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
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
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
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
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
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