1999 Dodge Dakota R/T 5.9 JTEC+ Fails during a write attempt. Message displayed Controller unlock timed out / write failed.
Have you guys been successful writing to the JTEC+ ECM? I successfully wrote the VIN to the ECM with my scanner after installing it to the truck. I read the Tune with my MPVI 2 but I can't write to the ECM. Do you guys know if the MPVI interface performs a write on the pin 6 receive SCI line? I monitored the transmit and receive line with a breakout box and seen data transfer on Pin 6 (SCI receive) momentarily and continuous data transfer on pin 7 (transmit SCI)