Nissan Qashqai (2007-2010). Manual — part 463
P0487 EGR VOLUME CONTROL VALVE
EC-1371
< COMPONENT DIAGNOSIS >
[K9K]
C
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EC
N
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5.
CHECK INTERMITTENT INCIDENT
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 >
[K9K]
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
.
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 >
[K9K]
C
D
E
F
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A
EC
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P
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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 >
[K9K]
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
EC-1378, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 11.
10.
CHECK INTERMITTENT INCIDENT
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
>> 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
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