Basic Inspection

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION START
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 leakage
  - Air cleaner clogging
  - Gasket
3. Check 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.
4. Start engine and warm it up until engine coolant temperature indicator points to the middle of gauge.
  Check that engine stays below 1, 000 RPM.
  
  Fig 1: Checking Wiring Harness For Improper Connections And Vacuum Hoses For Splits
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  Fig 2: Identifying Engine Coolant Temperature
  Courtesy of NISSAN NORTH AMERICA, INC.
5. Run engine at approximately 2, 000 RPM for approximately 2 minutes under no load.
6. Check that no DTC is displayed with CONSULT or GST.
OK or NG

OK: GO TO 3.

NG: GO TO 2.

Fig 3: Identifying Engine RPM
Courtesy of NISSAN NORTH AMERICA, INC.
REPAIR OR REPLACE
Repair or replace components as necessary according to corresponding Diagnostic Procedure.

GO TO 3.
CHECK TARGET IDLE SPEED
With CONSULT
1. Run engine at approximately 2, 000 RPM for approximately 2 minutes under no load.
2. Rev engine between 2, 000 and 3, 000 RPM 2 or 3 times under no load, then run engine at idle speed for approximately 1 minute.
3. Read idle speed in "DATA MONITOR" mode with CONSULT. Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".
650 ± 50 RPM (in P or N position)

Fig 4: Checking Target Idle Speed
Courtesy of NISSAN NORTH AMERICA, INC.

Without CONSULT
1. Run engine at approximately 2, 000 RPM for approximately 2 minutes under no load.
2. Rev engine between 2, 000 and 3, 000 RPM 2 or 3 times under no load, then run engine at idle speed for approximately 1 minute.
3. Check idle speed.
Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".

650 ± 50 RPM (in P or N position)

OK or NG

OK: GO TO 10.

NG: GO TO 4.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
GO TO 5.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".

GO TO 6.
PERFORM IDLE AIR VOLUME LEARNING
Refer to "IDLE AIR VOLUME LEARNING ".

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes: GO TO 7.

No >>
1. Follow the instructions of Idle Air Volume Learning.
2. GO TO 4.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in "DATA MONITOR" mode with CONSULT.
  Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".
  
  650 ± 50 RPM (in P or N position)
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".

650 ± 50 RPM (in P or N position)

OK or NG

OK: GO TO 10.

NG: GO TO 8.
DETECT MALFUNCTIONING PART
Check the following.
- Check camshaft position sensor (PHASE) and circuit. Refer to "DTC CONFIRMATION PROCEDURE ".
- Check crankshaft position sensor (POS) and circuit. Refer to "DTC CONFIRMATION PROCEDURE ".
OK or NG

OK: GO TO 9.

NG >>
1. Repair or replace malfunctioning part.
2. GO TO 4.
CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check ECM function. (ECM may be the cause of the incident, but this is rare.)
2. Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to "ECM RE-COMMUNICATING FUNCTION: SPECIAL REPAIR REQUIREMENT " (with intelligent key system), "ECM RE-COMMUNICATING FUNCTION: SPECIAL REPAIR REQUIREMENT " (without intelligent key system).
GO TO 4.
CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light.
Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".

15 ± 5°BTDC (in P or N position)

Fig 5: Checking Ignition Timing Using Timing Light
Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 19.

NG: GO TO 11.
PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
GO TO 12.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".

GO TO 13.
PERFORM IDLE AIR VOLUME LEARNING
Refer to "IDLE AIR VOLUME LEARNING ".

Is Idle Air Volume Learning carried out successfully?

Yes or No

Yes: GO TO 14.

No >>
1. Follow the instructions of Idle Air Volume Learning.
2. GO TO 4.
CHECK TARGET IDLE SPEED AGAIN
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in "DATA MONITOR" mode with CONSULT.
  Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".
  
  650 ± 50 RPM (in P or N position)
Without CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".

650 ± 50 RPM (in P or N position)

OK or NG

OK: GO TO 15.

NG: GO TO 17.
CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light.
Refer to "IDLE SPEED AND IGNITION TIMING CHECK ".

15 ± 5°BTDC (in P or N position)

Fig 6: Checking Ignition Timing Using Timing Light
Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG

OK: GO TO 19.

NG: GO TO 16.
CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to "REMOVAL AND INSTALLATION ".

OK or NG

OK: GO TO 17.

NG >>
1. Repair the timing chain installation. Refer to TIMING CHAIN .
2. GO TO 4.
DETECT MALFUNCTIONING PART
Check the following.
- Check camshaft position sensor (PHASE) and circuit. Refer to "DTC CONFIRMATION PROCEDURE ".
- Check crankshaft position sensor (POS) and circuit. Refer to "DTC CONFIRMATION PROCEDURE ".
OK or NG

OK: GO TO 18.

NG >>
1. Repair or replace.
2. GO TO 4.
CHECK ECM FUNCTION
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 "ECM RE-COMMUNICATING FUNCTION: SPECIAL REPAIR REQUIREMENT " (with intelligent key system), "ECM RE-COMMUNICATING FUNCTION: SPECIAL REPAIR REQUIREMENT " (without intelligent key system).
GO TO 4.
INSPECTION END
If ECM is replaced during this Basic Inspection procedure, perform "PROCEDURE AFTER REPLACING ECM ".

INSPECTION END