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 U010C-00 being current on the CONSULT screen.
Is DTC U010C-00 detected as current or more than one past count?

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 being current on the CONSULT screen.
Are DTCs U029E-00, U0106-00, U029D-00, U1611-00 or U1612-00 detected as current or are there more than one past count?

YES

GO TO 7 .

NO

GO TO 3 .
INSPECT ROTARY TURBINE CONTROL VALVE ACTUATOR AND HARNESS CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect rotary turbine control valve actuator harness connector F146.
3. Inspect the rotary turbine control valve actuator 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 4 .

NO

Repair or replace error-detected parts.

CHECK POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect rotary turbine control valve actuator harness connector F146.
Turn ignition switch ON.

Check voltage between rotary turbine control valve actuator connector F146 terminal 1 and 4.

Rotary turbine control valve actuator

Voltage

(Approx.)

Connector

Terminal

F146

>10.8V

Is the inspection result normal?

YES

GO TO 7 .

GO TO 5

INSPECT BATTERY TERMINAL CONNECTIONS
1. Turn ignition switch OFF.
2. Inspect the battery terminal connections for the following:
  - Loose connector
  - Corroded terminals
  - Moisture in or on the connector
  - Dirt or debris on the connector
  - Wire insulation damage
Is the inspection result normal?

YES

GO TO 6 .

NO

Repair or replace error-detected parts.

CHECK FOR OPEN CIRCUIT

Turn ignition switch OFF.
Disconnect rotary turbine control valve actuator harness connector F146.

Check voltage between rotary turbine control valve actuator harness connector F146 terminal 4 and ground.

Rotary turbine control valve actuator

(-)

Voltage

(Approx.)

Connector

Terminal

F146

Ground

>10.8V

Is the inspection result normal?

YES

An open or high resistance is present in the rotary turbine control valve actuator ground circuit. Repair or replace error-detected parts.

An open or high resistance is present in the rotary turbine control valve actuator power supply circuit. Repair or replace error-detected parts.

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.

INSPECT CAN 2 COMMUNICATION HARNESS FOR OPEN

Turn ignition switch OFF.
Disconnect rotary turbine control valve actuator connector F146.
Disconnect ECM connector F101.
Measure the resistance between rotary turbine control valve actuator connector F146 terminal 3 and ECM connector F101 terminal 123.

Measure the resistance between rotary turbine control valve actuator connector F146 terminal 2 and ECM connector F101 terminal 102.

Rotary turbine control valve actuator		ECM		Resistance
Connector	Terminal	Connector	Terminal
F146	3	F101	123	<10 Ω
	2		102

Is the inspection result normal?

YES

GO TO 9

Repair or replace error-detected parts.

INSPECT CAN 2 COMMUNICATION HARNESS FOR SHORT CIRCUIT

Turn ignition switch OFF and wait at least 1 minute for the DEF control module to completely power down.
Disconnect outlet NOx sensor harness connector C33, intake NOx sensor harness connector C31, DPF temperature sensor module connector C29, SCR temperature sensor C30, rotary turbine control valve actuator connector F146, glow plug control module F102 and ECM connector E93 and F101.
Measure the resistance between ECM connector E93 terminal 35 and all other ECM connector E93 terminals.
Measure the resistance between ECM connector E93 terminal 18 and all other ECM connector E93 terminals.
Measure the resistance between ECM connector F101 terminal 123 and all other ECM connector F101 terminals.

Measure the resistance between ECM connector F101 terminal 102 and all other ECM connector F101 terminals.

ECM			Resistance
Connector	Terminal (+)	Terminal (-)
E93	35	All others	>100K Ω
	18
F101	123
	102

Is the inspection result normal?

YES

GO TO 10 .

Repair or replace error-detected parts.

INSPECT CAN 2 COMMUNICATION HARNESS FOR SHORT TO GROUND

Turn ignition switch OFF and wait at least 1 minute for the DEF control module to completely power down.
Measure the resistance between all ECM connector E93 terminals and ground.

Measure the resistance between all ECM connector F101 terminals and ground.

ECM			Resistance
Connector	Terminal (+)	Terminal (-)
E93	All terminals	Ground	>100K Ω
F101	All terminals

Is the inspection result normal?

YES

GO TO 11 .

Repair or replace error-detected parts.

CHECK CAN 2 COMMUNICATION TERMINATING RESISTANCE

Turn ignition switch OFF.

Measure the resistance between ECM harness connector F101 terminals 123 and 102.

ECM			Resistance
Connector	Terminal	Terminal	Resistance
F101	123	102	110-130 Ω

Is the inspection result normal?

YES

GO TO 14 .

GO TO 12 .

CHECK CAN 2 COMMUNICATION TERMINATING RESISTANCE

Turn ignition switch OFF.
Disconnect rotary turbine control valve actuator harness connector F146 and ECM harness connectors E93 and F101.

Measure the resistance between ECM harness connector E93 terminals 35 and 18.

ECM			Resistance
Connector	Terminal	Terminal	Resistance
E93	35	18	105-130 Ω

Is the inspection result normal?

YES

Repair or replace error-detected parts.

GO TO 13 .

CHECK CAN 2 COMMUNICATION TERMINATING RESISTANCE

Turn ignition switch OFF.
Disconnect rotary turbine control valve actuator harness connector F146.

Measure the resistance between rotary turbine control valve actuator harness connector F146 terminals 3 and 2.

Rotary turbine control valve actuator			Resistance
Connector	Terminal	Terminal	Resistance
F146	3	2	110-130 Ω

Is the inspection result normal?

YES

Repair or replace error-detected parts.

Replace rotary turbine control valve actuator. Refer to Removal and Installation .

CHECK DTC PRIORITY
1. Turn ignition switch OFF.
2. Connect rotary turbine control valve actuator harness connector F146.
3. Connect CONSULT and check for ENGINE diagnostic trouble codes.
4. Check for DTC U010C-00 being current on the CONSULT screen.
Is DTC U010C-00 detected as current or more than one past count?

YES
- Replace rotary turbine control valve actuator. Refer to Removal and Installation .
- GO TO 15 .
NO

Removal and installation of rotary turbine control valve actuator harness connector F146 corrected the fault.
ERASE DTC
1. Connect all components.
2. Turn ignition switch ON.
3. Using CONSULT erase ENGINE diagnostic trouble codes.
4. Perform DTC CONFIRMATION PROCEDURE.
Is U010C-00 DTC current?

YES

Return to the diagnosis procedure steps if all steps have been completed and checked again.

NO

Repair complete.