Nissan Qashqai J11. Manual - part 424

ECK-256

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0525 ASCD SYSTEM

P0525 ASCD SYSTEM

DTC Logic

INFOID:0000000010289845

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P0525 can not duplicate.

>> Proceed to 

ECK-256, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010289846

1.

REPLACE ECM

1.

Turn ignition switch OFF and wait at least 1 minute.

2.

Replace ECM. 

3.

Perform 

ECK-131, "Work Procedure"

.

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0525

CRUISE CONTROL DATA MONITOR-
ING
(Cruise control servo control circuit 
range/performance)
• 1.DEF: SIGNAL COMPARE FAIL-

URE

Correlation between two signals is inconsistency.

P0530 REFRIGERANT PRESSURE SENSOR

ECK-257

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

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ECK

N

P

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P0530 REFRIGERANT PRESSURE SENSOR

DTC Logic

INFOID:0000000010289847

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

ECK-257, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010289848

1.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect refrigerant pressure sensor harness connector.

2.

Check the voltage between refrigerant pressure sensor connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

2.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF and wait at least 1 minute.

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 and short to power. 

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0530

REFG TEMP PRESS SEN VOLT
(A/C refrigerant pressure sensor “A” 
circuit)
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO HIGH

• Refrigerant pressure sensor signal 

voltage remains more than 4.75 V 
for 2 seconds or more.

• Refrigerant pressure sensor signal 

voltage remains less than 0.1 V for 2 
seconds or more.

• Harness or connectors

(Refrigerant pressure sensor circuit is 
open or shorted.)

• Refrigerant pressure sensor

+

-

Voltage

(Approx.)

Refrigerant pressure sensor

Connector

Terminal

E41

3

Ground

5.0 V

+

-

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

E41

1

F81

125

Existed

ECK-258

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0530 REFRIGERANT PRESSURE SENSOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

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 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor.

NO

>> Repair or replace.

+

-

Continuity

Refrigerant pressure sensor

ECM

Connector

Terminal

Connector

Terminal

E41

2

F81

99

Existed

P0544 EGT SENSOR 1

ECK-259

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

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ECK

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P0544 EGT SENSOR 1

DTC Logic

INFOID:0000000010289849

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P0544 can not duplicate.

>> Proceed to 

ECK-259, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010289850

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection F81.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK EXHAUST GAS TEMPERATURE SENSOR 1 HARNESS CONNECTOR CONNECTIONS

Check exhaust gas temperature sensor 1 control valve harness connector connection F92.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK EXHAUST GAS TEMPERATURE SENSOR 1 CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check exhaust gas temperature sensor 1 circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK EXHAUST GAS TEMPERATURE SENSOR 1 CONTROL VALVE MOTOR

Refer to 

ECK-260, "Component Inspection (Exhaust Gas Temperature Sensor 1)"

.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0544

TBN UPS TEMP SEN CIRC
(Exhaust gas temperature sensor cir-
cuit bank 1 sensor 1)
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO HIGH
• 3.DEF: SIGNAL INCOHERENCE
• 4.DEF: IMPROPER SIGNAL 

SHAPE

• 5.DEF: NO SIGNAL SPECIFIC 

SUBTYPE

• An excessively low voltage from Ex-

haust Gas Temperature sensor is 
sent to ECM for 15 seconds or 
more.

• An excessively high voltage from 

Exhaust Gas Temperature sensor is 
sent to ECM for 1 second or more.

• ECM detects an improper exhaust 

gas temperature.

• Harness or connectors

(Exhaust gas temperature sensor 1 
circuit is open or shorted.)

• Exhaust gas temperature sensor 1
• ECM

+

-

Continuity

ECM

EGT sensor 1

Connector

Terminal

Connector

Terminal

F81

114

F92

1

Existed

115

2