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 P1193-00 being current on the CONSULT screen.
Is DTC P1193-00 detected as current?

YES

GO TO 2 .

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 3 .

NO

Repair or replace error-detected parts.
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 3 and 4.
4. Turn ignition switch ON and wait 30 seconds.
5. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
Did DTC P1192-00 become current and P1193 become past?

YES

GO TO 4 .

NO

GO TO 5 .
CHECK DTCS AND VERIFY SENSOR CONDITION
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.
Is DTC P1193-00 current?

YES

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

NO

The removal and installation of the connector corrected the issue.
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 6 .

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 109 and 127.
4. Turn ignition switch ON and wait 30 seconds.
5. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
Did DTC P1192-00 become current and P1193-00 become past?

YES

GO TO 7 .

NO

Replace ECM. Refer to Removal and Installation .

CHECK FOR AN OPEN CIRCUIT IN THE ENGINE HARNESS

Turn ignition switch OFF.
Disconnect the ECM harness connector F101.
Disconnect the turbocharger compressor intake pressure/temperature sensor harness connector F105.

Measure the resistance between the ECM harness connector and the turbocharger compressor intake pressure/temperature sensor harness connector.

ECM		Turbocharger compressor intake pressure/temperature sensor		Resistance
Connector	Terminal	Connector	Terminal
F101	127	F105	4	< 10 Ω
	109		3

Is the inspection result normal?

YES

GO TO 8 .

Repair or replace the engine harness for an open.

CHECK FOR A PIN-TO-PIN SHORT CIRCUIT IN THE ENGINE HARNESS

Turn ignition switch OFF.
Disconnect the ECM harness connector F101.
Disconnect the turbocharger compressor intake pressure/temperature sensor harness connector F105.

Measure the resistance between the ECM harness connector terminal 109 and all other terminals in the ECM harness connector F101.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
F101	109	F101	All	> 100k Ω

Is the inspection result normal?

YES

GO TO 9 .

Repair or replace the engine harness for a short.

CHECK PAST DTC
1. Turn ignition switch OFF.
2. Connect all components.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
Did P1193-00 DTC become past?

YES

The removal and installation of the connector corrected the fault.

NO

Troubleshooting procedures need to be repeated from the beginning. A DTC mode should have been be detected.