Nissan Sentra. Manual - part 412

 

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Nissan Sentra. Manual - part 412

 

 

EC-344

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0524 ENGINE OIL PRESSURE

NO

>> Proceed to 

EC-344, "Diagnosis Procedure"

.

5.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and warm it up to normal operating temperature.

2. Maintain the following conditions for about 10 consecutive seconds.

NOTE:

With engine speed set around 4,000 rpm, the phenomenon can be reproduced more easily.

3. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-344, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758587

1.

CHECK ENGINE OIL LEVEL

1. Turn ignition switch OFF.

2. Check engine oil level. Refer to 

LU-7, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK ENGINE OIL PRESSURE

With CONSULT

1. Turn ignition switch ON.

2. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

3. Start the engine and check that “EOP SENSOR” changes, according to engine speeds.

Without CONSULT

Check engine oil pressure. Refer to 

LU-7, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check oil pump. Refer to 

LU-15, "Removal and Installation"

.

3.

CHECK EOP SENSOR

Check EOP sensor. Refer to 

EC-342, "Component Inspection (EOP Sensor)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Repair or replace error-detected parts.

4.

CHECK ENGINE OIL LEAKAGE

Check engine oil leakage. Refer to 

LU-7, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

Selector lever

P or N (CVT), Neutral (M/T)

Engine coolant temperature

70

°C (158°F) or more

Engine speed

1,000 rpm or more

Monitor item

Condition

Value

(Approx.)

EOP SENSOR

• Engine oil temperature: 80

°C (176°F)

• Selector lever: P or N (CVT), Neutral 

(M/T)

• Air conditioner switch: OFF
• No  load

Engine speed:
Idle

1,450 mV or more

Engine speed:
2,000 rpm

2,850 mV or more

P0524 ENGINE OIL PRESSURE

EC-345

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

C

D

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F

G

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EC

N

P

O

5.

CHECK CAUSE OF ENGINE OIL CONSUMPTION

Check the following item.

>> Repair or replace error-detected parts.

Component Inspection (EOP Sensor)

INFOID:0000000009758588

1.

CHECK EOP SENSOR

1. Turn ignition switch OFF.

2. Disconnect EOP sensor harness connector.

3. Check the resistance between EOP sensor connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EOP sensor. Refer to 

EM-94, "Exploded View"

.

Step

Inspection item

Equipment

Standard

Reference

1

PCV  valve

EC-484, "Inspection"

2

Exhaust front tube

Visual

• No blocking
• No abnormal sounds

3

Oil  pump

LU-16, "Inspection"

4

• Piston
• Piston  pin
• Piston ring

• Piston to piston pin oil clearance
• Piston ring side clearance
• Piston ring end gap

EM-112, "Description"

5

Cylinder block

• Cylinder block top surface distortion
• Piston to cylinder bore clearance

EM-103, "Inspection"

EOP sensor

Resistance (k

Ω)

+

Terminal

1

2

4 – 10

3

2  –  8

2

1

4 – 10

3

1  –  3

3

1

2  –  8

2

1  –  3

EC-346

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

P0603 ECM

P0603 ECM

DTC Logic

INFOID:0000000009758589

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition

switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON and wait at least 1 second.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Repeat step 1 and 2 for 10 times.

4. Turn ignition switch ON.

5. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-346, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758590

1.

CHECK ECM POWER SUPPLY AND GROUND CIRCUIT

Perform trouble diagnosis for ECM power supply and ground circuit. Refer to 

EC-164, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to 

EC-346, "DTC Logic"

.

Is the 1st trip DTC P0603 displayed again?

YES

>> Replace ECM. Refer to 

EC-485, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0603

ECM BACK UP CIRCUIT
[Internal control module keep 
alive memory (KAM) error]

• Malfunction in the internal back up RAM of ECM.
• Malfunction in the internal EEP-ROM system of 

ECM.

• ECM  power  supply
• ECM

P0604 ECM

EC-347

< DTC/CIRCUIT DIAGNOSIS >

[MRA8DE]

C

D

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EC

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P0604 ECM

DTC Logic

INFOID:0000000009758591

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more with ignition

switch ON.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON (engine stopped) and wait least 20 minutes.

CAUTION:

Never start engine during this procedure.

2. Turn ignition switch OFF and wait at least 10 seconds.

3. Turn ignition switch ON.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-347, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009758592

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC confirmation procedure. Refer to 

EC-347, "DTC Logic"

.

Is the 1st trip DTC P0604 displayed again?

YES

>> Replace ECM. Refer to 

EC-485, "Removal and Installation"

.

NO

>> INSPECTION END

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0604

ECM
[Internal control module 
random access memory 
(RAM) error]

Malfunction in the internal RAM of ECM.

ECM

 

 

 

 

 

 

 

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