Sorry if my response was less then helpful, the "URT, burn in" on the label suggests the radio has network capabilities.
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I requested year, make, model because it is often possible to track pinout information that way much easier then with an in house part number.
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The Delco part number didn't show up in any net search I attempted, just like with my Toyota part number.
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The part number on my Echo's radio is apparently Toyota's in house part number number used for inventory tracking and I never could find any information using that number, however knowing the year, make and model returned several accurate wiring diagrams with the available options, it was then easy to pick the wiring diagram that applies to my radio and hence the type radio and pinouts.
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I wish you the best of luck and will refrain from responding to anymore of your requests for information to save you the angst of logical and lateral thinking.
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BTW URT almost certainly is short for UART. I'll leave researching what a UART is up to you.
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Oh, you can get an approximate age by opening the radio and reading the date code off the integrated circuits. I also leave that bit of research up to you. As an educated guess, I'd say over 90% of ICs have the date code in a standard format, an IC date code gives you the earliest possible date of manufacture. The date codes of several ICs should narrow the possible DOM to a year or so.
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Oh, DOM is trade slang for Date Of Manufacture.
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Again, good luck and sorry for wasting your time.
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