Note the difference in pin ordering between the connectors and the fact that the letter I is not used. The pins are given letter designations in the following layouts (as seen from the front of the vehicle connector): 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. There were at least four different connectors used with ALDL. In the late 1980s the system was migrated to the ADTS system (ALDL Development and Test System) which utilized an industrialized IBM PC with custom interface hardware.
The connector is usually located under the dash on the driver's side of left-hand drive (LHD) vehicles, though this location was not standardized.įor the assembly plant test system computer that was connected to this vehicle connector and known by the same name, see the article IBM Series/1. ALDL was largely used by manufacturers for diagnostics at their dealerships and official maintenance facilities.
This system was only vaguely standardized and suffered from the fact that specifications for the communications link varied from one model to the next. It was previously called Assembly Line Communications Link or ALCL. Like other modems, it is a type of transceiver.Assembly Line Diagnostic Link or ALDL is a proprietary on-board diagnostics system developed by General Motors before the standardization of OBD-2. type = USB modem photo = caption = first release date = Octodiscontinuation date = processor = baseprice = US$49 website = [ 800 MY… … WikipediaĭSL modem - Westell Model 6100 AXXDSL modem A Digital Subscriber Line (DSL) modem is a device used to connect a computer or router to a telephone circuit that has Digital Subscriber Line service configured.
The name stems from the historical use of the RS 232 cable to connect two teleprinter devices… … WikipediaĪpple USB Modem - Infobox Computer name = Apple USB Modem developer = Apple Inc. Null modem - A null modem adapter Null modem is a communication method to connect two DTEs (computer, terminal, printer etc.) directly using an RS 232 serial cable. A modem (modulator demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. Modem - For other uses, see Modem (disambiguation).
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