Dtc Description

DTC Description

DTC DETECTION LOGIC

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
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. Note: ECM does not control the accelerator pedal releasing speed.
	Engine output control 1	ECM reduces the engine output, according to the rise in engine speed. This reduces the Nissan Sentra vehicle speed to encourage the driver to repair malfunction. Driving at 70 km/h (44 MPH) or more is possible. Note: This value is a reference value converted from engine power to Nissan Sentra vehicle speed. Actual power limitation value differs due to the malfunctioning part and driving condition.
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).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

Idle Start/Stop System

Not applicable

Confirmation Procedure

Confirmation Procedure

1. 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.

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.

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 Diagnosis Procedure.

   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

1. 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.

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

   1. Turn ignition switch OFF.

   2. Disconnect intake valve manifold runner control valve position sensor harness connector.

   3. Turn ignition switch ON.

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

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

   Is the inspection result normal?

   YES >>

   GO TO 7.

   NO >>

   GO TO 3.

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.)
   Intake manifold runner control valve position sensor
   Connector	Terminal
   F29	1	Ground	5 V

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   GO TO 4.

4. CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR POWER SUPPLY CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. 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
      F29	1	F25	83	Existed

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace malfunctioning part.

5. CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR GROUND CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. 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
      F29	3	F25	79	Existed

   4. 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.

6. CHECK ECM GROUND CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between ECM harness connector and ground.

      ECM		—	Continuity
      Connector	Terminal
      F24	5	Ground	Existed
      	65
      F25	69
      E16	157
      	159
      	162

   4. Also check harness for short to power.

   Is the inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace error-detected parts.

7. CHECK INTAKE MANIFOLD RUNNER CONTROL VALVE POSITION SENSOR INPUT SIGNAL CIRCUIT

   1. 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
      F29	2	F25	82	Existed

   2. 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.