Engine Control Module

For ECM locations, see Fig 1 or Fig 2 . After ECM replacement, initialize Infiniti Vehicle Immobilizer System (IVIS). See appropriate IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT. On G20, perform idle air volume learning procedure. See IDLE AIR VOLUME LEARNING  under FUEL SYSTEM.

Fig 1: Locating ECM (G20)

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

Fig 2: Locating ECM (Q45)

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