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Home >> Infiniti Truck >> 2013 >> JX35 FWD V6-3.5L (VQ35DE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Basic Inspection

Basic Inspection




BASIC INSPECTION

Work Procedure


1. 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.
-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.
Check that engine stays below 1,000 rpm.





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.
Are any DTCs detected?
YES- GO TO 2.
NO- GO TO 3.

2. REPAIR OR REPLACE

Repair or replace components as necessary according to corresponding Diagnostic Procedure.
- GO TO 3

3. CHECK TARGET IDLE SPEED

1.Run engine at approximately 2,000 rpm for approximately 2 minutes under no load.
Revision: March 20122013 Infiniti JX





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.
3.Check idle speed.
For procedure, refer to "Work Procedure" Idle Speed.
For specification, refer to "Idle Speed" [1][2]Idle Speed.
Is the inspection result normal?
YES- GO TO 10.
NO- GO TO 4.

4. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.Stop engine.
2.Perform "Work Procedure" Work Procedure.
- GO TO 5.

5. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform "Work Procedure" Work Procedure.
- GO TO 6.

6. PERFORM IDLE AIR VOLUME LEARNING

Perform "Work Procedure" 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.

7. CHECK IDLE SPEED AGAIN

1.Start engine and warm it up to normal operating temperature.
2.Check idle speed.
For procedure, refer to "Work Procedure" Idle Speed.
For specification, refer to "Idle Speed" [1][2]Idle Speed.
Is the inspection result normal?
YES- GO TO 10.
NO- GO TO 8.

8. DETECT MALFUNCTIONING PART

Check the Following.
- Check camshaft position sensor (PHASE) and circuit. Refer to "Diagnosis Procedure" P0340.
- Check crankshaft position sensor (POS) and circuit. Refer to "Diagnosis Procedure" P0335.
Is the inspection result normal?
YES- GO TO 9.
NO- Repair or replace malfunctioning part. Then GO TO 4.

9. 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 : Work Procedure" Work Procedure.
- GO TO 4.

10. CHECK IGNITION TIMING

1.Run engine at idle.
2.Check ignition timing with a timing light.
For procedure, refer to "Work Procedure" Testing and Inspection.
Revision: March 20122013 Infiniti JX
For specification, refer to "Ignition Timing" [1][2]Ignition Timing.
Is the inspection result normal?
YES- GO TO 19.
NO- GO TO 11.

11. PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

1.Stop engine.
2.Perform "Work Procedure" Work Procedure.
- GO TO 12.

12. PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform "Work Procedure" Work Procedure.
- GO TO 13.

13. PERFORM IDLE AIR VOLUME LEARNING

Perform "Work Procedure" 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.

14. CHECK IDLE SPEED AGAIN

1.Start engine and warm it up to normal operating temperature.
2.Check idle speed.
For procedure, refer to "Work Procedure" Idle Speed.
For specification, refer to "Idle Speed" [1][2]Idle Speed.
Is the inspection result normal?
YES- GO TO 15.
NO- GO TO 17.

15. CHECK IGNITION TIMING AGAIN

1.Run engine at idle.
2.Check ignition timing with a timing light.
For procedure, refer to "Work Procedure" Testing and Inspection.
For specification, refer to "Ignition Timing" [1][2]Ignition Timing.
Is the inspection result normal?
YES- GO TO 19.
NO- GO TO 16.

16. CHECK TIMING CHAIN INSTALLATION

Check timing chain installation. Refer to "Exploded View" Exploded View.
Is the inspection result normal?
YES- GO TO 17.
NO- Repair the timing chain installation. Then GO TO 4.

17. DETECT MALFUNCTIONING PART

Check the following.
- Check camshaft position sensor (PHASE) and circuit. Refer to "Diagnosis Procedure" P0340.
- Check crankshaft position sensor (POS) and circuit. Refer to "Diagnosis Procedure" P0335.
Is the inspection result normal?
YES- GO TO 18.
NO- Repair or replace malfunctioning part. Then GO TO 4.

18. 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.)
Revision: March 20122013 Infiniti JX
2.Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
"Work Procedure" Work Procedure.
- GO TO 4.

19. INSPECTION END

If ECM is replaced during this BASIC INSPECTION procedure, perform "Work Procedure" Work Procedure.
- INSPECTION END
Revision: March 20122013 Infiniti JX
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