1. Check TCS Monitor Circuit

WARNING: This page is about a different car, the 2004 Infiniti M45 and 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect ASCD control unit connector and VDC/TCS/ABS control unit connector.
Check continuity between ASCD control unit harness connector M35 terminal 2 (OR/L) and VDC/TCS/ABS control unit harness connector E218 terminal 84 (OR/L).
2 - 84 : Continuity should exists
Check continuity between ASCD control unit harness connector M35 terminal 2 (OR/L) and ground.
2 - ground : Continuity should not exist

Refer to wiring diagram in SYSTEM WIRING DIAGRAMS .

OK or NG

OK: GO TO 2.
NG: Repair harness or connector.

Fig 1: Checking TCS Monitor Check Circuit

Courtesy of NISSAN MOTOR CO., U.S.A.