Up towbar Security LED'S Radio Photos parking extra LED Ecu cruise control alientech

 

What does the OBD-II Connector Look Like?

The connector that's mounted in the car looks like this:



All ISO compatible cars with have pins in all of these locations with, maybe, the exception of the L Line. The L Line is used to wake up the ECU but this can be done via the main data line (K Line) on most newer ECUs.

horizontal rule

Links

bullethttp://sourceforge.net/projects/freediag/
bullethttp://home.ict.nl/~ramklein/Projects/Serial.html
bullethttp://www.naughter.com/
bullethttp://www.codeguru.com/
bullethttp://www.codeproject.com/
bullethttp://www.sysinternals.com/

 

 

 

OBD-II Hardware

Here is OBD-II ISO interface:

The interface is fully ISO compliant, interfaces with both the K and L lines, opto-isolated from the vehicle's data-stream and comes complete with status LEDs. The flow control lines are also connected which makes the interface more universal and compatible with a wider range of software. 

The version 2 board has a selectable link (LK1) which can be used in two configurations:

  1. A Shorted- This grounds the RX circuit thus allowing the interface to receive all traffic.
  2. N Shorted- This puts the RX circuit under RTS control. This is the default setting of the interface.

The version 2 interface also has the facility to fit fuses on both the K and L lines.

This interface will also interface with most Audi and Volkswagens including those with a two-pin connector (not-included).