Lexus IS250 IS220d GSE20 ALE20 4GR-FSE ENGINE CONTROL SYSTEM

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE SCV)

CHECK HARNESS AND CONNECTOR (SCV POSITION SENSOR - ECM)

INSPECT ECM (VC2 VOLTAGE)

REPLACE INTAKE MANIFOLD

CHECK WHETHER DTC OUTPUT RECURS (DTC P2014, P2016 AND/OR P2017 ARE OUTPUT AGAIN)

DTC P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1)

DTC P2016 Intake Manifold Runner Position Sensor / Switch Circuit Low (Bank 1)

DTC P2017 Intake Manifold Runner Position Sensor / Switch Circuit High (Bank 1)

DESCRIPTION

The Swirl Control Valve (SCV) position sensor is a non-contact type.


The position sensor measures the opening angle of the SCV. The sensor is reliable and accurate, as it is electrically controlled by Hall elements.


The ECM's IACI terminal voltage increases in correlation with the opening angle of the SCV. When the SCV is fully closed, approximately 0.6 V is applied to the IACI terminal. When the SCV is fully open, approximately 3.6 V is applied to the IACI terminal.


When the output voltage of the IACI terminal deviates from the standard range, the ECM determines that a malfunction has occurred in the position sensor and outputs a DTC.


Dtc P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1). 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

DTC No.DTC Detection ConditionTrouble Area
P2014SCV position sensor output voltage flutters up and down beyond the normal operating range
(Less than 0.2 V or more than 4.8 V for more than 0.5 seconds)
(Open or short)
Open or short in SCV position sensor circuit
SCV position sensor
ECM
P2016SCV position sensor output voltage is less than 0.2 V for more than 0.5 seconds (Short)Same as DTC No. P2014
P2017SCV position sensor output voltage is more than 4.8 V for more than 0.5 seconds (Open)Same as DTC No. P2014
  • HINT:
  • After confirming DTC P2014, P2016 or P2017, use the intelligent tester to confirm the SCV Angle Sensor (D4) (SCV position sensor output voltage) from Power train / Engine / Data List.
SCV ANG SENS D4Malfunction
0.2 V or less
IACI circuit short
VC2 circuit open
4.8 V or more
VC2 and IACI circuit short-circuited
IACI circuit open
E3 circuit open

WIRING DIAGRAM

Dtc P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1). 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

  • HINT:
If different DTCs that are related to a different system are output simultaneously while terminal E3 is used as a ground terminal, terminal E3 may be open.
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.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (OPERATE SCV)

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG) and turn the tester ON.

Enter the following menus: Power train / Engine / Active Test / Control the SCV Duty Ratio.

Scroll the data list by the up or down button to display SCV ANG SENS D4 (SCV position sensor).

Check the output voltage of SCV ANG SENS D4 while the DC motor for SCV is driven from full closed to full open (or from full open to full closed) using the intelligent tester.

  • Standard:
  • The voltage output of SCV POSITION remains between 0.2 to 4.8 V while the DC motor for SCV is driven from -100 to 100 % (or from 100 to -100 %).
  • SCV DUTY RATIO
    operation    		SCV ANG SENS D4
    (Normal)    		Suspect failure area
    IACI circuit short
    VC2 circuit open
    VC2 and IACI circuit short-circuited
    IACI circuit open
    E3 circuit open
    		 Sensor malfunction
    -100 %0.2 to 1.0 VRemain less than 0.2 VRemain more than 4.8 VSensor malfunction
    100 %3.2 to 4.8 VRemain less than 0.2 VRemain more than 4.8 V
OK
Go to step 5
NG
2.CHECK HARNESS AND CONNECTOR (SCV POSITION SENSOR - ECM)
Dtc P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1). 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Disconnect the E3 and E6 ECM connectors.

Disconnect the E56 SCV position sensor connector.

Measure the resistance of the wire harness side connector.

  • Standard resistance (Check for open):
  • Tester ConnectionSpecified Condition
    VC (E3-29) - VCX (E56-1)Below 1 Ω
    IAC1 (E6-31) - VSX (E56-3)Below 1 Ω
    E2 (E3-28) - E2X (E56-2)Below 1 Ω
  • Standard resistance (Check for short):
  • Tester ConnectionSpecified Condition
    VC (E3-29) or VCX (E56-1) - Body ground10 kΩ or higher
    IAC1 (E6-31) or VSX (E56-3) - Body ground10 kΩ or higher
    E2 (E3-28) or E2X (E56-2) - Body ground10 kΩ or higher

Reconnect the SCV position sensor connector.

Reconnect the ECM connector.

NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
3.INSPECT ECM (VC2 VOLTAGE)
Dtc P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1). 4GR-FSE ENGINE CONTROL SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Disconnect the E56 SCV position sensor connector.

Turn the engine switch on (IG).

Measure the voltage of the E3 snf E6 ECM connector.

  • Standard voltage:
  • Tester ConnectionSpecified Condition
    VC (E3-29) - E2 (E3-28)4.5 to 5.0 V

Reconnect the SCV position sensor connector.

NG
REPLACE ECM
OK
4.REPLACE INTAKE MANIFOLD
NEXT
5.CHECK WHETHER DTC OUTPUT RECURS (DTC P2014, P2016 AND/OR P2017 ARE OUTPUT AGAIN)

Connect the intelligent tester to the DLC3.

Turn the engine switch on (IG) and turn the tester ON.

Clear DTCs.

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

Read DTCs.

  • Result:
  • Display (DTC Output)Proceed to
    P2014, P2016 and/or P2017 are output againA
    No outputB
B
SYSTEM IS OK
A
REPLACE ECM
LEXUS IS250, IS220d / GSE20 ALE20
4GR-FSE ENGINE CONTROL SYSTEM
Lexus IS250 IS220d GSE20 ALE20
SFI SYSTEM