Nissan Sentra B18 (2020-2025) Service Manual: P2018 Intake Manifold Runner Control Valve Position Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P2018 Intake Manifold Runner Control Valve Position Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P2018	IN/MANIFOLD RUNNER POS SEN B1 (Intake manifold runner position sensor/switch circuit intermittent bank 1)	Diagnosis condition	Engine running at idle
		Signal (terminal)	Intake manifold runner control valve position sensor
		Threshold	An excessively high voltage from the sensor is sent to ECM
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (Intake manifold runner control position sensor circuit is shorted.)
Intake manifold runner control position sensor

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Device fix mode		This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).

Idle Start/Stop System

Not applicable

Confirmation Procedure

Confirmation Procedure

CHECK DTC PRIORITY

If DTC P2014, P2016, P2017 or P2018 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?
YES >>
Perform diagnosis of applicable. Refer to DTC Description.
NO >>
GO TO 2.
PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>>
GO TO 3.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine and let it idle for 10 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Proceed to DTC Description.
NO-1 >>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>
Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P2014, P2016, P2017 or P2018 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?
YES >>
Perform diagnosis of applicable. Refer to DTC Description.
NO >>
GO TO 2.

CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR POWER SUPPLY-1

Turn ignition switch OFF.
Disconnect intake valve manifold runner control valve position sensor harness connector.
Turn ignition switch ON.

Check the voltage between intake valve manifold runner control valve position sensor harness connector.

Intake manifold runner control valve position sensor	Voltage (Approx.)
F29	1	3	5 V

Intake manifold runner control valve position sensor

Voltage

(Approx.)

Connector

−

Terminal

F29

5 V

Is the inspection result normal?

YES >>

GO TO 7.

NO >>

GO TO 3.

CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR POWER SUPPLY-2

Check the voltage between intake valve manifold runner control valve position sensor harness connector and ground.

+	−	Voltage (Approx.)
F29	1	Ground	5 V

−

Voltage

(Approx.)

Intake manifold runner control valve position sensor

Connector

Terminal

F29

Ground

5 V

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

GO TO 4.

CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between intake valve manifold runner control valve position sensor harness connector and ECM harness connector.

Intake manifold runner control valve position sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F29	1	F25	83	Existed

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Repair or replace malfunctioning part.

CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between intake valve manifold runner control valve position sensor harness connector and ECM harness connector.

Intake manifold runner control valve position sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F29	3	F25	79	Existed

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

Repair or replace malfunctioning part.

CHECK ECM GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

Check the continuity between ECM harness connector and ground.

ECM		—	Continuity
Connector	Terminal	—	Continuity
F24	5	Ground	Existed
F24	65
F52	69
E16	157
	159
	162

Also check harness for short to power.

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Repair or replace error-detected parts.

CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT

Check the continuity between intake manifold runner control valve position sensor harness connector and ECM harness connector.

Intake manifold runner control valve position sensor		ECM		Continuity
Connector	Terminal	Connector	Terminal	Continuity
F29	2	F25	82	Existed

Also check harness for short to ground and to power.

Is the inspection result normal?

YES >>

Replace intake manifold. Refer to Removal and Installation.

NO >>

Repair or replace error-detected parts.

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