Thanks for tip on Behind the battery location. Found three modules and overcurrent protection relay. By checking part #'s at an online parts site I found that the 016 545 9532 module is for EGR control and the 007 545 9632 is the idle switch. The EGR control is my main suspect and I'll check the wiring jack for continuity back to my switchover valves for the 3 flaps and egr probably this weekend. Stay tuned for developments...Jack