Nissan Sentra. Manual - part 442

EC-464

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

COOLING FAN

4.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Check IPDM E/R. Refer to 

PCS-10, "CONSULT Function (IPDM E/R)"

 (With intelligent key sys-

tem) or 

PCS-38, "CONSULT Function (IPDM E/R)"

 (Without intelligent key system).

NO

>> Repair or replace error-detected parts.

Component Inspection (Cooling Fan Motor)

INFOID:0000000009758723

1.

CHECK COOLING FAN MOTOR

Supply cooling fan motor terminals with battery voltage and check operation.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace cooling fan motor. Refer to 

CO-17, "Removal and Installation"

.

Cooling fan motor

Condition

Operation

Terminal

+

−

1

4

12 V direct current supply 
between terminals 1 and 2

Cooling fan operates.

No supply

Cooling fan not operates.

2

3

12 V direct current supply 
between terminals 1 and 2

Cooling fan operates.

No supply

Cooling fan not operates.

REFRIGERANT PRESSURE SENSOR

EC-465

< DTC/CIRCUIT DIAGNOSIS >

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REFRIGERANT PRESSURE SENSOR

Component Function Check

INFOID:0000000009758724

1.

CHECK REFRIGERANT PRESSURE SENSOR OVERALL 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.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-465, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009758725

1.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

1. Turn ignition 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 OFF.

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 ground.
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

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

Connector

+

−

Terminal

E16

103

124

1.0 - 4.0 V

+

−

Voltage

(Approx.)

Refrigerant pressure sensor

Connector

Terminal

E35

3

Ground

5.0 V

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

E35

3

E16

104

Existed

EC-466

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

REFRIGERANT PRESSURE SENSOR

4. Also check harness for 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

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

tor.

2. Also check harness for short to ground and 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-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor. Refer to 

HAC-110, "Removal and Installation"

 (For automatic

air condittioner), or 

HAC-191, "Removal and Installation"

 (For manual air condittioner).

NO

>> Repair or replace error-detected parts. 

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

E35

1

E16

124

Existed

+

−

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

E35

2

E16

103

Existed

MALFUNCTION INDICATOR LAMP

EC-467

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MALFUNCTION INDICATOR LAMP

Component Function Check

INFOID:0000000009758726

1.

CHECK MIL FUNCTION

1. Turn ignition switch ON.

2. Check that MIL lights up.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-467, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009758727

1.

CHECK DTC WITH ECM

Check that DTC UXXXX is not displayed.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX. Refer to 

EC-94, "DTC Index"

.

2.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter. Refer to 

MWI-17, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble diagnosis for DTC indicated. Refer to 

MWI-26, "DTC Index"

.

3.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter. Refer to 

MWI-77, "Removal and Installation"

.

NO

>> Repair or replace error-detected parts.