Nissan X-Trail 32. Manual - part 819

SENSOR POWER SUPPLY 2 CIRCUIT

EC-405

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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SENSOR POWER SUPPLY 2 CIRCUIT

Description

INFOID:0000000010775296

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respec-
tively.Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simulta-
neouslyin the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

• CKP sensor (POS)
• APP sensor 1
• Exhaust valve timing control position sensor
• Electric throttle control actuator
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

• Atmospheric pressure sensor
• Refrigerant pressure sensor
• Fuel rail pressure sensor
• CMP sensor
• APP sensor 2
• Engine oil pressure sensor

Diagnosis Procedure

INFOID:0000000010775297

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-1

1.

Turn ignition switch OFF.

2.

Disconnect accelerator pedal position (APP) sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

+

−

Voltage

(Approx.)

APP sensor

Connector

Terminal

CVT models

E110

5

Ground

5  V

M/T models

E167

+

−

Continuity

APP sensor

ECM

Connector

Terminal

Connector

Terminal

CVT models

E110

5

E16

118

Existed

M/T models

E167

EC-406

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

SENSOR POWER SUPPLY 2 CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK COMPONENTS

Check the following.
• Refrigerant pressure sensor (Refer to 

EC-407, "Diagnosis Procedure"

)

• Fuel rail pressure sensor (Refer to 

EC-260, "Component Inspection"

)

• Engine oil pressure sensor (Refer to 

EC-306, "Component Inspection"

)

• Atmospheric pressure sensor (Refer to 

EC-204, "Component Inspection"

)

• CMP sensor (Refer to 

EC-285, "Component Inspection"

)

• Exhaust valve timing control position sensor (Refer to 

EC-329, "Component Inspection"

)

Is the inspection result normal?

YES

>> Proceed to 

GI-44, "Intermittent Incident"

.

NO

>> Replace malfunctioning part.

+

−

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

E16

101

Atmospheric pressure sensor

E67

1

118

APP sensor 2

CVT models

E110

5

M/T models

E167

F7

23

Refrigerant pressure sensor

F42

3

Engine oil pressure sensor

F106

3

Fuel rail pressure sensor

F62

1

43

CMP sensor

F105

1

REFRIGERANT PRESSURE SENSOR

EC-407

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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REFRIGERANT PRESSURE SENSOR

Component Function Check

INFOID:0000000010775298

1.

CHECK REFRIGERANT PRESSURE SENSOR FUNCTION

1.

Start engine and warm it up to normal operating temperature.

2.

Turn A/C switch and blower fan switch ON.

3.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-407, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010775299

1.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect refrigerant pressure sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between refrigerant pressure sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Disconnect ECM harness connector.

3.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

4.

Also check harness for short to power.

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT

1.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

ECM

Voltage

Connector

+

–

Terminal

F7

34

39

1.0 - 4.0 V

+

−

Voltage

(Approx.)

Refrigerant pressure sensor

Connector

Terminal

F42

3

Ground

5 V

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

F42

3

F7

23

Existed

EC-408

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

REFRIGERANT PRESSURE SENSOR

2.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT

1.

Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.

2.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-44, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor. Refer to 

HAC-225, "Removal and Installation"

.

NO

>> Repair or replace malfunctioning part.

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

F42

1

F7

39

Existed

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

F42

2

F7

34

Existed