Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK STARTING SYSTEM 

   Turn ignition switch to START position.

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

   YES: GO TO 2.

   NO: Check starting system. (Refer to "WORK FLOW (WITH GR8-1200 NI) " or "WORK FLOW (WITHOUT GR8-1200 NI) ".)

2. CHECK GROUND CONNECTION 
   1. Turn ignition switch OFF.
   2. Check ground connection E9. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace ground connection.

3. CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY CIRCUIT 
   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)			Ground	Voltage (V)
      	Bank	Connector	Terminal
      P0340	1	F55	1	Ground	Approx. 5
      P0345	2	F60	1

      Fig 1: Checking Voltage Between CKP Sensor Terminal 1 And Ground

      Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK CMP SENSOR (PHASE) GROUND CIRCUIT FOR OPEN AND SHORT 
   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	F55	2	F13	64	Existed
      P0345	2	F60	2		68

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

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

5. CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
   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	F55	3	F13	70	Existed
      P0345	2	F60	3		69

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

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

6. CHECK CAMSHAFT POSITION SENSOR (PHASE) 

   Refer to "COMPONENT INSPECTION ".

   Is the inspection result normal? 

   YES: GO TO 7.

   NO: Replace malfunctioning camshaft position sensor (PHASE). Refer to "REMOVAL AND INSTALLATION (UPPER OIL PAN) ".

7. 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? 

     YES: GO TO 8.

     NO: Remove debris and clean the drive plate of camshaft rear end or replace camshaft. Refer to "UNIT DISASSEMBLY AND ASSEMBLY ".

     Fig 2: Inspecting Chipping Signal Plate Of Camshaft Rear End

     Courtesy of NISSAN NORTH AMERICA, INC.
8. CHECK INTERMITTENT INCIDENT 

   Refer to "INTERMITTENT INCIDENT ".

   : INSPECTION END