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 P1623-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK DTC PRIORITY
Check for DTC P0562-00, P0563-00, P2503-00 or P2504-00 being current on the CONSULT screen.

Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 3 .
CHECK DTC PRIORITY
Check for DTC U1611-00 or P1615-00 being current on the CONSULT screen.

Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 4 .
INSPECT DPF TEMPERATURE SENSOR MODULE AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect DPF temperature sensor module connector C29.
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 5 .

NO

Repair or replace error-detected parts.

CHECK BATTERY SUPPLY VOLTAGE

Turn ignition switch OFF.
Disconnect DPF temperature sensor module connector C29.
Turn ignition switch ON.

Check voltage between the terminals of the DPF temperature sensor module connector C29.

DPF temperature sensor module connector C29		Condition	Voltage (V) (Approx.)
Terminal	Terminal
3	4	Ignition switch ON	< 6 V
		Engine cranking
		Engine at idle

Is the inspection result normal?

YES

GO TO 6 .

An intermittent connection has been detected at the DPF temperature sensor module. Inspect the connector and harness for signs of intermittent shorts or opens. Repair or replace the damaged component.

CHECK BATTERY TERMINALS
Check the battery terminal connections.

Are the battery terminal connections tight and corrosion free?

YES

GO TO 7 .

NO

Tighten and clean the terminals.

CHECK BATTERY SUPPLY VOLTAGE CIRCUIT

Turn ignition switch OFF.
Turn ignition switch ON.

Check voltage between DPF temperature sensor module connector C29 and ground.

DPF temperature sensor module

Ground

Voltage (V)

(Approx.)

Connector

Terminal

C29

< 6 V

Is the inspection result normal?

YES

Repair the open or high resistance condition in the battery supply voltage circuit.

Repair the open or high resistance condition in the ground circuit.