P2004

2AZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P2004,P2006: Intake Manifold Runner Control Stuck Open (Bank 1)

DTC P2004 - Intake Manifold Runner Control Stuck Open (Bank 1)

DTC P2006 - Intake Manifold Runner Control Stuck Closed (Bank 1)

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 P2009for details). The valve position sensor detects the opening angle of the IMRV P2014 for details).
The IMRV has a groove on its 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.
The related DTCs are P2009 and P2010 P2009, and P2014, P2016 and P2017 P2014.
NOTICE: Do not disassemble the IMRV and the IMRV motor.





The ECM fully closes the IMRV during the first idle with the engine coolant temperature more than -10°C (14°F) and less than 60°C (140°F) and the intake air temperature is more than -10°C (14°F) before the engine is warmed up. In other condition, the ECM fully opens the IMRV.

Open and closed condition for IMRV:

















MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All:





P2004:





P2006:





TYPICAL MALFUNCTION THRESHOLDS

P2004:





P2006:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

1. CHECK WHETHER DTC OUTPUT RECURS
(a) Clear the DTC DTC Check / Clear.
(b) Start the engine.
(c) Allow the engine to idle for 20 seconds or more after running the engine at more than 3,000 rpm for 20 seconds.
(d) Turn the ignition switch off. Let the engine remain stopped for 20 seconds.
HINT: As running the engine to 3,000 rpm, the IMRV usually becomes fully opened. If the ignition switch is turned off under this condition, the IMRV is fully closed and then becomes half-opening angle.
(e) Connect the Techstream to the DLC3.
(f) Turn the ignition switch to the ON position.
(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
Result:






B -- CHECK FOR INTERMITTENT PROBLEMS
A -- REPLACE INTAKE MANIFOLD RUNNER VALVE ASSEMBLY