Power & Ground Circuits (Altima 2.5L)

For ECM power and ground circuit wiring diagram and diagnostic procedure, see Fig 1-Fig 7 . If no problem is found, check ignition signal. See IGNITION SIGNAL CIRCUITS  under IGNITION SYSTEM. For intermittent diagnosis, see INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

For engine control system component locations, see Figure-Figure . ECM is located behind glove box. For ECM connector and terminal view, see Figure. For removal and installation of components, see appropriate REMOVAL & INSTALLATION article.

Fig 1: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 1 Of 7)

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

Fig 2: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 2 Of 7)

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

Fig 3: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 3 Of 7)

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

Fig 4: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 4 Of 7)

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

Fig 5: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 5 Of 7)

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

Fig 6: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 6 Of 7)

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

Fig 7: ECM Power Supply Circuit Diagnostic Procedure (Altima 2.5L - 7 Of 7)

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