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  2. General Motors Local Area Network - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Local_Area...

    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] GM's Tech2 uses the CANdi (Controller Area Network diagnostic interface) adapter to communicate over GMLAN.

  3. ALDL - Wikipedia

    en.wikipedia.org/wiki/ALDL

    To ensure high quality in the Computer Command Control system, it will be given a final check at the end of the assembly line. Here the completely assembled vehicle will be tested by connecting the computer to a test computer. This will significantly improve GM's ability to catch anything wrong with the system or the car's engine." [1] [2] [3]

  4. On-board diagnostics - Wikipedia

    en.wikipedia.org/wiki/On-board_diagnostics

    (GM did not use the term OBD 1.5 in the documentation for these vehicles — they simply have an OBD and an OBD-II section in the service manual.) For example, the 1994–1995 model year Corvettes have one post-catalyst oxygen sensor (although they have two catalytic converters), and have a subset of the OBD-II codes implemented. [20]

  5. OBD-II PIDs - Wikipedia

    en.wikipedia.org/wiki/OBD-II_PIDs

    OBD-II as defined by the CARB: 2: OBD as defined by the EPA: 3: OBD and OBD-II 4: OBD-I 5: Not OBD compliant 6: EOBD (Europe) 7: EOBD and OBD-II 8: EOBD and OBD 9: EOBD, OBD and OBD II 10: JOBD (Japan) 11: JOBD and OBD II 12: JOBD and EOBD 13: JOBD, EOBD, and OBD II 14: Reserved 15: Reserved 16: Reserved 17: Engine Manufacturer Diagnostics (EMD) 18

  6. ELM327 - Wikipedia

    en.wikipedia.org/wiki/ELM327

    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 ...

  7. GM to cut at least 1,000 software jobs, biggest impact at GM ...

    www.aol.com/news/gm-cut-least-1-000-144048826.html

    GM is trimming its software teams globally by more than 1,000, possibly up to 1,500. The company says it's for efficiency, not cost cutting. GM to cut at least 1,000 software jobs, biggest impact ...

  8. Scan tool - Wikipedia

    en.wikipedia.org/wiki/Scan_tool

    OBD 1 vs OBD 2 the vehicle will also dictate what the scan tool is able to display. If the vehicle is equipped with OBD 1 it will have significantly less available data when compared to a vehicle equipped with OBD 2. [3] When a vehicle detects a problem, it generates a DTC code which is a unique code that corresponds to the specific problem ...

  9. Check engine light - Wikipedia

    en.wikipedia.org/wiki/Check_engine_light

    When the computer detected a fault, it illuminated the MIL. Up until OBDII, on most cars the MIL could output codes. When two pins on the ALDL are jumped, the light would flash the codes, for instance (blink) (pause) (blink) (blink) for code 12. Some manufacturers, such as Honda, retained this feature even after OBDII.