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 A CURRENT DTC
CAUTION: To prevent damage to the rotary turbine control valve actuator, be sure to drain the coolant before removing the actuator.
1. Turn ignition switch ON.
2. Connect CONSULT and check for current and past "ENGINE" diagnostic trouble codes.
3. Check for DTC P003A-00 "current" or "past" on the CONSULT screen.
Is applicable DTC current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK FOR OTHER RELATED DIAGNOSTIC TROUBLE CODES
Using CONSULT, check for the following "ENGINE" diagnostic trouble codes:
- U010C-00
- U040D-00
- P0046-00
- P0047--00
- P004E-00
- P00AF-00
- P1A62-00
- P2262-00
- P226C-00
- P22CB-00
- P22CC-00
- P22CD-00
- P22CE-00
Are any of the above DTCs detected as current or past?

YES

Perform diagnosis of applicable DTC. Refer to DTC Index .

NO

GO TO 3 .
INSPECT THE ROTARY TURBINE CONTROL VALVE ACTUATOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect the rotary turbine control valve actuator.
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 4 .

NO
- Repair or replace error-detected parts.
- GO TO 8 .
RUN ROTARY TURBINE CONTROL VALVE ACTUATOR HYSTERESIS TEST
1. Turn ignition switch OFF.
2. Reconnect the rotary turbine control valve actuator.
3. Turn ignition switch ON.
4. Using CONSULT, select ENGINE and perform the "RTCV Hysteresis Test" under "Active Test".
Did RTCV Hysteresis Test pass?

YES

GO TO 5 .

NO
- Replace the rotary turbine control valve actuator. Refer to Removal and Installation .
- GO TO 8 .
CHECK THE TURBOCHARGER TURBINE ACTUATOR LINKAGE
CAUTION: If the rotary turbine control valve linkage is only removed from the actuator side, the rotary turbine control valve linkage can be reattached to the actuator and reused. If the rotary turbine control valve linkage is removed from the turbine valve shaft, the rotary turbine control valve linkage must be replaced.

Inspect the rotary turbine control valve actuator linkage for damage.

Is the inspection result normal?

YES

GO TO 6 .

NO
- Replace the rotary turbine actuator linkage. Refer to Exploded View .
- GO TO 8 .
RUN THE TURBINE CONTROL VALVE ACTUATOR CALIBRATION
Using CONSULT, connect to "ENGINE" and perform the "RTCV actuator calibrate" under Work Support.

RTCV actuator calibration process completed successfully"

YES

GO TO 7 .

NO
- A turbocharger mechanical malfunction has been detected. Replace the turbocharger assembly. Refer to Exploded View .
- GO TO 8 .
CHECK FOR PROGRESSIVE DAMAGE TO THE AFTER TREATMENT SYSTEM
Perform the following snap acceleration test:
1. Engage the parking brakes
2. Place the shift lever in neutral.
3. start the engine and let it idle to reach normal operating temperature.
4. Rapidly depress the accelerator pedal from 0 to 100% multiple times.
5. Check for black smoke exiting the exhaust as the engine accelerated from low to high idle.
  NOTE: A small puff of black smoke upon acceleration that clears at a steady high idle speed is normal.
Was visible black or grey smoke seen from the exhaust indicating progressive damage to the after treatment system?

YES
- Replace the damaged after treatment system. Refer to Removal and Installation .
- GO TO 8 .
NO

GO TO 8 .
ERASE CURRENT DTCS
1. Turn the engine OFF.
2. Turn ignition switch ON.
3. Using CONSULT, erase ENGINE diagnostic trouble codes.
4. Operate the engine within the "Conditions for Clearing the DTC".
5. Using CONSULT, check for current ENGINE diagnostic trouble codes.
Is DTC P003A-00 current?

YES

Diagnosis procedure needs to be repeated. Go to DTC Description .

NO

Repair complete.