Diagnostic Test

1. Check service records for any recent repairs that may indicate a related malfunction, or a current need for scheduled maintenance.
2. Open engine hood and check the following:

   Courtesy of NISSAN NORTH AMERICA, INC.

   • Harness connectors for improper connections
   • Wiring harness for improper connections, pinches and cut
   • Vacuum hoses for splits, kinks and improper connections
   • Hoses and ducts for leakage
   • Air cleaner clogging
   • Gasket
3. Check that electrical or mechanical loads are not applied.
   • Head lamp switch is OFF.
   • Air conditioner switch is OFF.
   • Rear window defogger switch is OFF.
   • Steering wheel is in the straight-ahead position, etc.
4. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

   Courtesy of NISSAN NORTH AMERICA, INC.

   Check that engine stays below 1, 000 rpm.

5. Run engine at approximately 2, 000 rpm for approximately 2 minutes under no load.

   Courtesy of NISSAN NORTH AMERICA, INC.

6. Check that no DTC is displayed with CONSULT or GST.

Are any DTCs detected?

YES 

GO TO STEP 2  .

NO 

GO TO STEP 3  .

Repair or replace components as necessary according to corresponding Diagnostic Procedure.

GO TO STEP 3 

1. Run engine at approximately 2, 000 rpm for approximately 2 minutes under no load.
2. Rev engine (2, 000 to 3, 000 rpm) 2 or 3 times under no load, then run engine at idle speed for approximately 1 minute.

   Courtesy of NISSAN NORTH AMERICA, INC.

3. Check idle speed.

   For procedure, refer to WORK PROCEDURE .

   For specification, refer to IDLE SPEED .

Is the inspection result normal?

YES 

GO TO STEP  10.

NO 

GO TO STEP 4  .

1. Stop engine.
2. Perform Accelerator Pedal Position Learning. Refer to DESCRIPTION .

GO TO STEP 5  .

Perform Throttle Valve Closed Position Learning. Refer to DESCRIPTION .

GO TO STEP 6  .

Perform Idle Air Volume Learning. Refer to DESCRIPTION .

Is Idle Air Volume Learning carried out successfully?

YES 

GO TO STEP 7  .

NO 

Follow the instruction of Idle Air Volume Learning. Then GO TO STEP  4.

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   For procedure, refer to WORK PROCEDURE .

   For specification, refer to IDLE SPEED .

Is the inspection result normal?

YES 

GO TO STEP 10  .

NO 

GO TO STEP 8  .

Check the Following.

• Check camshaft position sensor (PHASE) and circuit. Refer to DIAGNOSIS PROCEDURE .
• Check crankshaft position sensor (POS) and circuit. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES 

GO TO STEP 9  .

NO 

Repair or replace malfunctioning part. Then GO TO STEP  4.

1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to DESCRIPTION .

GO TO STEP  4.

1. Run engine at idle.
2. Check ignition timing with a timing light.

   For procedure, refer to WORK PROCEDURE .

   For specification, refer to IGNITION TIMING .

Is the inspection result normal?

YES 

GO TO STEP  19.

NO 

GO TO STEP 11  .

1. Stop engine.
2. Perform Accelerator Pedal Position Learning. Refer to DESCRIPTION .

GO TO STEP 12  .

Perform Throttle Valve Closed Position Learning. Refer to DESCRIPTION .

GO TO STEP 13  .

Perform Idle Air Volume Learning. Refer to DESCRIPTION .

Is Idle Air Volume Learning carried out successfully?

YES 

GO TO STEP 14  .

NO 

Follow the instruction of Idle Air Volume Learning. Then GO TO STEP  4.

1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.

   For procedure, refer to WORK PROCEDURE .

   For specification, refer to IDLE SPEED .

Is the inspection result normal?

YES 

GO TO STEP 15  .

NO 

GO TO STEP 17  .

1. Run engine at idle.
2. Check ignition timing with a timing light.

   For procedure, refer to WORK PROCEDURE .

   For specification, refer to IGNITION TIMING .

Is the inspection result normal?

YES 

GO TO STEP  19.

NO 

GO TO STEP 16  .

Check timing chain installation. Refer to EXPLODED VIEW WITH TORQUE SPECIFICATIONS .

Is the inspection result normal?

YES 

GO TO STEP 17  .

NO 

Repair the timing chain installation. Then GO TO STEP  4.

Check the following.

• Check camshaft position sensor (PHASE) and circuit. Refer to DIAGNOSIS PROCEDURE .
• Check crankshaft position sensor (POS) and circuit. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES 

GO TO STEP 18  .

NO 

Repair or replace malfunctioning part. Then GO TO STEP  4.

1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, although this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to DESCRIPTION .

GO TO STEP 4  .

If ECM is replaced during this BASIC INSPECTION procedure, perform DESCRIPTION .

INSPECTION END