Nissan Murano: Dtc/circuit Diagnosis / P0340 Cmp Sensor (phase)

DTC Description

DTC DETECTION LOGIC

1. The cylinder No. signal is not sent to ECM for the first few seconds during engine cranking.

2. The cylinder No. signal is not sent to ECM during engine running.

3. The cylinder No. signal is not in the normal pattern during engine running.

POSSIBLE CAUSE

P0340

• Harness or connectors

  • CMP sensor (PHASE) circuit is open or shorted.

  • APP sensor 2 circuit is shorted.

  • EOP sensor circuit is shorted.

  • Refrigerant pressure sensor is shorted.

• Camshaft position sensor (PHASE)

• Camshaft (INT)

• Starter motor (Refer to System Diagram.)

• Starting system circuit (Refer to System Diagram.)

• Dead (Weak) battery

• Accelerator pedal position sensor (APP sensor 2)

• Engine oil pressure sensor

• Refrigerant pressure sensor

P0345

• Harness or connectors

  • CMP sensor (PHASE) circuit is open or shorted.

  • APP sensor 2 circuit is shorted.

  • EOP sensor circuit is shorted.

  • Refrigerant pressure sensor is shorted.

• Camshaft position sensor (PHASE)

• Camshaft (INT)

• Starter motor (Refer to System Diagram.)

• Starting system circuit (Refer to System Diagram.)

• Dead (Weak) battery

• Accelerator pedal position sensor (APP sensor 2)

• Engine oil pressure sensor

• Refrigerant pressure sensor

FAIL-SAFE

Not applicable

PRECONDITIONING

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

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10.5 V with ignition switch ON.

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE-I

1. Start engine and let it idle for at least 5 seconds.

   If engine does not start, crank engine for at least 2 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to Diagnosis Procedure.

GO TO 3.

PERFORM DTC CONFIRMATION PROCEDURE-I

1. Maintaining engine speed at more than 800 rpm for at least 5 seconds.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

Proceed to Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

CHECK STARTING SYSTEM

Turn ignition switch to START position.

Does the engine turn over? Does the starter motor operate?

GO TO 2.

Check starting system. (Refer to Work Flow (Without 165-DSS-5000P) or Work Flow (With 165-DSS-5000P).)

CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY

1. Disconnect camshaft position (CMP) sensor (PHASE) harness connector.

2. Turn ignition switch ON.

3. Check the voltage between CMP sensor (PHASE) harness connector and ground.

   DTC	CMP sensor (PHASE)			−	Voltage (V)
   	Bank	Connector	+
   			Terminal
   P0340	1	F77	1	Ground	Approx. 5
   P0345	2	F60	1

Is the inspection result normal?

GO TO 4.

GO TO 3.

CHECK CMP SENSOR (PHASE) POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.

   DTC	CMP sensor (PHASE)			ECM		Continuity
   	Bank	Connector	Terminal	Connector	Terminal
   P0340	1	F77	1	F79	92	Existed
   P0345	2	F60	1

Is the inspection result normal?

Check sensor power supply 2 circuit. Refer to Diagnosis Procedure.

Repair or replace error-detected parts.

CHECK CMP SENSOR (PHASE) GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.

   DTC	CMP sensor (PHASE)			ECM		Continuity
   	Bank	Connector	Terminal	Connector	Terminal
   P0340	1	F77	2	F79	90	Existed
   P0345	2	F60	2

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

Is the inspection result normal?

GO TO 5.

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT

1. Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.

   DTC	CMP sensor (PHASE)			ECM		Continuity
   	Bank	Connector	Terminal	Connector	Terminal
   P0340	1	F77	3	F79	84	Existed
   P0345	2	F60	3		89

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

Is the inspection result normal?

GO TO 6.

Repair open circuit, short to ground or short to power in harness or connectors.

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Check camshaft position sensor (PHASE). Refer to Component Inspection.

Is the inspection result normal?

GO TO 7.

Replace malfunctioning camshaft position sensor (PHASE). Refer to Exploded View.

CHECK CAMSHAFT (INT)

Check the following.

• Accumulation of debris to the signal plate of camshaft rear end

  

• Chipping signal plate of camshaft rear end

Is the inspection result normal?

INSPECTION END

Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to Removal and Installation.

CHECK CAMSHAFT POSITION SENSOR (PHASE)-I

1. Turn ignition switch OFF.

2. Loosen the fixing bolt of the sensor.

3. Disconnect camshaft position sensor (PHASE) harness connector.

4. Remove the sensor.

5. Visually check the sensor for chipping.

   

Is the inspection result normal?

GO TO 2.

Replace malfunctioning camshaft position sensor (PHASE). Refer to Exploded View.

CHECK CAMSHAFT POSITION SENSOR (PHASE)-II

Check the resistance camshaft position sensor (PHASE) terminals as per the following.

Is the inspection result normal?

INSPECTION END

Replace malfunctioning camshaft position sensor (PHASE). Refer to Exploded View.