Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Are any of the following displayed on the CONSULT screen:
  - Any injector or rail pressure sensor DTCs current or with accumulated past counts.
  - Any turbocharger, intake air throttle or EGR DTCs
  - P0300-00
  - P0301-00
  - P0335-00
  - P0340-00
  - P0344-00
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK INJECTOR TRIM CODE.
1. Turn ignition switch ON.
2. Using CONSULT, verify injector trim codes.
  NOTE: The factory installed injector bar code values can be found in website Online by entering the correct engine serial number (ESN), selecting Service, and then Engine Data Plate. The correct injector bar code values for that ESN are contained in the engine data plate section. If the engine has had a previous repair involving the replacement of injectors, the injector bar code values can be read directly off the top of each injector without the need of removing any additional parts.
Injector trim code missing or incorrect?

YES

Using CONSULT correctly enter the injector bar code parameters into the ECM.

NO

GO TO 3 .
PERFORM THE HIGH PRESSURE FUEL INJECTOR DRAIN FLOW TEST
1. Turn ignition switch ON.
2. Perform the Fuel Injector Drain Flow Test on the bank of cylinder number 6.
Injectors meet specifications?

YES

GO TO 4 .

NO

Replace malfunctioning fuel injector. Refer to Removal and Installation (CYLINDER 6 and CYLINDER 8) .
ERASE DTC
1. Connect all components.
2. Turn ignition switch ON.
3. Using CONSULT erase ENGINE diagnostic trouble codes.
4. Perform DTC CONFIRMATION PROCEDURE.
Is P0278-00 DTC current?

YES

Return to the diagnosis procedure steps if all steps have been completed and checked again.

NO

Repair complete.