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Re: 04 Tacoma no 5v ref, no cam crank signal
Posted to Technical Discussion Forum on 1/20/2018

only to add to others....while unplugging sensors, and monitoring for the 5v reference to come back, you want to cycle the key after each component is unplugged.

Also see if an A/C sensor is on that 5V circuit. That comes to mind as a case I may have read in... Login to read more.