Diagnostic Procedure

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

NOTE: For component inspection, see COMPONENT INSPECTION and for intermittents, INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.

For diagnostic procedure, see Fig 1 - Fig 3 .

Fig 1: Identifying Diagnostic Procedure For DTC P1490: Vacuum Cut Valve Bypass Valve (Steps 1-2 Of 8)

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

Fig 2: Identifying Diagnostic Procedure For DTC P1490: Vacuum Cut Valve Bypass Valve (Steps 3-5 Of 8)

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

Fig 3: Identifying Diagnostic Procedure For DTC P1490: Vacuum Cut Valve Bypass Valve (Steps 6-8 Of 8)

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