Test Conditions:
WARNING: This page is about a different car, the 1990 Cadillac Seville and 1990 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
No problems detected on TPS or throttle switch circuits. ECM tests for Code EO55 at key off. With key off, the ISC will retract until throttle switch opens, TPS value is read by ECM, and a correction factor is stored. If correction value is the same on 2 consecutive key off cycles, TPS setting is relearned.