Clearing Continuous Memory Codes
WARNING: This page is about a different car, the 1987 Mercury Topaz and 1987 Ford Tempo. However, it is still accessible from the selected car via links, so may be relevant.
Perform KEY ON/ENGINE OFF (KOEO) SELF-TEST. When the first service code appears, exit SELF-TEST by disconnecting diagnostic tester or by removing jumper wire from Self-Test Input (STI) pigtail. Exiting QUICK TEST in this manner will clear all codes stored in continuous memory.