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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)
G00010187Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Locating ECM (Q45)
G99H08877Courtesy of NISSAN MOTOR CO., U.S.A.