obd 1-obd 2 ????

i happen to have one of those systems in between the two obd systems,a transitional system i am told,a 94 pontiac,the obd 1 code reader(or the trick of jumping the two top corner slots,flashing check engine light to read the codes)will not work,the pins are lined up differently,and the system is not the obd 2 system at all.i find it hard to believe that there besides an expensive scanner gizmo or paying big bucks at a dealer ,is not some way to read the codes,surely there is someone who has found a way to jump some combo of pins or knows something to read the codes or this system?i keep getting a ABS light on at times and have been told to check the computer codes,can somebody please help.?

Reply to
res0ta8b
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You already know the answer. A serial reader is needed to read the serial data. An ABS reader is needed to read the ABS data. The two readers are often separate devices.

Reply to
=?x-user-defined?Q?=AB?= Paul =?x-user-defined?Q?=BB?=

I've got a 95 with the same issue. The connector is ODB-2 and the computer is ODB-I

You need a cable which costs about 95 dollars (new).. I just sold mine. Check the "electronics" section of

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Reply to
Darin Ginther

Reply to
res0ta8b

Look at:

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I've got a 95 S10 pu with the labeling showing obd1 but it has the 16 pin connector and I can't read the codes by jumpering pins. Info from the above site doesn't show any 1994 GM vehicles as being obd2 compliant.

Reply to
DonW

You already know the answer. A serial reader is needed to read the serial data. An ABS reader is needed to read the ABS data. The two readers are often separate devices.

Reply to
=?x-user-defined?Q?=AB?= Paul =?x-user-defined?Q?=BB?=

You can't jumper anything past 1993. You need an OBD-1 scantool with either a 16-pin or 12-pin cable, depending upon your application.

Reply to
Taz

i don't have an actual obd 1 code reader(which is what the connector is in the car-obd 1) for these i have always jumped the two top left hand side pins to get the "check engine" light flashing the codes,but the pins are in different locations and no combo is working.i do have a obd 2 code reader but the connector is different,all the obd 1 readers i've seen are a one piece just attach it on type,not one's like my obd 2 with a cable hook up.i 'm a little lost on just what exactly i need or jump to get the codes.(short of just taking it in,i'm sure there is some way or reader on the market to handle the transitional years) thanks

Reply to
res0ta8b

Then you are out of luck.

Get an obd 1.5 reader and hook it's serial data wire to aldl pin 09. Hook the ground wire to pin 05, or a suitable ground. If your reader uses car's +12v, then run that wire to the fuse block.

Reply to
=?x-user-defined?Q?=AB?= Paul =?x-user-defined?Q?=BB?=

Reply to
res0ta8b

$20 won't buy a code reader, it will buy a paperclip in a box. Get a serial reader. For a decent unit, prices start at $150. Make sure your new code reader is odb 1.5 capable. The software to read the obd 1.5 serial data may run about $50-$60 more. An adaptor cable may cost about $35, but you can easily make your own out of pieces of wire and some pin parts from a local electronics supply.

Reply to
=?x-user-defined?Q?=AB?= Paul =?x-user-defined?Q?=BB?=

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