Nissan Qashqai J11. Manual — part 453
ECK-372
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P2452 DIESEL PARTICULATE FILTER PRESSURE SENSOR
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
ECK-399, "Removal and Installation"
.
NO
>> INSPECTION END
+
+
Continuity
ECM
DPF differential pressure
sensor
Connector
Terminal
Connector
Terminal
F80
53
F11
1
Existed
58
2
+
+
Continuity
ECM
DPF differential pressure
sensor
Connector
Terminal
Connector
Terminal
F80
80
F11
3
Existed
P2504 CHARGING SYSTEM VOLTAGE
ECK-373
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
G
H
I
J
K
L
M
A
ECK
N
P
O
P2504 CHARGING SYSTEM VOLTAGE
DTC Logic
INFOID:0000000010518128
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
ECK-374, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010624110
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
ECK-374
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
P253F ENGINE OIL DETERIORATED
P253F ENGINE OIL DETERIORATED
DTC Logic
INFOID:0000000010290047
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 and wait at least 10 seconds.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECK-375, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010290048
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
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> Drain or refill engine oil. Refer to
.
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
P2688 FUEL HEATER
ECK-375
< DTC/CIRCUIT DIAGNOSIS >
[K9K]
C
D
E
F
G
H
I
J
K
L
M
A
ECK
N
P
O
P2688 FUEL HEATER
DTC Logic
INFOID:0000000010290051
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 at least 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Proceed to
ECK-376, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010290052
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check that the following fuse is not fusing.
Is the fuse fusing?
YES
>> Replace the fuse after repairing the applicable circuit.
NO
>> GO TO 2.
2.
CHECK FUEL HEATER RELAY POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Remove fuel heater relay.
3.
Turn ignition switch ON.
4.
Check the voltage between fuel heater relay harness connector and ground.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P2688
—
(Fuel supply heater control
circuit low)
• CC.0: SHORT CIRCUIT
TO EARTH
• CC.1: SHORT-CIRCUIT
TO +12V
• CO: OPEN CIRCUIT
• ECM detects fuel heater circuit is open.
• ECM detects fuel heater circuit is short
to ground.
• ECM detects fuel heater circuit is short
to battery.
• Harness or connectors
(Fuel heater relay circuit is open or short-
ed.)
• Fuel heater relay
Fuse No.
Capacity
#4
10 A
#44
20 A
+
−
Voltage
Fuel heater relay
Connector
Terminal
F164
1
Ground
Battery voltage
3
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