Nissan Qashqai (2007-2010). Manual - part 463

P0487 EGR VOLUME CONTROL VALVE

EC-1371

< COMPONENT DIAGNOSIS >

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5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000000956113

1.

CHECK EGR VOLUME CONTROL VALVE CONTROL 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.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EGR volume control valve.

Terminals

Resistance

2 and 6

2.3 

Ω

EC-1372

< COMPONENT DIAGNOSIS >

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P0488 EGR SYSTEM

P0488 EGR SYSTEM

DTC Logic

INFOID:0000000001115082

DTC DETECTION LOGIC

NOTE:
• Conditions for applying the diagnostic procedure to the stored DTCs:

The DTC is declared present after the engine is started.

• Special notes:
- Engine instability, possibly even stalling.
- Difficult to start engine or even impossible when cold.
- Loss of performance.
- Possible smoke emissions.
- Malfunction indicator (Red) lights up.

Diagnosis Procedure

INFOID:0000000000956116

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Check ground connection E17. Refer to Ground inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK EGR VOLUME CONTROL VALVE INSTALLATION

Check that EGR volume control valve is installed properly.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Install EGR volume control valve properly.

3.

CHECK EGR VOLUME CONTROL VALVE CONTROL POSITION SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect EGR volume control valve harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between EGR volume control valve control position sensor connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK EGR VOLUME CONTROL VALVE CONTROL POSITION SENSOR GROUND CIRCUIT FOR

DTC No.

Trouble diagnosis name

Possible cause

P0488

EGR VOLUME CONTROL
• 1.DEF: Signal incoherence
• 2.DEF: Signal outside lower level
• 3.DEF: Signal outside upper level
• 4.DEF: Valve outside level
• 5.DEF: Defective sensor

• Harness or connectors

(The EGR volume control valve circuit is open 
or shorted.)
(The EGR volume control valve control posi-
tion sensor circuit is open or shorted.)

• EGR volume control valve
• EGR volume control valve control position 

sensor

• Incorrect EGR volume control valve installa-

tion

• EGR volume control valve stuck closed
• EGR passage clogged

GR volume control valve control position sensor

Ground

Voltage

Connector

Terminal

F99

1

Ground

Approx. 5V

P0488 EGR SYSTEM

EC-1373

< COMPONENT DIAGNOSIS >

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OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between EGR volume control valve control position sensor harness connector and
ECM harness connector.

4.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK EGR VOLUME CONTROL VALVE CONTROL POSITION SENSOR INPUT CIRCUIT FOR OPEN

AND SHORT

1.

Check the continuity between EGR volume control valve control position sensor harness connector and
ECM harness connector.

2.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK EGR VOLUME CONTROL VALVE CONTROL MOTOR CIRCUIT

1.

Check harness continuity between the following terminals.

2.

Also check harness for short to ground and short to power. 

Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK EGR VOLUME CONTROL VALVE VISUALLY

1.

Remove the EGR volume control valve

2.

Check if foreign matter is caught between the EGR volume control valve and the housing.

Is the inspection result normal?

YES 

>> GO TO 8.

NO

>> Remove the foreign matter and clean the EGR volume control valve.

8.

CHECK EGR PASSAGE

Check the following for clogging and cracks.
• EGR tube

EGR volume control valve control posi-

tion sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F99

3

F85

82

Existed

EGR volume control valve control posi-

tion sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F99

5

F85

86

Existed

EGR volume control valve

ECM

Continuity

Connector

Terminal

Connector

Terminal

F99

2

F68

95

Existed

96

Not existed

6

95

Not existed

96

Existed

EC-1374

< COMPONENT DIAGNOSIS >

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P0488 EGR SYSTEM

• EGR hose
• EGR cooler
Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace EGR passage.

9.

CHECK EGR VOLUME CONTROL VALVE 

Refer to 

EC-1378, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 11. 

10.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 11. 

NO

>> Repair or replace.

11.

REPLACE EGR VOLUME CONTROL VALVE

1.

Replace the EGR volume control valve.

2.

Perform 

EC-1274, "EGR VOLUME CONTROL VALVE CLOSED POSITION LEARNING : Special Repair

Requirement"

>> INSPECTIO END

Component Inspection

INFOID:0000000001091544

1.

CHECK EGR VOLUME CONTROL VALVE CONTROL 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.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EGR volume control valve.

Terminals

Resistance

2 and 6

2.3 

Ω