Circuit Description
The intake manifold runner valve system is mounted on the intake manifold and consists of the Intake Manifold Runner Valve (IMRV), the IMRV motor and the IMRV position sensor. The IMRV motor opens and closes the IMRV using multiple gears. See DTC P2009: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK NO. 1) & DTC P2010: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT HIGH (BANK NO. 1) . The valve position sensor detects the opening angle of the IMRV. See DTC P2014, DTC P2016 & DTC P2017 .
The IMRV has a groove on it's upper portion. When the IMRV is closed, air flows through a groove into the cylinder from the intake manifold, so that a dynamic air flow or tumble air flow is generated in the cylinder. The tumble air flow drastically reduces fuel deposits inside the intake air port and the combustion wall surface inside the cylinder. This improves the combustion efficiency by boosting the air-fuel mixture and air flow turbulence. See Fig 1 and Fig 2 .
Related DTCs are:
- P2009 and P2010, see DTC P2009: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK NO. 1) & DTC P2010: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT HIGH (BANK NO. 1) .
- P2014, P2016 and P2017, see DTC P2014, DTC P2016 & DTC P2017 .
DTC P2004 detecting condition is when the IMRV opening angle is more than 20° after requesting the IMRV full close. DTC P2006 detecting condition is when the IMRV opening angle is less than 35° after requesting the IMRV full open.