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. Check for DTC P0264-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
INSPECT FUEL INJECTOR CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect injector 2 harness connector F129.
3. Inspect the harness and connector pins for the following:
  - Loose connector
  - Corroded pins
  - Bent or broken pins
  - Pushed back or expanded pins
  - Moisture in or on the connector
  - Missing or damaged connector seals
  - Dirt or debris on or in the connector pins
  - Connector shell broken
  - Wire insulation damage
  - Damaged connector locking tab
Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.
CHECK FOR SHORT CIRCUIT IN THE INJECTOR
- Measure the resistance between the injector 2 terminal 1 and 2.
Is resistance less than 150K ohms?

YES

Replace the injector. Refer to Removal and Installation (CYLINDER 2 and CYLINDER 4) .

NO

GO TO 4 .
INSPECT ECM AND HARNESS CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector F101.
3. Inspect the ECM connector pins for the following:
  - Loose connector
  - Corroded pins
  - Bent or broken pins
  - Pushed back or expanded pins
  - Moisture in or on the connector
  - Missing or damaged connector seals
  - Dirt or debris on or in the connector pins
  - Connector shell broken
  - Wire insulation damage
  - Damaged connector locking tab
Is the inspection result normal?

YES

GO TO 5 .

NO

Repair or replace error-detected parts.

CHECK FOR SHORT CIRCUIT IN THE ENGINE HARNESS

Measure the resistance between ECM harness connector F101 terminal 92 and all other F101 terminals.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
F101	92	F101	All	> 100k Ω

Is resistance greater than 100k ohms?

YES

GO TO 6 .

Repair or replace the engine harness for a short.

CHECK FOR SHORT CIRCUIT IN THE ENGINE HARNESS

Measure the resistance between ECM harness connector F101 terminal 133 and all other F101 terminals.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
F101	113	F101	All	> 100k Ω

Is resistance greater than 100k ohms?

YES

GO TO 7 .

Repair or replace harness for a short.

CHECK FOR PAST DTC
1. Connect all components.
2. Turn ignition switch ON and wait 30 seconds.
3. Connect CONSULT and check for past ENGINE diagnostic trouble codes.
Is P0264-00 DTC past?

YES

GO TO 8 .

NO

Replace the injector. Refer to Removal and Installation (CYLINDER 2 and CYLINDER 4) .
ERASE DTC
1. Using CONSULT erase ENGINE diagnostic trouble codes.
2. Perform DTC CONFIRMATION PROCEDURE.
Is P0264-00 DTC current?

YES

Return to the Diagnosis Procedure. Refer to DTC Description .

NO

Repair complete.