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. Start the engine and let idle for 1 minute.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Are any of the following displayed as current or have accumulated past counts on the CONSULT screen:
  - Any fuel system, injector or rail pressure sensor DTCs
  - Any turbocharger, crankcase or EGR related DTCs
  - P0335-00
  - P0340-00
  - P0344-00
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Check for DTC P0149-00 being current on the CONSULT screen.
Is DTC P0149-00 detected as current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .
PERFORM CYLINDER CUTOUT TEST
1. Turn ignition switch ON.
2. Operate the engine under the conditions in which the complaint occurs.
3. Connect CONSULT and perform the Cylinder Cutout Test to disable individual injectors. Refer to Work Procedure .
Is the symptom attributed to injectors?

YES

Replace malfunctioning injectors. Refer to Exploded View .

NO

GO TO 4 .
PERFORM HIGH-PRESSURE FUEL INJECTOR DRAIN FLOW TEST
1. Turn ignition switch ON.
2. Perform the Fuel Injector Drain Flow Test on each bank.
Injectors meet specifications?

YES

GO TO 5.

NO

Replace malfunctioning injectors. Refer to Exploded View .
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to Compression Check .

Is the inspection result normal?

YES

Refer to Engine Runs Rough or Misfires troubleshooting symptom. Refer to Symptom Table .

NO

Follow the instruction of "CHECK COMPRESSION PRESSURE". Refer to Compression Check .