Originally Posted by 89cherokeeJP
what would cause the tcm code to throw
There is no tcm or tcm code unless it's a 95 or down. AAP's code reader probably couldn't get past P0700 or P1700, which are top level codes and the parts clerk didn't know any better.
If you have a transmission related code, the PCM
will code P07** or P17** on a generic scan tool. Go somewhere that has a generic scan tool, not a code reader.
I am fairly certain a 98 will NOT display MIL code with key sequencing, but if you want to try it:
(1) Cycle the ignition key On - Off - On - Off - On
within 5 seconds.
(2) After a short pause, the mileage shown on the
vehicles digital odometer will be temporarily deleted.
After this occurs, read the DTC number displayed on
the odometer. Each two–digit number will be displayed
with a slight delay between numbers.
(3) A DTC number 55 will always be the last code
to be displayed. This indicates the end of all stored
codes. After code 55 has been displayed, the odometer
will return to its normal mode.