Without Scan Tool

Under-dash Fuse / Relay Box Showing ECM Back-up Fuse:

1. Turn the ignition off.
2. Remove the CLOCK/RADIO fuse (10A) from the under-hood relay box.
3. Wait 10 seconds for the ECM to clear its memory, and reinstall the CLOCK/RADIO fuse.

NOTE:
- If the Service Check Connector is jumped, the MIL will stay on.
- Removing the CLOCK fuse also cancels the radio presets and the clock settings. Make a note of the radio presets before removing the fuse so you can reset them.