Work Procedure

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:
   • 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 leaks
   • Air cleaner clogging
   • Gasket
3. Confirm that electrical or mechanical loads are not applied.
   • Headlamp switch is OFF.
   • Air conditioner switch is OFF.
   • Rear window defogger switch is OFF.
   • Steering wheel is in the straight-ahead position, etc.
     Fig 1: Identifying Improper Connections, Pinches And Cut On Wiring Harness

     Courtesy of NISSAN NORTH AMERICA, INC.
4. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.

   Ensure engine stays below 1, 000 rpm.

   Fig 2: Identifying Engine Coolant Temperature

   Courtesy of NISSAN NORTH AMERICA, INC.
5. Run engine at about 2, 000 rpm for about 2 minutes under no load.
6. Make sure that no DTC is displayed with CONSULT or GST.

   Is any DTC detected? 

   YES: GO TO 2.

   NO: GO TO  3.

   Fig 3: Identifying Engine Speed

   Courtesy of NISSAN NORTH AMERICA, INC.

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

: GO TO 3

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

   For procedure, refer to "INSPECTION ".

   For specification, refer to "IDLE SPEED ".

   Is the inspection result normal? 

   YES: GO TO  10.

   NO: GO TO 4.

   Fig 4: Checking Idle Speed

   Courtesy of NISSAN NORTH AMERICA, INC.

1. Stop engine.
2. Perform "WORK PROCEDURE ".

   : GO TO 5.

Perform "WORK PROCEDURE ".

: GO TO 6.

Perform "WORK PROCEDURE ".

Is Idle Air Volume Learning carried out successfully? 

YES: GO TO 7.

NO: Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO  4.

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

   For procedure, refer to "INSPECTION ".

   For specification, refer to "IDLE SPEED ".

   Is the inspection result normal? 

   YES: GO TO  10.

   NO: GO TO 8.

Check the Following.

• Check intake camshaft position sensor (PHASE) and circuit. Refer to "DTC LOGIC ".
• Check crankshaft position sensor (POS) and circuit. Refer to "DTC LOGIC ".

  Is the inspection result normal? 

  YES: GO TO 9.

  NO: Repair or replace. Then GO TO  4.

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
2. Perform initialization and registration of all NATS ignition key IDs. Refer to "ECM: WORK PROCEDURE " (WITH INTELLIGENT KEY SYSTEM) or "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: SPECIAL REPAIR REQUIREMENT " (WITHOUT INTELLIGENT KEY SYSTEM).

   : GO TO  4.

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

   For procedure, refer to "INSPECTION ".

   For specification, refer to "IGNITION TIMING ".

   • Timing indicator (1)

   Is the inspection result normal? 

   YES: GO TO  19.

   NO: GO TO 11.

   Fig 5: Identifying Timing Indicator

   Courtesy of NISSAN NORTH AMERICA, INC.

1. Stop engine.
2. Perform "WORK PROCEDURE ".

   : GO TO 12.

Perform "WORK PROCEDURE ".

: GO TO 13.

Perform "WORK PROCEDURE ".

Is idle air volume learning carried out successfully? 

YES: GO TO 14.

NO: Follow the instruction of IDLE AIR VOLUME LEARNING. Then GO TO  4.

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

   For procedure, refer to "INSPECTION ".

   For specification, refer to "IDLE SPEED ".

   Is the inspection result normal? 

   YES: GO TO 15.

   NO: GO TO  17.

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

   For procedure, refer to "INSPECTION ".

   For specification, refer to "IGNITION TIMING ".

   • Timing indicator (1)

   Is the inspection result normal? 

   YES: GO TO  19.

   NO: GO TO 16.

   Fig 6: Identifying Timing Indicator

   Courtesy of NISSAN NORTH AMERICA, INC.

Check timing chain installation. Refer to "REMOVAL AND INSTALLATION ".

Is the inspection result normal? 

YES: GO TO 17.

NO: Repair the timing chain installation. Then GO TO  4.

Check the following.

• Check intake camshaft position sensor (PHASE) and circuit. Refer to "DTC LOGIC ".
• Check crankshaft position sensor (POS) and circuit. Refer to "DTC LOGIC ".

  Is the inspection result normal? 

  YES: GO TO 18.

  NO: Repair or replace. Then GO TO  4.

1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but this is a rare case.)
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to "ECM: WORK PROCEDURE " (WITH INTELLIGENT KEY SYSTEM) or "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: SPECIAL REPAIR REQUIREMENT " (WITHOUT INTELLIGENT KEY SYSTEM).

   : GO TO  4.

If ECM is replaced during this BASIC INSPECTION procedure, perform "WORK PROCEDURE ".

: INSPECTION END