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International Automotive Technicians Network
Re: 5.7 TPI Code 34
Posted to Technical Discussion Forum on 12/13/1998

Hi Paul

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That depends. When there is no power from the relay the 5v will be pulled down to 2.5v. Upon keyup, you will get a quick 2.5v spike and then your (approx) 400mv. That is until the Fuel pump ... Login to read more.