System Description

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: DTC P0011, P0021 IVT Control - System Description Chart

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

Fig 2: IVT Control Diagram

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

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake valve.

The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to increase engine torque in low/mid speed range and output in high-speed range.