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So sometime back I had an issue with my 08 Ford explorer 4.0L. Turns out it was a PCM issue. So now I've ordered another PCM which just arrived. When. Hooking it to the car I cannot get any scan tool.to communicate with it. I contacted the seller and they said that I need to program the keys and do a parameters reset for it to start communicating. The question is can the PATS disable any communication to the PCM or will it only stop the car from starting ?
I'm trying to figure out if the new PCM is dead and needs replacing.
Did you had communication before you replaced the ECU?
For the first: I don't think that the PATS will block the ECU communication. You Need communication anyways to program the fresh ECU.
also check to seeifyou have a 5 volt reference at the tps sensor/ check engine light on the dash during key on engine off. have you checked the power/grounds at the dlc?
Thanks Guys. I thought so too. My old ECU communicates just fine, even a replacement non compatible one works too. Was just wanting to double check with the experts first.
