Without Scan Tool

Data Link Connector And Junction Block:

CLEARING DIAGNOSTIC TROUBLE CODES
To clear the Diagnostic Trouble Codes (DTCs) from the memory of the Engine Control Module (ECM), either to determine if the malfunction will occur again or because repair has been completed, the ECM power feed must be disconnected for at least 60 seconds. To remove power from the ECM, remove the 15A TAIL fuse located in the junction block. If working under the hood, the 40A LAMP fuse in the fuse box on the left front fender apron can be removed to disconnect power to the ECM. Removal of the 40A LAMP fuse will erase memory in the clock and/or radio, so use of the 15A TAIL fuse for this purpose is preferred.

CAUTION: To prevent ECM damage, the ignition switch must be in the "LOCK" position when disconnecting or reconnecting ECM power.