Nissan X-Trail 32. Manual — part 980
P0471 EXHAUST PRESSURE SENSOR
EC-1049
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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P0471 EXHAUST PRESSURE SENSOR
DTC Description
INFOID:0000000010935728
DTC DETECTION LOGIC
POSSIBLE CAUSE
Exhaust gas pressure sensor
FAIL-SAFE
• Boost pressure limitation
• EGR valve is closed position
• Throttle control motor is opened
• CCSL deactivation (considered as abnormal with dashboard message)
• Freeshift inhibited
• CSF regeneration forbidden
• Torque limitation
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P0471 is displayed with DTC P0335, P0470 or P2226, first perform the trouble diagnosis for DTC
P0335, P0470 or P2226.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC P0471 can not duplicate.
>> Proceed to
EC-1049, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010935729
1.
CHECK DTC PRIORITY
If DTC P0471 is displayed with DTC P0335, P0470 or P2226, first perform the trouble diagnosis for DTC
P0335, P0470 or P2226.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
.
NO
>> GO TO 2.
2.
CHECK ECM HARNESS CONNECTOR CONNECTIONS
1.
Turn ignition switch OFF.
2.
Check ECM 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 HARNESS CONNECTOR CONNECTIONS
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0471
PRS UPSTR OF TBN
(Exhaust pressure sensor “A” circuit range/
performance)
• 1.DEF: INCORRECT SENSOR MOUNT-
ING
• 2.DEF: SIGNAL INCOHERENCE
• Difference between barometric pressure and exhaust pressure while en-
gine stopped.
• Exhaust pressure is excessively low while engine is running.
EC-1050
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P0471 EXHAUST PRESSURE SENSOR
Check exhaust gas pressure sensor harness connector connection.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK EXHAUST GAS PRESSURE SENSOR POWER SUPPLY CIRCUIT
Check the power supply of the exhaust gas pressure sensor.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform trouble diagnosis for power supply circuit.
5.
CHECK EXHAUST GAS PRESSURE SENSOR CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check exhaust gas pressure sensor circuit for open and short.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK EXHAUST GAS PRESSURE SENSOR
EC-1048, "Component Inspection (Exhaust Gas Pressure Sensor)"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace error-detected parts.
7.
DTC CONFIRMATION PROCEDURES
1.
Erase DTC.
2.
Perform DTC confirmation procedure again. Refer to
.
Is the DTC P0471 displayed again?
YES
>> GO TO 8.
NO
>> Check intermittent incident. Refer to
GI-44, "Intermittent Incident"
.
8.
CHECK TURBOCHARGER
Check turbocharger.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-44, "Intermittent Incident"
.
NO
>> Repair or replace malfunctioning parts.
Component Inspection (Exhaust Gas Pressure Sensor)
INFOID:0000000010935730
1.
CHECK EXHAUST GAS PRESSURE SENSOR
1.
Disconnect exhaust gas pressure sensor harness connector.
+
-
Voltage
(Approx.)
Exhaust gas pressure sensor
Connector
Terminal
F81
3
Ground
5 V
+
-
Continuity
ECM
Exhaust gas pressure sen-
sor
Connector
Terminal
Connector
Terminal
F118
104
F81
3
Existed
126
1
138
2
P0471 EXHAUST PRESSURE SENSOR
EC-1051
< DTC/CIRCUIT DIAGNOSIS >
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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.
Exhaust gas pressure sensor
Resistance (Approx.)
+
-
Terminal
2
1
100 k
Ω
EC-1052
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P0487 EGR VOLUME CONTROL VALVE
P0487 EGR VOLUME CONTROL VALVE
DTC Description
INFOID:0000000010935731
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors
• High pressure EGR volume control valve
• High pressure EGR valve position sensor
FAIL-SAFE
• EGR valve is closed position
• Throttle control motor is opened
• Stop closed-loop control
• Freeshift inhibited
• CSF regeneration forbidden
• CCSL deactivation
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
EC-1052, "Diagnosis Procedure"
.
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
.
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010935732
1.
CHECK HIGH PRESSURE EGR VOLUME CONTROL VALVE
Visually check high pressure EGR volume control 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 HIGH PRESSURE EGR VOLUME CONTROL VALVE HARNESS CONNECTOR CONNECTIONS
Check high pressure EGR volume control valve harness connector connection.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0487
EGR VLV CMD CIRC
(Exhaust gas recirculation throttle control
circuit “A”/open)
• 1.DEF: OFFSET IMPLAUSIBLE
ECM detects abnormally closed position of high pressure EGR volume
control valve.
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