A couple months ago I sent my scanmaster to Turbobob, he replaced a bad display and updated it to a 2.1. I went to reinstall it, and on key on engine on, the display would show 2.1 then go blank. It did the same thing prior to my SM failing. In my conversations with TBob, he also said the ALDL may be losing signal from a bad output in the ECM. My local dealer was able to still get me a Delco reman unit, so I ordered it and removed the old ECM tonight and installed the new reman unit after swapping my TT chip over.I tested the 2nd terminal from the far left in the upper row before before swapping ecm's, and before and after the swap I am only getting 2.5v at that pin. In the ecm harness, I did find one broken wire (purple with a white stripe), and repaired as neccesary. I tested ignition to make sure the car starts, it does but my TT chip settings are now defaults since disconnecting the battrry. This wouldnt be a big deal if I could read the malfunction codes on my scanmaster.... AARRGHH!! Ido have a new 2.1 that I ordered from Turbo Tweak in case my old unit was not repairable.
Any suggestions on where to start next? All fuses are good under the dash. the far left pin upper row in the aldl tests at 11.9v. Any help would be appreciated!!
Any suggestions on where to start next? All fuses are good under the dash. the far left pin upper row in the aldl tests at 11.9v. Any help would be appreciated!!