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in the commercial vehicle area for communication throughout the vehicle, with the
physical layer defined in ISO 11898.
J1850
Defines a serial data protocol. There are two variants- 10.4 Kbit/s (single wire, VPW) and
4 1.6 Kbit/s (two wire, PWM). Mainly used by US manufacturers, also known as PCI
(Chrysler, 10.4 Kbit/s), Class 2 (GM, 10.4 Kbit/s), and SCP (Ford, 41.6 Kbit/s).
OBD
On-board diagnostics (OBD) is an automotive term referring to a vehicle's self-diagnostic
and reporting capability. OBD systems give the vehicle owner or repair technician access
to the status of the various vehicle engine systems.
OBD- II diagnostic connector
The OBD-II DLC (post-1996 vehicles) is usually located under the instrument panel on
the driver side, though there are several exceptions. The SAE J196 2 specification
provides for two standardized hardware interfaces, called type A and type B. Both are
female, 9-pin (2x8), D-shaped connectors, and both have a groove between the two rows
of pins.
DLC
The data link connector (DLC) is the multi-pin diagnostic connection port for automobiles,
trucks, and motorcycles used to interface a scan tool with the control modules of a given
vehicle and access on-board diagnostics and live data streams.
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