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 P0181-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Check for DTC P0182-00, P0183-00, P1191-00, P1192-00 or P1193-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 3 .

CHECK FUEL TEMPERATURE SENSOR

Turn ignition switch OFF.
Disconnect fuel temperature sensor connector F128.

Check resistance between the terminals of the fuel temperature sensor at room temperature (25°C [77°F]).

Fuel temperature sensor		Resistance
Terminal	Terminal	Resistance
1	2	9k - 11k Ω

Is the inspection result normal?

YES

GO TO 4 .

Replace the fuel temperature sensor. Refer to Removal and Installation .

INSPECT FUEL TEMPERATURE SENSOR AND CONNECTOR PINS
Inspect the harness and sensor 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 DTC PRIORITY
1. Fuel temperature sensor connector F128 remains disconnected.
2. Turn ignition switch ON.
3. Check for DTC P0183-00 being current on the CONSULT screen after 30 seconds.
Is applicable DTC detected?

YES

GO TO 6 .

NO

GO TO 7 .
CHECK DTC PRIORITY
1. Fuel temperature sensor connector F128 remains disconnected.
2. Connect a jumper wire between terminals 1 and 2 of the fuel temperature sensor connector F128.
3. Turn ignition switch ON.
4. Check for DTC P0182-00 being current on the CONSULT screen after 30 seconds.
Is applicable DTC detected?

YES

Replace the fuel temperature sensor. Refer to Removal and Installation .

NO

GO TO 7 .
INSPECT ECM AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect ECM connector F101.
3. Inspect the harness and module 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.
CHECK DTC PRIORITY
1. ECM connector F101 remains disconnected.
2. Turn ignition switch ON.
3. Check for DTC P0183-00 being current on the CONSULT screen after 30 seconds.
Is applicable DTC detected?

YES

GO TO 9 .

NO

Replace the ECM. Refer to Removal and Installation .
CHECK DTC PRIORITY
1. ECM connector F101 remains disconnected.
2. Connect a jumper wire between terminals 170 and 174 of the ECM connector F101.
3. Turn ignition switch ON.
4. Check for DTC P0182-00 being current on the CONSULT screen after 30 seconds.
Is applicable DTC detected?

YES

High resistance or a short circuit has been detected in the engine harness. Repair or replace the engine harness.

NO

Replace the ECM. Refer to Removal and Installation .