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 as current or have high past counts on the CONSULT screen:
  - P008A-00
  - P009C-00
  - P009D-00
  - P0192-00
  - P0193-00
  - P0252-00
  - P0253-00
  - P0254-00
  - P2540-00
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
INSPECT FUEL RAIL PRESSURE SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect fuel rail pressure sensor harness connector F139.
3. Inspect the harness connector and fuel rail pressure sensor 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 THE CIRCUIT RESPONSE
1. Turn ignition switch ON and wait 30 seconds.
2. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did P0193-00 DTC become current?

YES

Replace fuel rail pressure sensor. Refer to Removal and Installation .

NO

GO TO 4 .
CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Connect a jumper wire between fuel rail pressure sensor signal circuit and return circuit at the sensor harness connector F139.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did P0192-00 DTC become current?

YES
- Replace fuel rail pressure sensor. Refer to Removal and Installation .
- GO TO 7 .
NO

GO TO 5 .
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 THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector F101.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did P0193-00 DTC become current?

YES

GO TO 7 .

NO

Replace ECM. Refer to Removal and Installation .
CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Connect a jumper wire between ECM harness connector F101 terminals 128 and 171.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did P0192-00 DTC become current?

YES

Repair or replace harness for an open circuit.

NO

Replace ECM. Refer to Removal and Installation .