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 P0201-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
INSPECT HARNESS CONNECTIONS
1. Turn ignition switch OFF.
2. Check the following connections:
  - ECM harness connector
  - Injector harness connectors
Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.
INSPECT FUEL INJECTOR CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect injector 1 harness connector F113.
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 4 .

NO

Repair or replace error-detected parts.
CHECK FOR OPEN CIRCUIT IN THE INJECTOR
1. Turn ignition switch OFF.
2. Disconnect the injector harness connector F113.
3. Measure the resistance between the injector 1 terminal 1 and 2.
Is resistance within 150k - 210k ohms?

YES

GO TO 5 .

NO

Replace the injector. Refer to Removal and Installation (CYLINDER 1 and CYLINDER 3) .
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 6 .

NO

Repair or replace error-detected parts.

CHECK FOR OPEN CIRCUIT IN THE ENGINE HARNESS

Turn ignition switch OFF.
Disconnect the injector harness connector F113.
Disconnect the ECM harness connector F101.

Measure the resistance between the injector 1 harness connector F113 terminal 2 and ECM harness connector F101 terminal 176.

Fuel injector no. 1		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
F113	2	F101	176	< 10 Ω

Is the inspection result normal?

YES

GO TO 7 .

Repair or replace the harness for a open.

CHECK FOR OPEN CIRCUIT IN THE ENGINE HARNESS

Turn ignition switch OFF.
Disconnect the injector harness connector F113.
Disconnect the ECM harness connector F101.

Measure the resistance between the injector 1 harness connector F113 terminal 1 and ECM harness connector F101 terminal 155.

Fuel injector no. 1		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
F113	1	F101	155	< 10 Ω

Is the inspection result normal?

YES

GO TO 8 .

Repair or replace the harness for a open.

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 P0201-00 DTC current?

YES

Replace ECM. Refer to Removal and Installation .

NO

Repair complete.