Nissan GT-R (R35) · Service Manual ENGINE

P0340, P0345 CMP SENSOR (PHASE)

VR38

P0340 P0345

Description


The camshaft position sensor (PHASE) senses the retraction of camshaft (INT) to identify a particular cylinder. The camshaft position sensor (PHASE) senses the piston position.

JMBIA0064ZZ.JPG
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor (PHASE) provides various controls of engine parts instead, utilizing timing of cylinder identification signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to change.
Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.

JMBIA0001GB.JPG

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
 If DTC P0340 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to DTC Logic (GT-R certified NISSAN dealer).

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
P0340
 		Camshaft position sensor (PHASE) (bank 1) circuit
  • The cylinder No. signal is not sent to ECM for the first few seconds during engine cranking.
  • The cylinder No. signal is not sent to ECM during engine running.
  • The cylinder No. signal is not in the normal pattern during engine running.
  • Harness or connectors
    [CMP sensor (PHASE) (bank 1) circuit is open or shorted.]
  • Camshaft position sensor (PHASE) (bank 1)
  • Camshaft (INT)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery
P0345
 		Camshaft position sensor (PHASE) (bank 2) circuit
  • Harness or connectors
    [CMP sensor (PHASE) (bank 2) circuit is open or shorted.]
    [CKP sensor (POS) circuit is shorted.]
    [Power steering pressure sensor circuit is shorted.]
    (Manifolde absolute pressure sensor circuit is shorted.)
    (APP sensor 2 circuit is shorted.)
    (Refrigerant pressure sensor circuit is shorted.)
  • Camshaft position sensor (PHASE) (bank 2)
  • Crankshaft position sensor (POS)
  • Power steering pressure sensor
  • Manifolde absolute pressure sensor
  • Accelerator pedal position sensor
  • Refrigerant pressure sensor
  • Camshaft (INT)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery

 
 DTC CONFIRMATION PROCEDURE

 
 1.PRECONDITIONING
 
 2.PERFORM DTC CONFIRMATION PROCEDURE-I
 
 3.PERFORM DTC CONFIRMATION PROCEDURE-I

Diagnosis Procedure


 
 1.CHECK STARTING SYSTEM
 
 2.CHECK GROUND CONNECTION
 
 3.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT-I
 
 4.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT-II
 
 5.CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT-III
 
 6.CHECK COMPONENTS
 
 7.CHECK APP SENSOR
 
 8.REPLACE ACCELERATOR PEDAL ASSEMBLY
 
 9.CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT
 
 10.CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
 
 11.CHECK CAMSHAFT POSITION SENSOR (PHASE)
 
 12.CHECK CAMSHAFT (INT)
 
 13.CHECK INTERMITTENT INCIDENT

Component Inspection


 
 1.CHECK CAMSHAFT POSITION SENSOR (PHASE)-I
 
 2.CHECK CAMSHAFT POSITION SENSOR (PHASE)-II