TCS Off Switch

WARNING: This page is about a different car, the 2005 Nissan 350Z. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition switch OFF, disconnect the TCS OFF switch connector M9, and check the continuity between terminals 1 and 2.
1. 1-2 : Continuity should exist when pushing the switch.
  : Continuity should not exist when releasing the switch.
Fig 1: Checking Continuity Between TCS OFF Switch Connector Terminals 1 & 2
Courtesy of NISSAN MOTOR CO., U.S.A.