How Do You Decipher 90-94 Parts Book Gibberish?

[lavabit]

My Legacy has a build date of June 1992.

I can't yet figure out how to read the parts book, so I hope someone can help me out with a question or two.

What are the correct set (or sets if more than one) of numbers that should appear on the ecm that is the correct one for my car's build date?

In the dealer parts book for 90-94, what is the meaning of the abbreviations in headings at the top of the page:

4D, SW, and TW ?

On the parts book page for the ecm, some of the comments are things like

97-9X MT

or

19-24

or

OZ-14

I assume MT is Manual Transmission, but what on earth do those other comments mean?

[SiCkSTi04]

4D, SW, and TW ? four Door, Station Wagon

[Legacy777]

I guess since I posted the parts book I should probably note these things, as it's not overly intuitive.

As noted

4D - Four Door Sedan
SW - Station Wagon
TW - Touring Wagon


For the dates, the first number is the last digit of the manufacturing year. The second number is the month of manufacture. Since after September the month digit is no longer a single digit, the letters X, Y, Z correspond respectively to October, November, & December.

So for example, a date of 97, indicates a manufacture date of July 1989.

2X - October 1992
42 - February 1994
1Z - December 1991
04 - April 1990

There may be some other notes that do not follow this typical nomenclature, but for the most part, the above info should help you properly decipher the parts book. I will post this info in my original thread in the stuff you need to know forum.

Also, the introduction pages in the book are VERY comprehensive in explaining the various codes/remarks that appear in the parts book, including the how to read the dates. Take some time and look through the introduction. You will learn a lot!

[lavabit]

Josh,

Thanks very much! I must have missed that info in the introduction in the clutter of all the other info there.

I've been pulling some all nighters trying to get my friend's Subaru running right.

Bob

[Legacy777]

You're welcome.