DTC Diagnosis Procedure

If DTC P0340 is displayed with DTC P0643, first perform the confirmation procedure (trouble diagnosis) for DTC P0643.

Is DTC P0643 detected?

YES

Perform diagnosis of applicable. Refer to DTC Description .

NO

GO TO 2.

Turn ignition switch to START position.

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

YES

GO TO 3.

NO

Check starting system. (Refer to Diagnosis Procedure .orRefer to Diagnosis Procedure . For details, Refer to SPECIAL SERVICE TOOL : Preparation .)

1. Turn ignition switch OFF.
2. Check ground connection E191. Refer to Ground Inspection in Refer to Inspection .

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace ground connection.

1. Disconnect intake camshaft position sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between intake camshaft position sensor harness connector and ground.

   +			-	Voltage (Approx.)
   Intake camshaft position sensor
   Bank	Connector	Terminal
   1	F135	1	Ground	5 V

Is the inspection result normal?

YES

GO TO 6.

NO

GO TO 5.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

   Intake camshaft position sensor			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F135	1	F143	40	Existed

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

Is the inspection result normal?

YES

Perform the trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .

NO

Repair or replace error-detected parts.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

   Intake camshaft position sensor			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F135	2	F143	27	Existed

4. Also check harness for short to power.

Is the inspection result normal?

YES

GO TO 7.

NO

Repair or replace error-detected parts.

1. Check the continuity between intake camshaft position sensor harness connector and ECM harness connector.

   Intake camshaft position sensor			ECM		Continuity
   Bank	Connector	Terminal	Connector	Terminal
   1	F135	3	F143	36	Existed

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

Is the inspection result normal?

YES

GO TO 8.

NO

Repair or replace error-detected parts.

Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 9.

NO

Replace malfunctioning intake camshaft position sensor. Refer to CAMSHAFT : Exploded View .

Check the following.

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

  Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

INSPECTION END

NO

Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to CAMSHAFT : Exploded View .