TC0073 veakood 1996 Cadillacidel

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bulletin regarding trouble code - TC0073.
bulletin 63-50-16 dated May 1996.


The bulletin indicates that there was a software bug in the EBTCM (Electronic Brake / Traction Control Module) for 1996 Cadillacs manufactured with the last 6 digits of the VIN number that are smaller numbers than as follows:

Concours / Deville --- 280478
Eldorado ------------- 614516
Seville -------------- 826978

If you are not having a "real" problem and are getting an invalid DTC due to the software bug you should be able to duplicate the problem as follows:

First, turn the rear air conditioning blower to the lowest fan speed setting.
Then, reset the TCS codes to that TC0073 is no longer shown. Now, turn off your engine.
Restart the engine after a few minutes and then run the diagnostics again.
You should find that the TC0073 does not show up.
You should be able to drive around, turn the engine on and off, etc. and the TC0073 should not appear provided that you leave the rear air blower set to the lowest setting.
After trying this out, turn the rear air to the highest blower setting and then turn off the engine.
When you restart the car and run diagnostics the TC0073 should reappear again as though you have a problem.
If this is what happens and your VIN number is within the range as indicated above then you are getting an invalid TC0073 message.

You do not need to do anything about the message.
You could replace the EBTCM since the new ones no longer have the software bug but that would probably cost you well over $600 and it just isn't necessary.