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3. Dialog for modifying the password required for the root permission (on/off)
status
Note: The state of the root switch will be reset to off after the factory settings are
restored, and the password will be restored to the initial password.
3.7 OBD Interface (optional)
3.7.1 Overview
The OBD-II interface of PC-7146 is recommend for car and commercial vehicle
applications. Second Generation (OBD-II) is a set of standards for implementing
a computer based system to control emissions from vehicles by Society of
Automotive Engineers (SAE) in 1988. It was first introduced in the United States
in 1994, and became a requirement on all 1996 and newer US vehicles. Other
countries, including Canada, parts of the European Union, Japan, Australia, and
Brazil adopted similar legislation. A large portion of the modern vehicle fleet
supports OBD-II or one of its regional flavors.
Among other things, OBD-II requires that each compliant vehicle be equipped
with a standard diagnostic connector (DLC) and describes a standard way of
communicating with the vehicle’s computer, also known as
the ECU (Electronic
Control Unit). A wealth of information can be obtained by tapping into the OBD
bus, including the status of the malfunction indicator light (MIL), diagnostic
trouble codes (DTCs), inspection and maintenance (I/M) information, freeze
frames, VIN, hundreds of real-time parameters, and more.
3.7.2 Support protocol
ISO 15765-4 CAN (11 bit ID, 500 kbaud)
ISO 15765-4 CAN (29 bit ID, 500 kbaud)
ISO 15765-4 CAN (11 bit ID, 250 kbaud)
ISO 15765-4 CAN (29 bit ID, 250 kbaud)
SAE J1850 PWM (41.6 kbaud)
SAE J1850 VPW (10.4 kbaud)
ISO 9141-2 (5 baud init)
ISO 14230-4 KWP (5 baud init)
ISO 14230-4 KWP (fast init)
