Nissan Qashqai J11. Manual — part 521

EC9-240

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0470 EXHAUST GAS PRESSURE SENSOR

P0470 EXHAUST GAS PRESSURE SENSOR

DTC Logic

INFOID:0000000010309172

DTC DETECTION LOGIC

NOTE:
If DTC P0470 is displayed with DTC P0651, and P2263, perform the trouble diagnosis for DTC P0651,
and P2263. Refer to

EC9-108, "DTC Index"

.

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 5 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to

EC9-240, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309173

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 HARNESS CONNECTOR CONNECTIONS

Check exhaust gas pressure sensor 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 POWER SUPPLY CIRCUIT

Check the power supply of the exhaust gas pressure sensor.

Is the inspection result normal?

YES

>> GO TO 4.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0470

TBN UPSTR PRS SEN CIRC
(Exhaust pressure sensor “A”
circuit)
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO HIGH

• An excessively low voltage from the sensor

is sent to ECM.

• An excessively high voltage from the sensor

is sent to ECM.

Exhaust gas pressure sensor

+

-

Voltage

(Approx.)

Exhaust gas pressure sensor

Connector

Terminal

F135

3

Ground

5 V

P0470 EXHAUST GAS PRESSURE SENSOR

EC9-241

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

NO

>> Perform trouble diagnosis for power supply circuit.

4.

CHECK EXHAUST GAS PRESSURE SENSOR CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check exhaust gas pressure sensor 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

Refer to

EC9-241, "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

EC9-240, "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:0000000010309174

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

Connector

Terminal

Connector

Terminal

F83

104

F135

3

Existed

126

1

138

2

Exhaust gas pressure sensor

Resistance (Approx.)

+

-

Terminal

2

1

100 k

Ω

EC9-242

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0471 EXHAUST PRESSURE SENSOR

P0471 EXHAUST PRESSURE SENSOR

DTC Logic

INFOID:0000000010309175

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

EC9-108, "DTC Index"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DIAGNOSIS PROCEDURE

NOTE:
DTC P0471 can not duplicate.

>> Proceed to

EC9-242, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010502768

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 HARNESS CONNECTOR CONNECTIONS

Check exhaust gas pressure sensor 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 POWER SUPPLY CIRCUIT

Check the power supply of the exhaust gas pressure sensor.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform trouble diagnosis for power supply circuit.

4.

CHECK EXHAUST GAS PRESSURE SENSOR CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check exhaust gas pressure sensor 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: INCORRECT SEN-

SOR MOUNTING

• 2.DEF: SIGNAL INCOHER-

ENCE

• Difference between barometric pressure

and exhaust pressure while engine
stopped.

• Exhaust pressure is excessively low while

engine is running.

Exhaust gas pressure sensor

+

-

Voltage

(Approx.)

Exhaust gas pressure sensor

Connector

Terminal

F135

3

Ground

5 V

P0471 EXHAUST PRESSURE SENSOR

EC9-243

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

I

J

K

L

M

A

EC9

N

P

O

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK EXHAUST GAS PRESSURE SENSOR

Refer to

EC9-241, "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

EC9-240, "DTC Logic"

.

Is the DTC P0471 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:0000000010309177

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

Connector

Terminal

Connector

Terminal

F83

104

F135

3

Existed

126

1

138

2

Exhaust gas pressure sensor

Resistance (Approx.)

+

-

Terminal

2

1

100 k

Ω