Nissan Sentra B18 (2020-2025) Service Manual: P0190 Frp Sensor

Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors

  • Fuel rail pressure sensor circuit is open or shorted.

  • Sensor power supply 2 is shorted.

• Fuel rail pressure sensor

• Each sensor, connected with sensor power supply 2 circuit

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.
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 speed control	Stops feedback control of idle speed and controls with specified speed.
	Recovery speed control at decelerating	Stops recovery speed control by the fuel cut at decelerating and controls with specified speed.
	Idle neutral control	Stops idle neutral control.

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

1. CHECK DTC PRIORITY

   If DTC P0193 is displayed with DTC P0088 or P0090, first perform the trouble diagnosis for DTC P0088 or P0090.

   Is other DTC detected?

   YES >>

   Perform diagnosis of applicable.

   • DTC P0088: Refer to DTC Description.

   • DTC P0090: Refer to DTC Description.

   NO >>

   GO TO 2.

2. PRECONDITIONING

   If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

   TESTING CONDITION:

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

   >>

   GO TO 3.

3. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start engine and let it idle for at least 1 minute.

   2. Check DTC or 1st trip DTC.

   Is DTC or 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

1. CHECK FRP SENSOR POWER SUPPLY-1

   1. Turn ignition switch OFF.

   2. Disconnect FRP sensor harness connector.

   3. Turn ignition switch ON.

   4. Check the voltage between FRP sensor harness connector terminals.

      FRP sensor			Voltage
      Connector	+	−
      	Terminal
      F101	1	3	Approx. 5 V

   Is inspection result normal?

   YES >>

   GO TO 7.

   NO >>

   GO TO 2.

2. CHECK FRP SENSOR POWER SUPPLY-2

   Check the voltage between FRP sensor harness connector and ground.

   +		Ground	Voltage
   FRP sensor
   Connector	Terminal
   F101	1	Ground	Approx. 5 V

   Is inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   GO TO 3.

3. CHECK FRP SENSOR POWER SUPPLY CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between FRP sensor harness connector and ECM harness connector.

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	1	F24	43	Existed

   Is inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Repair or replace malfunctioning part.

4. CHECK SENSOR POWER SUPPLY 2

   Refer to Diagnosis Procedure.

   Is inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Replace malfunctioning part.

5. CHECK FRP SENSOR GROUND CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector

   3. Check the continuity between FRP sensor harness connector and ECM harness connector.

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	3	F24	45	Existed

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

   Is inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   Repair or replace malfunctioning part.

6. CHECK ECM GROUND CIRCUIT

   Check the continuity between ECM harness connector and the ground.

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

   Is inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace malfunctioning part.

7. CHECK FRP SENSOR SIGNAL CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between FRP sensor harness connector and ECM harness connector.

      FRP sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      F101	2	F24	44	Existed

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

   Is inspection result normal?

   YES >>

   GO TO 8.

   NO >>

   Repair or replace malfunctioning part.

8. CHECK FRP SENSOR

   Refer to Component Inspection.

   Is inspection result normal?

   YES >>

   INSPECTION END

   NO >>

   Repair or replace malfunctioning part.

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