Nissan Qashqai J11. Manual — part 537

EC9-304

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1487 LOW PRESSURE EGR VOLUME CONTROL VALVE

5.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check low pressure EGR volume control valve circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

DTC CONFIRMATION PROCEDURE

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to

EC9-297, "DTC Logic"

.

Is the DTC P1486 displayed again?

YES

>> GO TO 7.

NO

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

7.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR

Refer to

EC9-306, "Component Inspection (Low Pressure EGR Volume Control Valve Motor)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

NO

>> Replace error-detected parts.

Component Inspection (Low Pressure EGR Volume Control Valve Motor)

INFOID:0000000010503347

1.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect low pressure EGR volume control valve harness connector.

3.

Check resistance between low pressure EGR volume control valve terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace low pressure EGR volume control valve.

+

-

Continuity

ECM

Low pressure EGR volume

control valve

Connector

Terminal

Connector

Terminal

F82

55

F77

1

Existed

65

2

69

3

F83

136

6

143

5

Low pressure EGR volume control valve

Condition

Resistance

+

-

Terminal

5

6

Temperature

°

C (

°

F)

20 (68)

1.41

Ω

P1488 LOW PRESSURE EGR VOLUME CONTROL VALVE

EC9-305

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

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EC9

N

P

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P1488 LOW PRESSURE EGR VOLUME CONTROL VALVE

DTC Logic

INFOID:0000000010309299

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 3 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to

EC9-305, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010503348

1.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE

Visually check low pressure EGR volume control valve for chipping.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK DIESEL PARTICULATE FILTER

Refer to

EC9-359, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace diesel particulate filter.

3.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS

Check low pressure EGR volume control valve harness connector connection.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P1488

LOW PRESSURE EGR
VALVE
(Low pressure EGR valve)
• 1.DEF: NO RESPONSE

FROM THE VALVE MOTOR

• 2.DEF: CLOSING OF AIR

INLET FLAP

Low pressure EGR volume control
valve does not operate.

• Harness or connectors

(Low pressure EGR volume control valve circuit
is open or shorted.)

• Low pressure EGR volume control valve
• Low pressure EGR volume control valve position

sensor

EC9-306

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P1488 LOW PRESSURE EGR VOLUME CONTROL VALVE

5.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check low pressure EGR volume control valve circuit for open and short.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace error-detected parts.

6.

DTC CONFIRMATION PROCEDURE

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to

EC9-297, "DTC Logic"

.

Is the DTC P1488 displayed again?

YES

>> GO TO 7.

NO

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

7.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR

Refer to

EC9-306, "Component Inspection (Low Pressure EGR Volume Control Valve Motor)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-41, "Intermittent Incident"

.

NO

>> Replace error-detected parts.

Component Inspection (Low Pressure EGR Volume Control Valve Motor)

INFOID:0000000010503349

1.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect low pressure EGR volume control valve harness connector.

3.

Check resistance between low pressure EGR volume control valve terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace low pressure EGR volume control valve.

+

-

Continuity

ECM

Low pressure EGR volume

control valve

Connector

Terminal

Connector

Terminal

F82

55

F77

1

Existed

65

2

69

3

F83

136

6

143

5

Low pressure EGR volume control valve

Condition

Resistance

+

-

Terminal

5

6

Temperature

°

C (

°

F)

20 (68)

1.41

Ω

P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM TEM-

PERATURE SENSOR

EC9-307

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

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F

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EC9

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P1489 LOW PRESSURE EGR VOLUME CONTROL VALVE UPSTREAM
TEMPERATURE SENSOR

DTC Logic

INFOID:0000000010309302

DTC DETECTION LOGIC

NOTE:
If DTC P1489 is displayed with following DTC, first perform the trouble diagnosis for following DTC.
Refer to

EC9-108, "DTC Index"

.

• P1480, P1481, P1482, P1483, P1484, P1485, P1486, P1487 and P1488.

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 10 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to

EC9-307, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309303

1.

CHECK ECM HARNESS CONNECTOR CONNECTIONS

Check ECM harness connector connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS

Check low pressure EGR volume control valve harness connector connection.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK LOW PRESSURE EGR VOLUME CONTROL VALVE CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

DTC No.

CONSULT screen terms

(Trouble diagnosis con-

tent)

DTC detecting condition

Possible cause

P1489

LOW PRESSURE EGR
VALVE TEMPERATURE
SENSOR
(Low pressure EGR valve
temperature sensor)
• 1.DEF: VOLTAGE

TOO LOW

• 2.DEF: VOLTAGE

TOO HIGH

• 3.DEF: OPERATION

TEMPERATURE TOO
HIGH

• ECM detects a short circuit to battery.
• ECM detects a short circuit to ground.
• EGR cooler (low pressure) temperature is

180

°

C (356

°

F) or more.

• Harness or connectors

(Low pressure EGR volume control valve
upstream temperature sensor circuit is
shorted.)

• Low pressure EGR volume control valve

upstream temperature sensor