Dtc P2004 Intake Manifold Runner Control Stuck Open (Bank 1)

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fse Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)

INSPECT INTAKE MANIFOLD

INSPECT INTAKE MANIFOLD (DC MOTOR FOR SCV OPERATION)

CHECK HARNESS AND CONNECTOR (ECM - DTC MOTOR FOR SCV)

CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006)

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

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


DESCRIPTION

The Swirl Control Valve (SCV) is built into the intake manifold. The SCV consists of the position sensor and a DC motor. The SCV is attached to one side of the independent intake port. Depending on signals from the ECM, the DC motor opens and closes the SCV. The position sensor detects the opening angle of the SCV. When the SCV closes, the intake air flow velocity that will pass through the port on the other side of the independent intake port will become faster, which causes the lateral turbulence of the fuel in the fuel tank to strengthen. As a result, when engine coolant temperature is low, the fuel's atoms accelerate and the fuel's stability increases. Also, when the engine is running with a light load, the fuel efficiency increases, decreasing fuel consumption.
When the ECM has requested an SCV close operation but the SCV's actual opening angle is more than 20° for 1 second, DTC P2004 is output. When the ECM has requested an SCV open operation but the SCV's actual opening angle is less than 35° for 1 second, DTC P2006 is output.

DTC No.
DTC Detection Condition
Trouble Area
P2004
(Stuck open)
When the SCV opening angle is more than 20°after requesting the SCV full close
  1. DC Motor for SCV circuit
  2. DC Motor for SCV
  3. SCV position sensor
  4. SCV
  5. ECM
P2006
(Stuck closed)
When the SCV opening angle is less than 35°after requesting the SCV full open
  1. Same as DTC No. P2004
HINT:
After confirming DTCs P2004 and/or P2006, use the intelligent tester to confirm the SCV Angle Sensor (D4) (SCV position sensor output voltage) while performing the Control the SCV Duty Ratio (DC Motor for SCV) of the Active Test.

Reference (Normal condition):
Control the SCV Duty Ratio operation
SCV Angle Sensor (D4)
100 %
3.2 to 4.8 V
-100 %
0.2 to 1.0 V

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System. Dtc P2004 Intake Manifold Runner Control Stuck Open (Bank 1)


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Enter the following menus: Power train / Engine / DTC.

  1. Read DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P2004 or P2006
    		A
    P2004 or P2006 and other DTCs
    		B
HINT:
If any DTCs other than P2111 or P2112 are output, troubleshoot those DTCs first.


B
GO TO DTC CHART
A


2.INSPECT INTAKE MANIFOLD

  1. When the engine switch is turned from off to on (IG), check that the SCV links move.

    OK:
    SCV links move.


OK
Go to step 5
NG


3.INSPECT INTAKE MANIFOLD (DC MOTOR FOR SCV OPERATION)


NG
REPLACE INTAKE MANIFOLD
OK


4.CHECK HARNESS AND CONNECTOR (ECM - DTC MOTOR FOR SCV)
Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System. Dtc P2004 Intake Manifold Runner Control Stuck Open (Bank 1)

  1. Disconnect the E64 DC motor for SCV connector.

  1. Disconnect the E45 ECM connector.

  1. Measure the resistance.

    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    IA1- (E45-1) - E64-2
    		Below 1 Ω
    IA1+ (E45-2) - E64-1
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Specified Condition
    IA1- (E45-1) or E64-2 - Body ground
    		10 kΩ or higher
    IA1+ (E45-2) or E64-1 - body ground
    		10 kΩ or higher

  1. Reconnect the ECM connector.

  1. Reconnect the DC motor for SCV connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Clear DTCs.

  1. Enter the following menus: Power train / Engine / DTC.

  1. Read DTCs.

    Result:
    Display (DTC Output)
    		Proceed to
    P2004 or P2006
    		A
    No DTC
    		B


B
SYSTEM OK
A

REPLACE ECM