Used Chrysler pcm identification
Posted to Technical Discussion Forum on 8/14/2017
6 Replies
[Correct pcm, new and used.] [rebuilt pcm; semi
programmed]
Sometimes my customers are required to use a used module on
a Chrysler product. The original pcm calibration is
04727737AI. The semi programmed number of the new
unprogrammed pcm was 05150247AC. Now the problem; 247AC can
be programmed into 8 different calibrations.
The programming is a one way process; once programmed to one
of the 8 calibrations, there is no return to either the
universal status or another calibration. So when the
recycler tells you that they are sending a 247AC; because it
is the latest calibration; they are incorrect, unless the
737A? is labeled as such. Notice that the 737AI sticker is
on top of the 247AC label, another hint. No, I do not know
what the difference is between the 8 calibrations; I do know
the wrong calibrations usually turns on different dashboard
warning lights that can not be shut off.
The replacement rebuilt Chrysler unit will also need to be
programmed to the correct calibration. But the Chrysler
parts person may also state that the correct number for a
used unit is 247AC. Incorrect; the calibration makes a huge
difference.
When ordering a used pcm for Chrysler, the module P/N must
match; except for the last letter. There are a few
exceptions on very late numbers that are different, because
there are only so many usable alphabet letters.
Michael from New Jersey
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