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An automotive scan tool (scanner) is an electronic tool used to interface with, diagnose and, sometimes, reprogram vehicle control modules. [1] There are many types from just as many manufacturers, one of the most familiar being the Snap-On Inc. "brick", or MT2500/MTG2500. Snap-On, Hella Gutmann Solutions, OTC/SPX, Xtool india, Autel, Launch ...
A range of rugged hand-held scan tools is available. Simple fault code readers/reset tools are mostly aimed at the consumer level. Professional hand-held scan tools may possess more advanced functions Access more advanced diagnostics; Set manufacturer- or vehicle-specific ECU parameters; Access and control other control units, such as air bag ...
Most professional scan tools require a large database of vehicle definitions. [ 5 ] The signaling of ALDL is similar to the RS-232 serial data standard; differing in the voltages used to denote logical one (usually 0 V DC) and logical zero (either +5 V DC or +12 V DC), and that unlike RS-232, both transmit and receive functions are on the same ...
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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.
The sdparm program may be used to adjust whether to run the scans (EN_BMS) and various parameters for the scan (e.g. period, idle time before run). The drive remains operable during the test. [110] There is a dedicated log for background scan results, separate from the self-test log. Offline data collection