Nissan Qashqai J11. Manual - part 421

ECK-244

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0470 EXHAUST GAS PRESSURE SENSOR

YES

>> GO TO 4.

NO

>> Perform trouble diagnosis for power supply circuit.

4.

CHECK EXHAUST GAS PRESSURE SENSOR 1 CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK EXHAUST GAS PRESSURE SENSOR 1

Refer to 

ECK-244, "Component Inspection (Exhaust Gas Pressure Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace error-detected parts.

6.

DTC CONFIRMATION PROCEDURES

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

ECK-243, "DTC Logic"

.

Is the DTC P0470 displayed again?

YES

>> GO TO 7.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

7.

CHECK TURBOCHARGER

Check turbocharger.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (Exhaust Gas Pressure Sensor)

INFOID:0000000010289832

1.

CHECK EXHAUST GAS PRESSURE SENSOR

1.

Disconnect exhaust gas pressure sensor harness connector.

2.

Check the resistance between exhaust gas pressure sensor terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace exhaust gas pressure sensor.

+

-

Continuity

ECM

Exhaust gas pressure sen-

sor 1

Connector

Terminal

Connector

Terminal

F80

77

F110

3

Existed

78

1

83

2

Exhaust gas pressure sensor

Resistance (Approx.)

+

-

Terminal

2

1

100 k

Ω

P0471 EXHAUST GAS PRESSURE SENSOR 1

ECK-245

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

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ECK

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P0471 EXHAUST GAS PRESSURE SENSOR 1

DTC Logic

INFOID:0000000010289833

DTC DETECTION LOGIC

NOTE:
If DTC P0471 is displayed with DTC P0335, P0470, and P2226, perform the trouble diagnosis for DTC
P0335, P0470, and P2226. Refer to 

ECK-97, "DTC Index"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P0471 can not duplicate.

>> Proceed to 

ECK-245, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010289834

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK EXHAUST GAS PRESSURE SENSOR 1 HARNESS CONNECTOR CONNECTIONS

Check exhaust gas pressure sensor 1 harness connector connection.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK EXHAUST GAS PRESSURE SENSOR 1 POWER SUPPLY CIRCUIT

Check the power supply of the exhaust gas pressure sensor 1.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform trouble diagnosis for power supply circuit.

4.

CHECK EXHAUST GAS PRESSURE SENSOR 1 CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

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

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0471

PRS UPSTR OF TBN
(Exhaust pressure sensor “A” circuit 
range/performance)
• 1.DEF: SIGNAL INCOHERENCE
• 2.DEF: INCORRECT SENSOR 

MOUNTING

• Difference between barometric pressure 

and exhaust pressure while engine stopped.

• Difference between upstream DPF pressure 

and exhaust pressure while engine is run-
ning at idle.

• Exhaust gas pressure sensor 1
• Turbocharger
• Exhaust manifold
• Exhaust tube
• ECM

+

-

Continuity

Exhaust gas pressure sensor 1

Connector

Terminal

F110

3

Ground

Existed

ECK-246

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0471 EXHAUST GAS PRESSURE SENSOR 1

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

DTC CONFIRMATION PROCEDURES

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

ECK-245, "DTC Logic"

.

Is the DTC P0471 displayed again?

YES

>> GO TO 6.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

6.

CHECK THE EXHAUST GAS PRESSURE SENSOR 1 FOR LEAK

Visually check the exhaust gas pressure sensor 1 for air leak.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace the malfunctioning part.

7.

CHECK EXHAUST GAS PRESSURE SENSOR 1

Refer to 

ECK-246, "Component Inspection (Exhaust Gas Pressure Sensor 1)"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace error-detected parts.

8.

CHECK TURBOCHARGER

Check turbocharger.
Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (Exhaust Gas Pressure Sensor 1)

INFOID:0000000010289835

1.

CHECK EXHAUST GAS PRESSURE SENSOR 1

1.

Disconnect exhaust gas pressure sensor 1 harness connector.

2.

Check the resistance between exhaust gas pressure sensor 1 terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace exhaust gas pressure sensor 1.

+

-

Continuity

ECM

Exhaust gas pressure sen-

sor 1

Connector

Terminal

Connector

Terminal

F80

77

F110

3

Existed

78

1

83

2

Exhaust gas pressure sensor 1

Resistance (Approx.)

+

-

Terminal

2

1

100 k

Ω

P0487 EGR VOLUME CONTROL VALVE

ECK-247

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

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P0487 EGR VOLUME CONTROL VALVE

DTC Logic

INFOID:0000000010289836

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 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

ECK-247, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010289837

1.

CHECK LOW PRESSURE EGR VALVE AND HIGH PRESSURE EGR VALVE

Visually check low pressure EGR valve and high pressure EGR valve for chipping.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection F80 and F81.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK LOW PRESSURE EGR VALVE AND HIGH PRESSURE EGR VALVE HARNESS CONNECTOR

CONNECTIONS

Check low pressure EGR valve and high pressure EGR valve harness connector connection F34 and F60.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK LOW PRESSURE EGR VALVE AND HIGH PRESSURE EGR VALVE CIRCUIT FOR OPEN AND

SHORT

1.

Turn ignition switch OFF.

2.

Check low pressure EGR valve and high pressure EGR valve circuit for open and short.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0487

EGR VLV CMD CIRC
(Exhaust gas recirculation 
throttle control circuit “A”/
open)
• 1.DEF: OFFSET IM-

PLAUSIBLE

ECM detects abnormally closed posi-
tion of EGR volume control valve.

• Harness or connectors
• High pressure EGR volume control valve
• Low pressure EGR volume control valve
• High pressure EGR valve position sensor
• Low pressure EGR valve position sensor
• ECM