Code 22, SAFING Sensor Shorted: Description
WARNING: This page is about a different car, the 1993 Mercury Sable, 1993 Lincoln Continental, and 1993 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic monitor measures voltage at terminals No. 11 and 12. Voltage at these 2 terminals are controlled by 2 resistors inside diagnostic monitor and resistors located within impact sensors. This voltage varies with charging system voltage. If voltage at both terminals exceeds 5 volts, Code 22 will be set.