Nissan Qashqai J11. Manual - part 422

ECK-248

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0487 EGR VOLUME CONTROL VALVE

HIGH PRESSURE EGR VOLUME CONTROL VALVE

LOW PRESSURE EGR VOLUME CONTROL VALVE

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

DTC CONFIRMATION PROCEDURE

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

ECK-247, "DTC Logic"

.

Is the DTC P0487 displayed again?

YES

>> GO TO 6.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

6.

CHECK LOW PRESSURE EGR VALVE MOTOR AND HIGH PRESSURE EGR VALVE MOTOR

Refer to 

ECK-248, "Component Inspection (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 (EGR Volume Control Valve Motor)

INFOID:0000000010289838

1.

CHECK LOW PRESSURE EGR VALVE MOTOR AND HIGH PRESSURE EGR VALVE MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect low pressure EGR valve and high pressure EGR valve harness connector.

3.

Check resistance between low pressure EGR valve and high pressure EGR valve terminals as follows.

HIGH PRESSURE EGR VOLUME CONTROL VALVE

+

-

Continuity

ECM

High pressure EGR volume 

control valve

Connector

Terminal

Connector

Terminal

F81

147

F60

2

Existed

148

5

F80

69

6

70

3

75

1

+

-

Continuity

ECM

Low pressure EGR volume 

control valve

Connector

Terminal

Connector

Terminal

F81

151

F34

6

Existed

152

5

F80

65

1

66

2

79

3

High pressure EGR volume 

control valve

Condition

Resistance (Approx.)

+

-

Terminal

2

5

Temperature 

°

C (

°

F)

23 (73)

2.4 

Ω

P0487 EGR VOLUME CONTROL VALVE

ECK-249

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

LOW PRESSURE EGR VOLUME CONTROL VALVE

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EGR volume control valve.

Low pressure EGR volume 

control valve

Condition

Resistance (Approx.)

+

-

Terminal

5

6

Temperature 

°

C (

°

F)

20 (68)

1.69 

Ω

ECK-250

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0488 EGR SYSTEM

P0488 EGR SYSTEM

DTC Logic

INFOID:0000000010289839

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 

ECK-250, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010289840

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.

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.

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

P0488

EGR VALVE POSITION CN-
TRL
(Exhaust gas recirculation 
throttle control circuit “A” 
range/performance)
• 1.DEF: NO RESPONSE 

FROM THE VALVE MO-
TOR

• 2.DEF: VALVE LOCKED

ECM detects EGR volume control valve 
regulation error.

• Harness or connectors
• High pressure EGR volume control valve
• Low pressure EGR volume control valve
• High pressure EGR volume control valve 

position sensor

• Low pressure EGR volume control valve 

position sensor

• ECM

P0488 EGR SYSTEM

ECK-251

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

D

E

F

G

H

I

J

K

L

M

A

ECK

N

P

O

HIGH PRESSURE EGR VOLUME CONTROL VALVE

LOW PRESSURE EGR VOLUME CONTROL VALVE

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

DTC CONFIRMATION PROCEDURE

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

ECK-250, "DTC Logic"

.

Is the DTC P0488 displayed again?

YES

>> GO TO 6.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

6.

CHECK EGR VOLUME CONTROL VALVE MOTOR

Refer to 

ECK-251, "Component Inspection (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 (EGR Volume Control Valve Motor)

INFOID:0000000010289841

1.

CHECK EGR VOLUME CONTROL VALVE MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect EGR volume control valve harness connector.

3.

Check resistance between EGR volume control valve terminals as follows.

HIGH PRESSURE EGR VOLUME CONTROL VALVE

+

-

Continuity

ECM

High pressure EGR volume 

control valve

Connector

Terminal

Connector

Terminal

F81

147

F60

2

Existed

148

5

F80

69

6

70

3

75

1

+

-

Continuity

ECM

Low pressure EGR volume 

control valve

Connector

Terminal

Connector

Terminal

F81

151

F34

6

Existed

152

5

F80

65

1

66

2

79

3

EGR volume control valve

Resistance (Approx.)

+

-

Terminal

2

5

2.4 

Ω