" Exhaust Sensor/Servo Eliminator ? " I am not the owner of a manual, but to me you seem to have 2 different components lumped together and one wire at pin 5 ?
Is the 'exhaust sensor' a oxygen sensor (screws into the exhaust pipe) and the servo component is the exhaust pipe vane that is connected via cables up to the servo actuator motor up towards the underneath of the frame.
I am thinking that 2 sensors are involved, not just the one. So there would be one more wire at the ECU requiring your attention ?
Most people who try to remove the servo actuator get alarm's like you, and the advice is to remount the actuator minus the vane cables and just connect up the actuator wiring to the loom and the small weight saving loss is better than the alarm light being up.
When you switch it back on, the actuator will sort itself out as though you had never touched it.
So if you have indeed done this via another post somewhere here, is it the O2 sensor that is at Pin 5 then ?