Work Procedure

1. Check service records for any recent repairs that may indicate a related incident.
2. Check the current need for scheduled maintenance, especially for fuel filter and air cleaner filter. Refer to Inspection .
3. Open hood and check the following:
   • Harness connectors for improper connections
   • Vacuum hoses for splits, kinks, or improper connections
   • Wiring for improper connections, pinches, or cuts

     Courtesy of NISSAN NORTH AMERICA, INC.

4. Confirm that electrical or mechanical loads are not applied.
   • Headlamp switch is OFF.
   • Air conditioner switch is OFF.
   • Steering wheel is in the straight-ahead position, etc.
5. Start engine and warm it up to the normal operating temperature.

GO TO 2

Check idle speed.

For procedure, refer to Inspection .

For specification, refer to GENERAL SPECIFICATIONS .

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 3

Listen for an intake air leak after the mass air flow sensor.

Is the inspection result normal?

YES

GO TO 4

NO

Repair or replace the malfunctioning part.

1. Stop engine.
2. Bleed air from fuel system. Refer to Low-Pressure System Check .

GO TO 5

1. Start engine.
2. Check idle speed.

   For procedure, refer to Inspection .

   For specification, refer to GENERAL SPECIFICATIONS .

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 6

1. Stop engine.
2. Drain water from fuel filter. Refer to Drain .

GO TO 7

1. Start engine.
2. Check idle speed.

   For procedure, refer to Inspection .

   For specification, refer to GENERAL SPECIFICATIONS .

Is the inspection result normal?

YES

INSPECTION END

NO

GO TO 8

1. Stop engine.
2. Check air cleaner filter for clogging or breaks.

Is the inspection result normal?

YES

GO TO 9

NO

Replace air cleaner filter.

Check battery voltage.

Is the inspection result normal?

YES

GO TO 11

NO

GO TO 10

Refer to How to Handle Battery .

Is the inspection result normal?

YES

Check charging system. Refer to Work Flow (With EXP-800 NI or GR8-1200 NI) (with Cummins 5.0L) or Work Flow (Without EXP-800 NI or GR8-1200 NI) (with Cummins 5.0L) .

NO

Repair or replace the malfunctioning part.

Check compression pressure. Refer to Compression Check .

Is the inspection result normal?

YES

GO TO 12

NO

Follow the instruction of "CHECKING COMPRESSION PRESSURE".

Check idle speed.

For procedure, refer to Inspection .

For specification, refer to GENERAL SPECIFICATIONS .

Is the inspection result normal?

YES

INSPECTION END

NO

Check fuel injector. Refer to Low-Pressure System Check . And then, GO TO 2 .