Nissan Quest E52. Manual - part 558

EC-442

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

REFRIGERANT PRESSURE SENSOR

REFRIGERANT PRESSURE SENSOR

Component Function Check

INFOID:0000000009651302

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-442, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009651303

1.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

1.

Disconnect refrigerant pressure sensor harness connector.

2.

Turn ignition switch ON.

3.

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 OFF.

2.

Disconnect ECM harness connector.

3.

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

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

3.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

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

ECM

Voltage (V)

Connector

+

–

Terminal

Terminal

F8

63

(Refrigerant pressure sensor signal)

64

(Sensor ground)

1.0 - 4.0

Refrigerant pressure sensor

Ground

Voltage (V)

Connector

Terminal

E300

1

Ground

Approx. 5

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E300

1

F8

96

Existed

REFRIGERANT PRESSURE SENSOR

EC-443

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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N

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4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

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

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor. Refer to 

HA-43, "Exploded View"

.

NO

>> Repair or replace error-detected parts.

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E300

3

F8

64

Existed

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E300

2

F8

63

Existed

EC-444

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

SENSOR POWER SUPPLY2 CIRCUIT

SENSOR POWER SUPPLY2 CIRCUIT

Description

INFOID:0000000009888617

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

Sensor power supply 1

• Accelerator pedal position (APP) sensor 1
• Camshaft position (CMP) sensor (PHASE)
• Electric throttle control actuator
• Battery current sensor
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

• Accelerator pedal position (APP) sensor 2
• Crankshaft position (CKP) sensor (POS)
• Refrigerant pressure sensor
• EVAP control system pressure sensor

Diagnosis Procedure

INFOID:0000000009888618

1.

CHECK SENSOR POWER SUPPLY 1

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connectors

3.

Turn ignition switch ON.

4.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect following sensors harness connector.

3.

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

Is the inspection result normal?

YES

>> GO TO 3.

+

−

Voltage

(Approx.)

ECM

Connector

Terminal

F8

54

Ground

5 V

96

E16

103

107

ECM

Sensor

+

Name

+

Connector

Terminal

Connector

Terminal

F8

54

CKP sensor (POS)

F20

1

96

Refrigerant pressure sensor

E300

1

E16

103

APP sensor 2

E110

5

107

EVAP control system pressure sensor

B22

3

SENSOR POWER SUPPLY2 CIRCUIT

EC-445

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

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J

K

L

M

A

EC

N

P

O

NO

>> Repair or replace error-detected parts.

3.

CHECK COMPONENTS

Check the following.
• Crankshaft position sensor (POS) (Refer to 

EC-273, "Component Inspection"

.)

• Refrigerant pressure sensor (Refer to 

EC-442, "Diagnosis Procedure"

.)

• APP sensor 2 (Refer to 

EC-405, "Component Inspection"

.)

• EVAP control system pressure sensor (Refer to 

EC-308, "Component Inspection"

.)

Is the inspection result normal?

YES

>> Perform 

GI-42, "Intermittent Incident"

.

NO

>> Replace malfunctioning component.