focus st170 fuel rail sensor checking?

[subevo]

got a fault code po193 which is fuel rail pressure sensor signal high.how do i check this sensor/transducer is ok.as far as i know its fed 5volts from ecu.at idle it should be o.5 volts at full throttle it should be 4.5volts but on mine with ignition on its a 3 pin plug each pin to earth reads pin 1 5.0v pin 2 4.6v pin 3 4.9 v.when checking fuel rail side sensor/connector with power off i cant get any reading with meter set to ohms but my mate says thats because its a transistor.anyone know how to check this sensor before i fork out £155 for a new one.

[subevo]

update the sensor itself has these readings.(had meter on wrong ohms setting) pins 1 and 2 =1.42kohms pins 2 and 3 =26.2k0hms pins 1 and 3 26.2kohms these results are with fuel rail 0psi and 30psi makes no difference so it may be sensor itself can anyone verify this.someone must know.

Edited by subevo on Saturday 30th January 17:29

[subevo]

problem sorted.found short at ecu.