How To Erase Self-Diagnostic Results (Malfunction Codes)

WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the check terminal from ground (ABS warning lamp will stay lit).
Within 12.5 seconds, ground the check terminal three times. Each terminal ground must last more than 1 second. The ABS warning lamp goes out after the erase operation has been completed.
Perform self-diagnosis again. Refer to ON BOARD DIAGNOSTICS SYSTEM DESCRIPTION . Only the start-code should appear, no malfunction codes.

Fig 1: Erasing Malfunction Code Memory
Courtesy of NISSAN MOTOR CO., U.S.A.