I have a 1994 Toyota Camry with a 2.2L 4cyl. That was running like a top right up until it died last week. I have checked the fuel system. It appears that I am getting plenty of fuel. Checking the plugs shows that I am not getting any spark. I have checked the plugs, wires, cap, and rotor. All look good. Running out of ideas. I am thinking maybe coil, cam shaft position sensor, or ignition control module, but I don't know how to test any of these. Any ideas on how to test or what is most likely the cause? I have checked the engine codes. No codes listed. CEL gives a constant steady pulse

Your help is greatly appreciated