What this guide is for:
This guide is designed to help troubleshoot any voltage/ communication related issues. It will include a list of relevant
smarty errors that can occur, and what the common fixes are.
Generally, a voltage issue doesn't mean that there is something wrong with the truck (although it most
certainly can). Below you will find a list of errors and symptoms of a voltage issue.
From what we have seen and generally speaking, if the smarty throws an error between 0% and 100%,
it is often a voltage issue. If it ONLY does it at 100%, it generally isn't.
1, 2, 3, 4, 10, 11, 14, 41, 51, 61, 71 - Communication time-out
A communication time-out means that the Smarty was trying to communicate with the ECM, but at
some point it did not get a response in a timely manner.
5, 6, 7, 8, 9, 12, 15, 16, 17, 18, 19, 20, 22, 42, 43 - Wrong answer from ECM
Wrong answer from ECM means that the request that the Smarty made, was responded to incorrectly.
An example of this is if the initial request was lost.
52 - Checksum not Accepted
Getting checksum not accepted is because of the fact that when Smarty is programming the ECM, after
each single data block is sent, Smarty says to the ECM the checksum of that block. A checksum is
proof of what was sent to the ECM was written correctly.
Do note that any of the above could also be the connections, or in rare cases, the ECM. It entirely
depends on the specific situation.
Things to Check:
In all these cases the best suggestions are:
- Check and clean OBD port
- Remove the ABS and fuel pump fuses/relay during the programming
- Check battery voltage for low voltage
- Check and clean ground pole (negative pole) of batteries
-If the voltage is below 12.6V (post to post), make sure to put a charger to the system.
-Make sure to check battery grounds
-Remove the power temporarily for any aftermarket stereo
If your truck does not start:
-Don't panic! This is usually because the truck does not have complete programming. Once the above
steps have been completed, it should be in good running condition again.
-One trick to try is to remove both positive battery cables, and then turn the key on for about 10-15
minutes. After that, turn the key back off and re-install cables. This drains the capacitors in the system,
which causes the ECM to reset, and often has helped get a truck started in the case where the
usual methods don't work.