There is no "SPEC" as in a set voltage or one target voltage, and the 91-01 TPS is not adjustable, but there is a range, large enough drive a mac truck through. The computer learns the range of the installed TPS and uses that range.
http://troubleshootmyvehicle.com/jeep/4.0L/tps-multimeter-test-1
"As the throttle opens, the voltage numbers will increase. This increase in voltage should be smooth and without any gaps or skips. Once the throttle is wide open, your multimeter should read somewhere
between 3.5 to 4.5 Volts DC."
http://troubleshootmyvehicle.com/jeep/4.0L/throttle-position-sensor-tests-1
Thanks heaps , a ton of helpful info there !
As the throttle opens, the voltage numbers will increase. This increase in voltage should be smooth and without any gaps or skips. Once the throttle is wide open, your multimeter should read somewhere
between 3.5 to 4.5 Volts DC.