× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: History lesson: Early 90s Ford PSOM/PCM relationship
Posted to Technical Theory Forum on 12/2/2019

I think 8V square wave is just fine. 5V should be also. I assume the PCM is using TTL logic on that circuit. Login to read more.