). An OBD adapter (sometimes referred to as “vehicle interface adapter”) is an electronic device that allows a computer to access the vehicle network. It is similar in operation to a computer modem or a gateway, in that it translates messages from one protocol to another.
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What data is available from OBD?
OBD-II offers a standard way to access many types of data, including:
Real-time parameters: RPM, speed, pedal position, spark advance, airflow rate, coolant temperature, etc.
Status of “Check Engine” light
Emission readiness status
Freeze frame: a “snapshot” of parameters at the time a trouble event has occurred.
Diagnostic trouble codes (DTCs).
Oxygen sensor test results
Vehicle Identification Number (VIN)
Number of ignition cycles
Number of miles driven with MIL on넶42 2021-01-27
What data is available from OBD?
OBD-II offers a standard way to access many types of data, including:
- Real-time parameters: RPM, speed, pedal position, spark advance, airflow rate, coolant temperature, etc.
- Status of “Check Engine” light
- Emission readiness status
- Freeze frame: a “snapshot” of parameters at the time a trouble event has occurred.
- Diagnostic trouble codes (DTCs).
- Oxygen sensor test results
- Vehicle Identification Number (VIN)
- Number of ignition cycles
- Number of miles driven with MIL on
