Oops : Please try again. The simplest method to reset the ECM (Electronic Control Module) is to remove the negative battery cable for about 3-5 mins. Follow your manual for this. The reason i ask is beacause i know that the scion tc runs really. I just had to replace the positive leads to my battery (2005 tC manual trans. they got pretty corroded. Had a slight issue with the wondow not). Reason: Window issue resolved itself, weird. Difficulty: (1-5 1 Time Frame: 1 min Here is how to reset your ECU. On the xA/ xB, it is the black top box to the right (Driver s side) of the.