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 P0652-00 or P0653-00 being current on the CONSULT screen.
Is applicable DTC detected as current?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
3. Check for DTC P012C-00 being current on the CONSULT screen.
Is DTC P012C-00 detected as current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .
INSPECT TURBOCHARGER COMPRESSOR INTAKE PRESSURE/TEMPERATURE SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect turbocharger compressor intake pressure/temperature sensor harness connector F105.
3. Inspect the harness connector and turbocharger compressor intake pressure/temperature sensor 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 THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUIT

Turn ignition switch OFF.
Disconnect the turbocharger compressor intake pressure/temperature sensor harness connector F105.
Turn ignition switch ON.

Measure the voltage between turbocharger compressor intake pressure/temperature sensor harness connector F105 terminals 2 and 4.

Turbocharger compressor intake pressure/temperature sensor

Voltage

(Approx.)

Connector

Terminal

F105

4.75V - 5.25V

Is inspection result normal?

YES

GO TO 5.

GO TO 7.

CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Disconnect turbocharger compressor intake pressure/temperature sensor harness connector F105.
3. Connect a jumper wire between turbocharger compressor intake pressure/temperature sensor harness connector F105 terminal 1 and 2.
4. Turn ignition switch ON and wait 30 seconds.
5. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did P012D-00 DTC become current and P012C-00 become past?

YES

GO TO 6 .

NO

GO TO 10 .
CHECK THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Connect turbocharger compressor intake pressure/temperature sensor harness connector F105.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did DTC P012C-00 become current?

YES

Replace turbocharger compressor intake pressure/temperature sensor. Refer to Removal and Installation .

NO

The removal and installation of the connector corrected the malfunction.
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.

CHECK THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUIT

Turn ignition switch OFF.
Disconnect the ECM harness connector F101.
Turn ignition switch ON.

Measure the voltage between terminal 106 and 127 at the ECM connector F101.

ECM

Voltage

(Approx.)

Connector

Terminal

F101

106

127

4.75V - 5.25V

Is inspection the result normal?

YES

GO TO 9.

Replace the ECM. Refer to Removal and Installation .

CHECK DTC PRIORITY
1. Connect all components.
2. Turn ignition switch ON.
3. Connect CONSULT and check for ENGINE diagnostic trouble codes.
4. Check for DTC P012C-00 being past on the CONSULT screen.
Is the inspection result normal?

YES

The removal and installation of the connector corrected the issue.

NO

Repair or replace the harness for an open or shorted circuit.
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 11 .

NO

Repair or replace error-detected parts.
CHECK THE ECM RESPONSE
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector F101.
3. Connect a jumper wire between ECM harness connector F101 terminal 106 and 129.
4. Turn ignition switch ON and wait 30 seconds.
5. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did DTC P012D-00 become current and P012C become past?

YES

GO TO 7 .

NO

Replace ECM. Refer to Removal and Installation .
CHECK DTC PRIORITY
1. Connect all components.
2. Turn ignition switch ON.
3. Connect CONSULT and check for ENGINE diagnostic trouble codes.
4. Check for DTC P012C-00 being past on the CONSULT screen.
Is DTC P012C-00 detected as past?

YES

The removal and installation of the connector corrected the issue.

NO

Repair or replace harness for an open or pin-to-pin short.