Failure Conditions
WARNING: This page is about a different car, the 1991 Geo Storm, 1991 Geo Metro, 1990 Geo Storm, and 1990 Geo Metro. However, it is still accessible from the selected car via links, so may be relevant.
Codes 21 and 22 will set if voltage at SENSE LOW input terminal No. A6 is less than 5 volts during first portion of steering column resistance test. This will occur when FORCE HI output terminal No. A4 is open and results in undetermined steering column resistance.