OBDII diagnostic port [Archive] - GrandAmGT.com Forum


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02-12-2011, 06:17 PM
I can't get my OBDII diag port to work. I've verified that it's gettin power, ground and that there's continuity in the class 2 data wire to the bcm. I'm getting ready to buy hp tuners but need to get this working first. I have alldata and I'm pretty handy with a multimeter but this class 2 stuff baffles me.

When I hook up my OBDII scanner it says "waiting for vehicle to respond" and then it times out after a couple of minutes. Any help is greatly appreciated.