Nissan Qashqai J11. Manual — part 421
ECK-244
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P0470 EXHAUST GAS PRESSURE SENSOR
YES
>> GO TO 4.
NO
>> Perform trouble diagnosis for power supply circuit.
4.
CHECK EXHAUST GAS PRESSURE SENSOR 1 CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check exhaust gas pressure sensor 1 circuit for open and short.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK EXHAUST GAS PRESSURE SENSOR 1
ECK-244, "Component Inspection (Exhaust Gas Pressure Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace error-detected parts.
6.
DTC CONFIRMATION PROCEDURES
1.
Erase DTC.
2.
Perform DTC confirmation procedure again. Refer to
Is the DTC P0470 displayed again?
YES
>> GO TO 7.
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
7.
CHECK TURBOCHARGER
Check turbocharger.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace malfunctioning parts.
Component Inspection (Exhaust Gas Pressure Sensor)
INFOID:0000000010289832
1.
CHECK EXHAUST GAS PRESSURE SENSOR
1.
Disconnect exhaust gas pressure sensor harness connector.
2.
Check the resistance between exhaust gas pressure sensor terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace exhaust gas pressure sensor.
+
-
Continuity
ECM
Exhaust gas pressure sen-
sor 1
Connector
Terminal
Connector
Terminal
F80
77
F110
3
Existed
78
1
83
2
Exhaust gas pressure sensor
Resistance (Approx.)
+
-
Terminal
2
1
100 k
Ω
P0471 EXHAUST GAS PRESSURE SENSOR 1
ECK-245
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
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A
ECK
N
P
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P0471 EXHAUST GAS PRESSURE SENSOR 1
DTC Logic
INFOID:0000000010289833
DTC DETECTION LOGIC
NOTE:
If DTC P0471 is displayed with DTC P0335, P0470, and P2226, perform the trouble diagnosis for DTC
P0335, P0470, and P2226. Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC P0471 can not duplicate.
>> Proceed to
ECK-245, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010289834
1.
CHECK ECM HARNESS CONNECTOR CONNECTIONS
1.
Turn ignition switch OFF.
2.
Check ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK EXHAUST GAS PRESSURE SENSOR 1 HARNESS CONNECTOR CONNECTIONS
Check exhaust gas pressure sensor 1 harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK EXHAUST GAS PRESSURE SENSOR 1 POWER SUPPLY CIRCUIT
Check the power supply of the exhaust gas pressure sensor 1.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform trouble diagnosis for power supply circuit.
4.
CHECK EXHAUST GAS PRESSURE SENSOR 1 CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check exhaust gas pressure sensor 1 circuit for open and short.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0471
PRS UPSTR OF TBN
(Exhaust pressure sensor “A” circuit
range/performance)
• 1.DEF: SIGNAL INCOHERENCE
• 2.DEF: INCORRECT SENSOR
MOUNTING
• Difference between barometric pressure
and exhaust pressure while engine stopped.
• Difference between upstream DPF pressure
and exhaust pressure while engine is run-
ning at idle.
• Exhaust gas pressure sensor 1
• Turbocharger
• Exhaust manifold
• Exhaust tube
• ECM
+
-
Continuity
Exhaust gas pressure sensor 1
Connector
Terminal
F110
3
Ground
Existed
ECK-246
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P0471 EXHAUST GAS PRESSURE SENSOR 1
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
DTC CONFIRMATION PROCEDURES
1.
Erase DTC.
2.
Perform DTC confirmation procedure again. Refer to
Is the DTC P0471 displayed again?
YES
>> GO TO 6.
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
6.
CHECK THE EXHAUST GAS PRESSURE SENSOR 1 FOR LEAK
Visually check the exhaust gas pressure sensor 1 for air leak.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair or replace the malfunctioning part.
7.
CHECK EXHAUST GAS PRESSURE SENSOR 1
ECK-246, "Component Inspection (Exhaust Gas Pressure Sensor 1)"
.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace error-detected parts.
8.
CHECK TURBOCHARGER
Check turbocharger.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace malfunctioning parts.
Component Inspection (Exhaust Gas Pressure Sensor 1)
INFOID:0000000010289835
1.
CHECK EXHAUST GAS PRESSURE SENSOR 1
1.
Disconnect exhaust gas pressure sensor 1 harness connector.
2.
Check the resistance between exhaust gas pressure sensor 1 terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace exhaust gas pressure sensor 1.
+
-
Continuity
ECM
Exhaust gas pressure sen-
sor 1
Connector
Terminal
Connector
Terminal
F80
77
F110
3
Existed
78
1
83
2
Exhaust gas pressure sensor 1
Resistance (Approx.)
+
-
Terminal
2
1
100 k
Ω
P0487 EGR VOLUME CONTROL VALVE
ECK-247
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
G
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M
A
ECK
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P
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P0487 EGR VOLUME CONTROL VALVE
DTC Logic
INFOID:0000000010289836
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 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECK-247, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010289837
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 F80 and F81.
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 F34 and F60.
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
P0487
EGR VLV CMD CIRC
(Exhaust gas recirculation
throttle control circuit “A”/
open)
• 1.DEF: OFFSET IM-
PLAUSIBLE
ECM detects abnormally closed posi-
tion of EGR volume control valve.
• Harness or connectors
• High pressure EGR volume control valve
• Low pressure EGR volume control valve
• High pressure EGR valve position sensor
• Low pressure EGR valve position sensor
• ECM
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