Code 23 - Open SAFING Sensor Circuit: Description
WARNING: This page is about a different car, the 1995 Mercury Mystique and 1995 Ford Contour. However, it is still accessible from the selected car via links, so may be relevant.
Battery voltage is applied to terminal 15 of diagnostic monitor at all times. Voltage at terminal No. 15 can be as high as 25 volts when ignition is on and backup power supply in diagnostic monitor is charged up. Orange wire is connected to Yellow/Black wire inside of safing sensor. Voltage at terminal No. 23 should be same as voltage at terminal No. 15 at all times. Diagnostic monitor compares voltage available at terminals No. 15 and 23. If voltage at terminal No. 23 is low, Code 23 will set.