OBD II
The OBD-II standard specifies the type of diagnostic connector and its pinout, the electrical signaling protocols available, and the messaging format. It also provides a candidate list of vehicle parameters to monitor along with how to encode the data for each. Finally, the OBD-II standard provides an extensible list of DTCs (Diagnostic Trouble Codes).
Currently there are 5 types of OBD II protocols. Protocols are messaging formats that are used for communication.
# SAE J1850 - PWM
# SAE J1850 - VPW
# ISO 9141-2
# ISO 14230-4 - KWP 2000
# ISO 15765-4 / SAE J2480 - Controller Area Network (CAN)
CAN (Controller Area Network) is the newest protocol and it is used for most 2004 and newer cars and it is the standard protocol in the USA since 2008.
Currently there are 5 types of OBD II protocols. Protocols are messaging formats that are used for communication.
# SAE J1850 - PWM
# SAE J1850 - VPW
# ISO 9141-2
# ISO 14230-4 - KWP 2000
# ISO 15765-4 / SAE J2480 - Controller Area Network (CAN)
CAN (Controller Area Network) is the newest protocol and it is used for most 2004 and newer cars and it is the standard protocol in the USA since 2008.
OBD II and EOBD Requirements
- USA: All cars and light trucks built and sold in the United States after January 1, 1996 are required to be OBD II compliant.
- EUROPE: All petrol cars sold within Europe since 1 Jan 2001, and diesel cars sold after 2003, must be EOBD II / EOBD compliant.
- AUSTRALIA: 2004 and newer cars sold in Australia are OBD II complaint. Most of these cars work with the CAN (Controller Area Network) protocol.
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