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 FOR CURRENT DTC
1. Turn ignition switch ON.
2. Connect CONSULT and check "ENGINE" diagnostic trouble codes for DTC P208C-00 being current.
Is applicable DTC current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
INSPECT DEF SUPPLY PUMP ASSEMBLY AND ELECTRICAL CONNECTIONS
1. Turn ignition switch OFF.
2. Disconnect the DEF supply pump assembly connector.
3. Inspect 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 3 .

NO

Repair or replace error-detected parts.
INSPECT DEF CONTROL MODULE AND ELECTRICAL CONNECTIONS
1. Turn ignition switch OFF.
2. Disconnect the DEF control module.
3. Inspect both connectors 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 DEF SUPPLY PUMP MOTOR A SUPPLY CIRCUIT FOR SHORT TO GROUND

Check for continuity between the pump motor A supply circuit and ground at the DEF control module harness connector.

DEF control module		Ground	Continuity
Connector	Terminal
C205	19	-	No

Is the inspection result normal?

YES

GO TO 5 .

Repair short circuit in harness or connectors.

CHECK DEF SUPPLY PUMP MOTOR B SUPPLY CIRCUIT FOR SHORT TO GROUND

Check for continuity between the pump motor B supply circuit and ground at the DEF control module harness connector.

DEF control module		Ground	Continuity
Connector	Terminal
C205	18	-	No

Is the inspection result normal?

YES

GO TO 6 .

Repair short circuit in harness or connectors.

CHECK DEF SUPPLY PUMP MOTOR C SUPPLY CIRCUIT FOR SHORT TO GROUND

Check for continuity between the pump motor C supply circuit and ground at the DEF control module harness connector.

DEF control module		Ground	Continuity
Connector	Terminal
C205	17	-	No

Is the inspection result normal?

YES

GO TO 7 .

Repair short circuit in harness or connectors.

CHECK FOR CURRENT DTC
1. Connect DEF control module.
2. Turn ignition switch ON.
3. Wait 30 seconds.
4. Using CONSULT check for "ENGINE" diagnostic trouble codes.
  NOTE: Other DTCs will be set.
Is P208A-00 DTC current and P208C-00 DTC past?

YES
- Replace the DEF supply pump assembly. Refer to Removal and Installation .
- GO TO 8 .
NO
- Replace the DEF control module. Refer to Removal and Installation .
- GO TO 8 .
ERASE CURRENT DTC
1. Turn ignition switch OFF.
2. Connect all harness connectors.
3. Turn ignition switch ON.
4. Using CONSULT, erase "ENGINE" diagnostic trouble codes.
5. Operate the engine within the "Conditions for setting the DTC".
6. Check for "ENGINE" diagnostic trouble codes.
Is P208C-00 DTC current?

YES

Return to Diagnosis Procedure. Refer to DTC Description .

NO

Repair complete.