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Jim Grant's Tech Tips
‘95 &
Up OBDII
Q: I've been in the automotive trade for
35+ years, I’m an ASE triple master tech, and love computerized technology.
My problem is tapping into the OBDII computer for diagnostic codes, like
it was done with EEC, CCC, etc. At this time I am running a small shop
on my own, part time, and cannot warrant the cost of big time diagnostic
equipment. Is there a way to jump terminals or something to get into the
newer systems?? Thanks....Jim Bearfield
A: Today’s
newer vehicle’s computer systems have a new generation of advanced On
Board Diagnostics which is affectionately referred to in our industry
as OBD II. The intent of the OBD II system was to create a common data
port, with a common protocol, for accessing information, primarily emissions
related. The key word is intent. The days of using a jumper wire or pin
to flash codes from a vehicle’s computer is quickly fading away. If you
wish to communicate with today’s vehicle computers you need to determine
the level of information you want access to. The more information you
want the more money you have to pay. A low dollar tool, for checking codes,
turning off the Check Engine Light and with a wee bit of the computer
info, cost around $300 to $400. For the privilege of the above, viewing
more and opening a door or two to the computer jumps the price tag up
to $2000 to $3000. Annual software updates range from $600 to $2000 and
does not cover every vehicle. Now if you want the high, the book store,
encyclopedia factory of information and the ability open all doors in
today’s vehicle computers you need the vehicle manufacturer’s scan tool
and software. Yeah it costs more but wow does this tool make things happen,
but it only works on that manufacturer’s vehicle.
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