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General Motors implemented both a 5-pin connector and a 12-pin connector, with the 12 pin connector (Packard/Delco/Delphi part number 12020043) being used in the vast majority of GM cars. Lotus implemented a 10-pin connector. The pins are given letter designations in the following layouts (as seen from the front of the vehicle connector):
OBD 1.5 refers to a partial implementation of OBD-II which General Motors used on some vehicles in 1994, 1995 & 1996 (GM did not use the term OBD 1.5 in the documentation for these vehicles — they simply had an OBD and an OBD-II section in the service manual).
Also, prior to 1996, there was no standardization for these connectors, and each manufacturer had its own shape with a unique pin arrangement. After 1996, many manufacturers retained their proprietary connectors in addition to the OBD-II interface, because OBD-II ports are only required to transmit emission-related codes and data. [2]
The transverse use of GM's LS small-block engine in the W-bodies was a major addition for 2005. The GM W Platform was phased out with the production of the new long-wheelbase Epsilon II platform . The last car produced on the W platform was the ninth generation of the Chevrolet Impala , which was replaced by the Epsilon-based tenth-generation ...
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections .
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.
The problems reflect bugs that were present in ELM's version 1.4 microcode; those making the clones may continue to sell the old version. Although these copies may contain the ELM327 v1.4 code, they may falsely report the version number as the current version provided by the genuine ELM327, and in some cases report an as-yet non-existent ...
Transport-layer services include the transmission of multi-CAN-frame messages based on the ISO 15765-2 multi-frame messaging scheme. It was developed and is used primarily by General Motors for in-vehicle communication and diagnostics. [3]