Hi SRT6exy,
The DTC connector doesn't talk to any of the modules via the CAN Bus - the scanner communicates to the other modules via the SCI network (Serial communication something, don't recall exactly), but if that comm network isn't working, I don't think the ECU does anything except throw a error code. I'll try to check the manual tonight, and also the P2313 code from the TMU (I think the different modules reuse the error code numbers...). You might try blowing the SLA module out or spraying contact cleaner in it, but the chances of that working are slim.
-Jerry