Infiniti FX35, FX50 (S51). Manual - part 853

P0507 ISC SYSTEM

EC-953

< DTC/CIRCUIT DIAGNOSIS >

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2.

CHECK INTAKE AIR LEAKAGE

1.

Start engine and let it idle.

2.

Listen for an intake air leakage after the mass air flow sensor.

Is intake air leakage detected?

YES

>> Discover air leakage location and repair.

NO

>> GO TO 3.

3.

REPLACE ECM

1.

Stop engine.

2.

Replace ECM.

3.

Perform 

EC-579, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair

Requirement"

.

>> INSPECTION END

EC-954

< DTC/CIRCUIT DIAGNOSIS >

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P0524 ENGINE OIL PRESSURE

P0524 ENGINE OIL PRESSURE

DTC Logic

INFOID:0000000005237423

DTC DETECTION LOGIC

NOTE:
If DTC P0524 is displayed with DTC P0075 or P0081, first perform the trouble diagnosis for DTC P0075,
P0081. Refer to 

EC-766, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING-I

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10 V and 16 V at
idle.

>> GO TO 2.

2.

PRECONDITIONING-II

Check oil level and oil pressure. Refer to 

LU-25, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Go to 

LU-25, "Inspection"

.

3.

PERFORM DTC CONFIRMATION PROCEDURE

 With CONSULT-III

1.

Select “DATA MONITOR” mode with CONSULT-III.

2.

Maintain the following conditions for at least 20 consecutive seconds.

CAUTION:

Always drive at a safe speed.

3.

Check 1st trip DTC.

 With GST

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

DTC No.

Trouble diagnosis name

Detecting condition

Possible cause

P0524

Engine oil pressure too 
low

Engine oil pressure is low because 
there is a gap between angle of target 
and phase-control angle.

• Engine oil pressure or level too low
• Crankshaft position sensor
• Camshaft position sensor
• Intake valve timing control solenoid valve
• Accumulation of debris to the signal pick-up portion 

of the camshaft

• Timing chain installation
• Foreign matter caught in the oil groove for intake 

valve timing control

ENG SPEED

More than 1,700 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

Selector lever

1st or 2nd position

Driving location uphill

Driving vehicle uphill
(Increased engine load will help maintain the driving 
conditions required for this test.)

P0524 ENGINE OIL PRESSURE

EC-955

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> Go to 

EC-955, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237424

1.

CHECK OIL PRESSURE WARNING LAMP

1.

Start engine.

2.

Check oil pressure warning lamp and confirm it is not illumi-
nated.

Is oil pressure warning lamp illuminated?

YES

>> Go to 

LU-25, "Inspection"

.

NO

>> GO TO 2.

2.

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-767, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace malfunctioning intake valve timing control solenoid valve.

3.

CHECK CRANKSHAFT POSITION SENSOR

Refer to 

EC-876, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace crankshaft position sensor.

4.

CHECK CAMSHAFT POSITION SENSOR

Refer to 

EC-881, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning camshaft position sensor.

5.

CHECK CAMSHAFT (INTAKE)

Check the following.
• Accumulation of debris to the signal plate of camshaft front end
• Chipping signal plate of camshaft front end
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Remove debris and clean the signal plate of camshaft

front end or replace camshaft.

6.

CHECK TIMING CHAIN INSTALLATION

Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned?

YES

>> Check timing chain installation. Refer to 

EM-213, "Disassembly and Assembly"

.

NO

>> GO TO 7.

7.

CHECK LUBRICATION CIRCUIT

PBIA8559J

JMBIA0962ZZ

EC-956

< DTC/CIRCUIT DIAGNOSIS >

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P0524 ENGINE OIL PRESSURE

Perform “Inspection of Camshaft Sprocket (INT) Oil Groove”. Refer to 

LU-25, "Inspection"

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Clean lubrication line.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END