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 do they have high past counts on the CONSULT screen:
  - P008A-00
  - P0252 - 00
  - P0253 - 00
  - P0254 - 00
  - P2541 - 00
  - P2542 - 00
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK FOR CURRENT DTC
Check for DTC P2540 - 00 being current on the CONSULT screen.

Is applicable DTC current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .
MONITOR THE FUEL PRESSURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect the lift pump (Stage 1 fuel pump).
3. Turn ignition switch ON and wait 30 seconds.
4. Using CONSULT, select "ENGINE" and check the "FUEL SPLY PRESS" and "TURBO COMP INLET PRESS".
Is the fuel pressure sensor reading within ±0.5 bar of the compressor intake pressure?

YES

GO TO 4 .

NO
- Replace the fuel pressure sensor. Refer to Removal and Installation .
- GO TO 10 .
INSPECT FUEL PRESSURE SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect the fuel pressure sensor.
3. Inspect the harness connector 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.
- GO TO 10 .
CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch ON.
2. Wait 30 seconds.
3. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.
Is DTC P2541 - 00 current?

YES

GO TO 6 .

NO

GO TO 7 .
CHECK THE CIRCUIT RESPONSE
1. Connect a jumper wire between the fuel pressure sensor SIGNAL terminal 3 and POWER terminal 1 of the fuel pressure sensor connector F197.
2. Wait 30 seconds.
3. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.
Is DTC P2542 - 00 current?

YES
- Replace the fuel pressure sensor. Refer to Removal and Installation .
- GO TO 10 .
NO

GO TO 7 .
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 8 .

NO
- Repair or replace error-detected parts.
- GO TO 10 .
CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch ON.
2. Wait 30 seconds.
3. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.
Is DTC P2541 - 00 current?

YES

GO TO 9 .

NO
- Replace the ECM. Refer to Removal and Installation .
- GO TO 10 .
CHECK THE ECM RESPONSE
CAUTION:
When probing or jumping between connector pins or terminals:
- Always use extreme care or connector damage could result. Do not bend or damage connector pins and terminals. Damaged connectors, pins or terminals could result in additional issues or difficult-to-diagnose intermittent incidents.
- Do not probe or short unintended circuits or component and/or control module damage could result.
1. Connect a jumper wire between ECM pins 127 and 130 at the ECM.
2. Wait for 30 seconds.
3. With CONSULT, check for current "ENGINE" diagnostic trouble codes.
Is P2542 - 00 DTC current?

YES
- High resistance or short circuit has been detected in the engine harness. Repair or replace the engine harness.
- GO TO 10 .
NO
- Replace the ECM. Refer to Removal and Installation .
- GO TO 10 .
CHECK FOR CURRENT DTC
1. Turn ignition switch OFF.
2. Disconnect the jumper wire.
3. Connect all harness connectors.
4. Turn ignition switch ON.
5. Using CONSULT, erase "ENGINE" diagnostic trouble codes.
6. Operate the engine within the "Conditions for clearing the DTC".
7. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
Is P2540 - 00 DTC current?

YES

Troubleshooting procedure need to be repeated. Go to DTC Description .

NO

The removal and installation of the connector corrected the issue. Repair complete.