Nissan Qashqai J11. Manual — part 555
EC9-376
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P2452 DIESEL PARTICULATE FILTER PRESSURE SENSOR
P2452 DIESEL PARTICULATE FILTER PRESSURE SENSOR
DTC Logic
INFOID:0000000010309399
DTC DETECTION LOGIC
NOTE:
If DTC P2452 is displayed with DTC P0641, P0651 or P0697, first perform the trouble diagnosis for DTC
P0641, P0651 or P0697. Refer to
,
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.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
EC9-376, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010309400
1.
CHECK ECM HARNESS CONNECTOR CONNECTIONS
1.
Turn ignition switch OFF.
2.
Check the ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK DPF (DIESEL PARTICULATE FILTER) DIFFERENTIAL PRESSURE SENSOR HARNESS CON-
NECTOR CONNECTIONS
Check the DPF differential pressure sensor harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK DPF DIFFERENTIAL PRESSURE SENSOR POWER SUPPLY
Check the DPF differential pressure sensor power supply.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P2452
P/FLT DIFF PRS SEN
(Diesel particulate filter
pressure sensor “A” circuit)
• 1.DEF: VOLTAGE TOO
LOW
• 2.DEF: VOLTAGE TOO
HIGH
• An excessively high voltage (more than
4.9 V) from diesel particulate filter pres-
sure sensor is sent to ECM.
• An excessively low voltage (less than
0.18 V) from diesel particulate filter
pressure sensor is sent to ECM.
• Harness or connectors
(Diesel particulate filter differential pressure
sensor circuit is open or shorted.)
• Diesel particulate filter differential pressure
sensor
P2452 DIESEL PARTICULATE FILTER PRESSURE SENSOR
EC9-377
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
CHECK DPF DIFFERENTIAL PRESSURE SENSOR POWER SUPPLY AND GROUND CIRCUIT
Check the DPF differential pressure sensor power supply and ground circuit for open and short.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace error-detected parts.
5.
CHECK DPF DIFFERENTIAL PRESSURE SENSOR SIGNAL CIRCUIT
Check the DPF differential pressure sensor signal circuit for open and short.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
REPLACE DPF DIFFERENTIAL PRESSURE SENSOR
Replace DPF differential pressure sensor.
>> GO TO 7.
7.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC Confirmation Procedure.
See
.
Is the DTC P2452 detected again?
YES
>> Replace ECM. Refer to
EC9-405, "Removal and Installation"
NO
>> INSPECTION END
+
-
Voltage
(Approx.)
DPF differential pressure sensor
Connector
Terminal
F120
1
Ground
5.0 V
+
+
Continuity
ECM
DPF differential pressure
sensor
Connector
Terminal
Connector
Terminal
F83
100
F120
1
Existed
117
2
+
+
Continuity
ECM
DPF differential pressure
sensor
Connector
Terminal
Connector
Terminal
F83
122
F120
3
Existed
EC9-378
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P2504 CHARGING SYSTEM VOLTAGE
P2504 CHARGING SYSTEM VOLTAGE
DTC Logic
INFOID:0000000010499345
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 5 seconds.
2.
Check DTC.
Is the DTC detected?
YES
>> Proceed to
EC9-378, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010624055
1.
CHECK DRIVE BELT
Check drive belt. Refer to
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Adjust or replace drive belt.
2.
CHECK CHARGING SYSTEM
Check charging system. Refer to
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Repair or replace error-detected part.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P2504
CHARGING SYSTEM VOLTAGE
(Charging system voltage high)
• 1.DEF: SIGNAL OUTSIDE UPPER
LIMIT
• 2.DEF: SIGNAL OUTSIDE LOWER
LIMIT
• 3.DEF: —
• 4.DEF: MECHANICAL LINKAGE
FAILURE
• 5.DEF: OPERATION TEMPERA-
TURE TOO HIGH
ECM detects poor performance of al-
ternator.
• Harness or connectors
• Alternator
P253F ENGINE OIL DETERIORATED
EC9-379
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
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P253F ENGINE OIL DETERIORATED
DTC Logic
INFOID:0000000010309401
DTC DETECTION LOGIC
NOTE:
If DTC P253F is displayed with DTC P0115, first perform the trouble diagnosis for DTC P0115. Refer to
.
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.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
EC9-379, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010309402
1.
CHECK ENGINE OIL LEVEL
Check the engine oil level. Refer to
.
CAUTION:
If after performed service regeneration, exchange the engine oil and engine oil filter.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Drain or refill engine oil. Refer to
2.
CHECK OIL LEVEL SENSOR
Check oil level sensor. Refer to
MWI-67, "Component Inspection"
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Replace engine oil level sensor. Refer to
EC9-12, "Component Parts Location"
.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P253F
ENG OIL DILUTION
(Engine oil deteriorated)
• 1.DEF: SIGNAL INCOHERENCE
When engine oil is too much quantity.
Too much engine oil
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