Nissan Sentra. Instruction — part 412
EC-344
< DTC/CIRCUIT DIAGNOSIS >
[MRA8DE]
P0524 ENGINE OIL PRESSURE
NO
>> Proceed to
.
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
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009758587
1.
CHECK ENGINE OIL LEVEL
1. Turn ignition switch OFF.
2. Check engine oil level. Refer to
.
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
.
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
.
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
E
F
G
H
I
J
K
L
M
A
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
Step
Inspection item
Equipment
Standard
Reference
1
PCV valve
2
Exhaust front tube
Visual
• No blocking
• No abnormal sounds
—
3
Oil pump
4
• Piston
• Piston pin
• Piston ring
• Piston to piston pin oil clearance
• Piston ring side clearance
• Piston ring end gap
5
Cylinder block
• Cylinder block top surface distortion
• Piston to cylinder bore clearance
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
.
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
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
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
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
.
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
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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