Possible Causes
WARNING: This page is about a different car, the 1996 Ford Probe. However, it is still accessible from the selected car via links, so may be relevant.
Code 22 will set if there is a short in wiring harness between circuits No. 944D and another wire. Code 22 will also set if clockspring is shorted between circuit No. 938 and horn or cruise control wiring. Code 22 will also set if safing sensor is shorted internally or vehicle charging system voltage is too high (more than 17 volts).