P2004
4GR-FSE ENGINE CONTROL: SFI SYSTEM: P2004, P2006: Intake Manifold Runner Control Stuck Open (Bank 1)
P2006 - Intake Manifold Runner Control Stuck Closed (Bank 1)
DESCRIPTION
The Swirl Control Valves (SCV) are built into the intake manifold. The swirl control valves use a position sensor and a DC motor. A swirl control valve is located at one side of each pair of independent intake ports. Depending on signals from the ECM, the DC motor opens and closes the swirl control valves. The position sensor detects the opening angle of the swirl control valves. When the swirl control valves close, the velocity of the intake air flow that passes through the port on the other side of the independent intake port will become faster, enhancing lateral turbulent flow in the combustion chamber. As a result, when engine coolant temperature is low, atomization of fuel will be enhanced, stabilizing combustion in the cylinder. Also fuel consumption is decreased due to increased combustion efficiency when the engine is running at a low speed with a light load.
HINT
After confirming DTC P2004 or P2006, use the Techstream to confirm the IAC Sensor Voltage (swirl control valve position sensor output voltage) while performing Control the SCV Duty Ratio of the Active Test.
Reference (Normal condition)
MONITOR DESCRIPTION
When the ECM has requested a swirl control valve close operation but the swirl control valve's actual opening angle is 20° or more for 10 seconds, DTC P2004 is output. When the ECM has requested a swirl control valve open operation but the swirl control valve's actual opening angle is less than 35° for 10 seconds, DTC P2006 is output.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
P2004: Intake manifold runner control stuck open
P2006: Intake manifold runner control stuck closed
COMPONENT OPERATING RANGE
CONFIRMATION DRIVING PATTERN
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.
5. Turn the engine switch off and wait for at least 30 seconds.
6. Turn the engine switch on (IG) and turn the Techstream on [A].
7. Enter the following menus: Powertrain / Engine / Data List / All Data / Coolant Temp.
HINT
- Check DTC P2004 at a coolant temperature of 30°C (86°F) or less.
- Check DTC P2006 at a coolant temperature of 80°C (176°F) or higher.
8. Turn the engine switch off.
9. Turn the engine switch on (IG), wait approximately 10 seconds, and then turn the engine switch off. Repeat this procedure 3 times [B].
10. Enter the following menus: Powertrain / Engine / Trouble Codes [C].
11. Read Pending DTCs.
HINT
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
13. Input the DTC: P2004 or P2006.
14. Check the DTC judgment result.
HINT
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
15. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.
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 ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
(e) Read the DTCs.
Result:
HINT
If any DTCs other than P2004 or P2006 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART SFI System
A -- Continue to next step.
2. INSPECT INTAKE MANIFOLD (SWIRL CONTROL VALVE OPERATION)
(a) Inspect the intake manifold Intake System.
NG -- REPLACE INTAKE MANIFOLD Removal
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR CONTROL VALVE ACTUATOR)
(a) Disconnect the ECM connector.
(b) Disconnect the intake air control valve actuator connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
(d) Reconnect the ECM connector.
(e) Reconnect the intake air control valve actuator connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
(e) Turn the engine switch off and wait for at least 30 seconds.
(f) Turn the engine switch on (IG).
(g) Turn the Techstream on.
(h) Drive the vehicle accordance with the driving pattern described in the Confirmation Driving Pattern.
(i) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.
(j) Read the pending DTCs.
Result:
B -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems
A -- REPLACE ECM Removal