TDS OBD Scantool

July 3, 2012 OBD Scantool Software Guide

TDS OBD Scantool


The TDS (Teradyne Diagnostic Solutions) Scantool is an OBD (On-Board Diagnostics) compliant software interface, which may be installed on an IBM compatible PC, or on a portable hand-held unit such as a Windows CE/Pocket PC personal digital assistant (PDA).

The Scantool provides the motor vehicle technician with a tool, that allows them to monitor and determine acceptable vehicular emissions levels, and to aid in the diagnosis and repair of vehicular on-board systems.

The Scantool provides full support for vehicles employing the following vehicle network interfaces:

  • SAE J1850 41.6 kbps Pulse Width Modulation
  • SAE J1850 10.4 kbps Variable Pulse Width
  • ISO 9141-2 (5 Baud Initialisation)
  • ISO 14230-4 Keyword protocol 2000 (5 Baud and Fast Initialisation)
  • ISO 15765-4 Controller Area Network (both 11 and 29bit at either 250Kb or 500Kb)

What is OBD ?

During the 80s, the American Environmental Protection Agency (EPA) introduced legislative requirements relating to the reduction of vehicle exhaust gas emissions. The California Air Resources Board (CARB) introduced similar requirements, forcing manufacturers to provide vehicle on-board diagnostic (OBD) capabilities, which would allow accurate measurements of all emissions related data. OBD requirements were extended during the early 90s to provide more sophisticated methods of monitoring emissions, leading to a second generation system of On-board Diagnostics (OBD II). However, vehicle manufacturers were only required to satisfy these requirements in order to sell vehicles within the United States.

Similar requirements were established by the European International Standards Organisation (ISO), during the 90s., which extended these legal requirements to vehicle manufacturers across Europe. These requirements are consistent with OBD II and have been standardised to provide coherent guidelines for vehicle manufacturers worldwide.

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