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 sensor supply DTCs P06D4-00 being current on the CONSULT screen.
Is applicable DTC detected?

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 P0533-00 being past on the CONSULT screen.
Is DTC P0533-00 detected as past?

YES

Refer to Intermittent Incident .

NO

GO TO 3 .
INSPECT REFRIGERANT PRESSURE SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect refrigerant pressure sensor harness connector E88.
3. Inspect the engine harness and refrigerant pressure sensor 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 THE CIRCUIT RESPONSE
1. Turn ignition switch OFF.
2. Disconnect refrigerant pressure sensor harness connector E88.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.
Did DTC P0532-00 become current and DTC P0533-00 become past?

YES

GO TO 5 .

NO

GO TO 7 .

CHECK THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUIT

Turn ignition switch OFF.
Disconnect the refrigerant pressure sensor harness connector E88.
Turn ignition switch ON.

Measure the voltage between refrigerant pressure sensor harness connector E88 terminals 1 and 2.

Refrigerant pressure sensor

Voltage (V)

(Approx.)

Connector

Terminal

E88

4.75-5.25

Is the inspection result normal?

YES

GO TO 6.

GO TO 10.

CHECK DTCS AND VERIFY SENSOR CONDITION
1. Turn ignition switch OFF.
2. Connect the refrigerant pressure sensor harness connector E88.
3. Turn ignition switch ON and wait 30 seconds.
4. Connect CONSULT and check for current "ENGINE" diagnostic trouble codes.
Is DTC P0533-00 current?

YES

Replace the refrigerant pressure 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 E93.
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 FOR AN OPEN CIRCUIT IN THE ENGINE HARNESS

Turn ignition switch OFF.
Disconnect the ECM harness connector E93.
Disconnect the refrigerant pressure sensor harness connector E88.

Measure the resistance between the ECM harness connector E93 terminal 64 and the refrigerant pressure sensor harness connector E88 terminal 1.

ECM		Refrigerant pressure sensor		Resistance
Connector	Terminal	Connector	Terminal	Resistance
E93	64	E88	1	< 10 Ω

Is resistance less than 10 ohms?

YES

GO TO 9 .

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 E93.
Disconnect the refrigerant pressure sensor harness connector E88.

Measure the resistance between the ECM harness connector E93 terminal 26 and all other terminals in the ECM harness connector E93.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
E93	26	E93	All	> 100k Ω

Is resistance greater than 100k ohms?

YES

GO TO 10 .

Repair or replace the engine harness for a short.

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

Turn ignition switch OFF.
Disconnect the ECM harness connector E93.
Disconnect the refrigerant pressure sensor harness connector E88.
Disconnect all components connected to sensor supply 5.

Measure the resistance between the ECM harness connector E93 terminal 81 and all other terminals in the ECM harness connector E93.

ECM		ECM		Resistance
Connector	Terminal	Connector	Terminal	Resistance
E93	81	E93	All	> 100k Ω

Is resistance greater than 100k ohms?

YES

GO TO 10 .

Repair or replace the engine harness for a short.

CHECK PAST DTC
1. Connect all components.
2. Turn ignition switch ON.
3. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
4. Check for DTC P0533-00 being past on the CONSULT screen.
Is the inspection result normal?

YES

The removal and installation of the connector corrected the issue.

NO

Replace the ECM. Refer to Removal and Installation .