Hey I am having 2 new issues with my2001 trooper. Main concern is that my TOD Check light keeps flashing. But it flashes randomly, from idle to about 38mph then goes off. In the manual it says itis in backup mode that it wont shift by itself. But it shifts fine, TOD works fine. So not sure exactly whats up withit. Also my heat is gone, checked all the fuses everything looks good. Havent changed the EGR valve because it drives fine, no rough idling. My friends have said maybe it was the way I hooked up my subwoofer to the car, some wiring issue?? but I have had it in the car for 30,000 miles so i am doubting that. If anyone knows whats going, I will greatly appreciate it!!!