P2004

DTC P2004 INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK 1)

HINT: These DTCs have been added to meet the requirement for Partial Zero Emission Vehicle (PZEV).

CIRCUIT DESCRIPTION

DTC Detection Condition:

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

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. The valve position sensor detects the opening angle of the IMRV.

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, and P2014, P2016 and P2017.

NOTE: Do not disassemble the IMRV and the IMRV motor.

The ECM fully closes the IMRV during the first idle with the engine coolant temperature is 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. Other than this condition, the ECM fully opens the IMRV.

HINT: After confirming DTCs P2004 and/or P2006, use the hand-held tester to confirm the IACV POSITION (IMRV position sensor output voltage) while performing the IACV MOTOR (IMRV motor) of the ACTIVE TEST.

Wiring Diagram:

INSPECTION PROCEDURE

HINT: Read freeze frame data using hand-held tester or the OBD II scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

Step 1 - 2:

Step 3 - 4:

Step 5 - 6:

Step 6 (Continued):

Hand-held tester

Step 1 - 2:

Step 3 - 4:

OBD II scan tool (Excluding hand-held tester)

CHECK FOR INTERMITTENT PROBLEMS

Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the ECM is in check mode with the hand-held tester. In check mode, the ECM uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.

a. Clear the DTCs.
b. Set the check mode.
c. Perform a simulation test.
d. Check the connector and terminal.
e. Wiggle the harness and the connector.