Viking DSI Bake Ignitor Won't Spark
This isn't an answer for your specific problem, but I can't paste images into comments, so I'm writing this up as an answer anyway. Some Googling was able to turn up the Viking technician's manual for self-cleaning ranges, which includes troubleshooting tips for non-ignition. I've copied in what look like the relevant sections below in case the link stops working (which is pretty likely, given it's only cached by Google right now).