Throttle Body and Throttle Position Sensor

The error code on my 1989 Acura Legend indicated my Throttle Position sensor was bad. I wasn't planning on keeping the car long since I rarely use it now, So I bought one from the yard and it is supposed to be good. Better than paying nearly $600 for a new one at the dealer. Anyway, I was looking over mine to get started and noticed a few things. A loose wire - fixed that. Then !!! the top hose on the throttle body is disconnected. I thought a simple matter of just following the curvature and finding where it goes. I can't find it! It looks like some sort of vacuum hose but I can't find it. Can anyone help? I went to the dealer and they said its too old that they don't have any info on it ! What! Anyone help please. I have a picture of what I am talking about but don't know how to post it here.

The error code on my 1989 Acura Legend indicated my Throttle Position sensor was bad. I wasn't planning on keeping the car long since I rarely use it now, So I bought one from the yard and it is supposed to be good. Better than paying nearly $600 for a new one at the dealer. Anyway, I was looking over mine to get started and noticed a few things. A loose wire - fixed that. Then !!! the top hose on the throttle body is disconnected. I thought a simple matter of just following the curvature and finding where it goes. I can't find it! It looks like some sort of vacuum hose but I can't find it. Can anyone help? I went to the dealer and they said its too old that they don't have any info on it ! What! Anyone help please. I have a picture of what I am talking about but don't know how to post it here.
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Correction. Its a 1988 Acura Legend

Besides the TPS itself, is there anything else that could cause this error code?
Is there a way I could check my sensor? By measuring its resistance? What values? HELP!