Nissan Pathfinder. Manual — part 510
EC-346
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0524 ENGINE OIL PRESSURE
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
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000009178253
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 level. Refer to
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check oil pump. Refer to
LU-12, "Removal and Installation"
3.
CHECK EOP SENSOR
Check EOP sensor. Refer to
EC-348, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "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.
Monitor item
Condition
Value
(Approx.)
EOP SENSOR
• Engine oil temperature: 80
°C (176°F)
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Engine speed:
Idle
1,450 mV or more
Engine speed:
2,000 rpm
2,850 mV or more
Monitor item
Condition
Value
(Approx.)
EOP SENSOR
• Engine oil temperature: 80
°C (176°F)
• Selector lever: P or N position
• 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-347
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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EC
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5.
CHECK CAUSE OF ENGINE OIL CONSUMPTION
Check the following item.
>> Repair or replace error-detected parts.
Component Inspection
INFOID:0000000009178254
1.
CHECK EOP SENSOR
1. Turn ignition switch OFF.
2. Disconnect EOP sensor harness connector.
3. Check resistance between EOP sensor connector terminals.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Replace EOP sensor. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Component Parts Loca-
.
Step
Inspection item
Equipment
Standard
Reference
1
PCV valve
2
Exhaust front tube
Visual
• No blocking
• No abnormal sounds
—
3
Oil pump
LU-12, "Removal and Installation"
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
Condition
Resistance
(k
Ω)
+
−
Terminal
1
2
None
4 – 10
3
2 – 8
2
1
4 – 10
3
1 – 3
3
1
2 – 8
2
1 – 3
EC-348
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0603 ECM POWER SUPPLY
P0603 ECM POWER SUPPLY
DTC Logic
INFOID:0000000009178255
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON and wait at least 10 second.
2. Turn ignition switch OFF and wait at least 5 minutes.
3. Turn ignition switch ON, wait at least 10 seconds.
4. Repeat steps 2 and 3 for five times.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178256
1.
CHECK ECM POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the voltage between ECM harness connector terminals.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit.
2.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
PERFORM DTC CONFIRMATION PROCEDURE
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)
ECM back up RAM system does not
function properly.
• Harness or connectors
[ECM power supply (back up) circuit is
open or shorted.]
• ECM
ECM
Voltage
+
–
Connector
Terminal
Connector
Terminal
F51
26
E16
128
Battery voltage
P0603 ECM POWER SUPPLY
EC-349
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
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EC
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1. Turn ignition switch ON.
2. Erase DTC.
3. Perform DTC CONFIRMATION PROCEDURE.
.
Is the 1st trip DTC P0603 displayed again?
YES
>> Replace ECM. Refer to
EC-466, "Removal and Installation"
NO
>> INSPECTION END
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