3Gr-Fse Engine Control System. Dtc P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1)

Engine. Lexus Gs430, Gs300. Uzs190 Grs190

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING 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. ES-368 (ECM Power Source Circuit).

Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Engine Control System.Sfi System.
Dtc
P2014 Intake Manifold Runner Position Sensor / Switch Circuit (Bank 1)

DTC No.	DTC Detection Connection	Trouble Area
P2014	SCV 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
P2016	SCV position sensor output voltage is less than 0.2 V for more than 0.5 seconds (Short)	Same as DTC No. P2014
P2017	SCV 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 Angle Sensor (D4)	Malfunction
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

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 USING 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 Angle Sensor (D4) (SCV position sensor).

Check the output voltage of SCV Angle Sensor (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 %).

HINT:
Control the SCV Duty Ratio operation	SCV Angle Sensor (D4) (Normal)	Suspect failure area
Control the SCV Duty Ratio operation	SCV Angle Sensor (D4) (Normal)	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 V	Remain less than 0.2 V	Remain more than 4.8 V	Other than the voltage in the next 2 columns on the left
100 %	3.2 to 4.8 V	Remain less than 0.2 V	Remain more than 4.8 V	Other than the voltage in the next 2 columns on the left

Go to step 5

NG

2.CHECK HARNESS AND CONNECTOR (SCV POSITION SENSOR - ECM)

Disconnect the E6 and E45 ECM connectors.

Disconnect the E63 SCV position sensor connector.

Measure the resistance.

Standard resistance (Check for open):
Tester Connection	Specified Condition
VC2 (E6-29) - VCX (E63-1)	Below 1 Ω
IACI (E45-31) - VSX (E63-3)	Below 1 Ω
E3 (E6-30) - E2X (E63-2)	Below 1 Ω

Standard resistance (Check for short):
Tester Connection	Specified Condition
VC2 (E6-29) or VCX (E63-1) - Body ground	10 kΩ or higher
IACI (E45-31) or VSX (E63-3) - Body ground	10 kΩ or higher
E3 (E6-30) or E2X (E63-2) - Body ground	10 kΩ or higher

Reconnect the SCV position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

3.INSPECT ECM (VC2 VOLTAGE)

Disconnect the E68 SCV position sensor connector.

Turn the engine switch on (IG).

Measure the voltage between the terminals of the E6 ECM connector.
Standard voltage:
Tester Connection
Specified Condition
VC2 (E6-29) - E3 (E6-30)
4.5 to 5.0 V

Reconnect the SCV position sensor connector.

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 again
A
No output
B

Result:
Display (DTC Output)	Proceed to
P2014, P2016 and/or P2017 are output again	A
No output	B

SYSTEM OK

REPLACE ECM

Tester Connection	Specified Condition
VC2 (E6-29) - E3 (E6-30)	4.5 to 5.0 V