Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM
CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)
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 | DC Motor for SCV circuit DC Motor for SCV SCV position sensor SCV ECM |
| P2006 (Stuck closed) | When the SCV opening angle is less than 35°after requesting the SCV full open | Same as DTC No. P2004 |
- HINT:
- After confirming DTCs P2004 and/or P2006, use the intelligent tester to confirm the SCV ANG SENS D4 (SCV position sensor output voltage) while performing the SCV DUTY RATIO (DC Motor for SCV) of the ACTIVE TEST.
| SCV DUTY RATIO operation | SCV ANG SENS D4 |
| 100 % | 3.2 to 4.8 V |
| -100 % | 0.2 to 1.0 V |
WIRING DIAGRAM
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) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Enter the following menus: Power train / Engine / DTC.
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 P2004 or P2006 are output, troubleshoot those DTCs first.
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| NG | |
| 3.INSPECT INTAKE MANIFOLD (DC MOTOR FOR SCV OPERATION) |
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| OK | |
| 4.CHECK HARNESS AND CONNECTOR (ECM - DTC MOTOR FOR SCV) |
Disconnect the E6 ECM connector.
Disconnect the E53 DC motor for SCV connector.
Measure the resistance of the wire harness side connector.
- Standard resistance (Check for short):
Tester Connection Specified Condition IA1- (E6-1) - E53-2 Below 1 Ω IA1+ (E6-2) - E53-1 Below 1 Ω
- Standard resistance (Check for short):
Tester Connection Specified Condition IA1- (E6-1) or E53-2 - Body ground 10 kΩ or higher IA1+ (E6-2) or E53-1 - body ground 10 kΩ or higher
Reconnect the ECM connector.
Reconnect the DC motor for SCV connector.
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| OK | |
| 5.CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester ON.
Clear DTCs.
Enter the following menus: Power train / Engine / DTC.
Read DTCs.
- Result:
Display (DTC Output) Proceed to P2004 or P2006 A No DTC B
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| A | ||
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