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 

ECK-372, "DTC Logic"

.

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 

EM-274, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Adjust or replace drive belt.

2.

CHECK CHARGING SYSTEM

Check charging system. Refer to 

CHG-15, "Work Flow"

.

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

ECK-201, "DTC 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 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 

LU-35, "Inspection"

.

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 

LU-36, "Draining"

 or 

LU-36, "Refilling"

.

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

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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