1.CHECK COOLING FAN OPERATION
With CONSULT-III
Turn ignition switch ON.
Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.
Check that cooling fan speed varies according to the percentage.
Without CONSULT-III
Perform IPDM E/R auto active test and check cooling fan motors operation, refer to
Diagnosis Description
.
Check that cooling fan operates.
Is the inspection result normal?
YES
>>
GO TO 2
.
NO
>>
Go to
Diagnosis Procedure (GT-R certified NISSAN dealer)
.
2.CHECK COOLING SYSTEM FOR LEAK-I
Check cooling system for leak. Refer to
Inspection
.
Is leakage detected?
YES
>>
GO TO 3
.
NO
>>
GO TO 4
.
3.CHECK COOLING SYSTEM FOR LEAK-II
Check the following for leak.
Hose
Radiator
Radiator cap
Water pump
>>
Repair or replace malfunctioning part.
4.CHECK RESERVOIR TANK CAP
Check reservoir tank cap. Refer to
Inspection
.
Is the inspection result normal?
YES
>>
GO TO 5
.
NO
>>
Replace reservoir tank cap.
5.CHECK THERMOSTAT
Check thermostat. Refer to
Inspection (GT-R certified NISSAN dealer)
.
Is the inspection result normal?
YES
>>
GO TO 6
.
NO
>>
Replace thermostat
6.CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to
Component Inspection (GT-R certified NISSAN dealer)
.
Is the inspection result normal?
YES
>>
GO TO 7
.
NO
>>
Replace engine coolant temperature sensor.
7.CHECK MAIN 12 CAUSES
If the cause cannot be isolated, check the following.
Engine
Step
Inspection item
Equipment
Standard
Reference page
OFF
1
Blocked radiator
Blocked condenser
Blocked radiator grille
Blocked bumper
Visual
No blocking
—
2
Coolant mixture
Coolant tester
Anti-Freeze Coolant Mixture Ratio
3
Coolant level
Visual
Coolant up to MAX level in reservoir tank and radiator filler neck
Inspection
4
Reservoir tank cap
Pressure tester
Inspection
ON*
2
5
Coolant leaks
Visual
No leaks
Inspection
ON*
2
6
Thermostat
Touch the upper and lower radiator hoses
Both hoses should be hot
Inspection (GT-R certified NISSAN dealer)
ON*
1
7
Cooling fan
CONSULT-III
Operating
Component Function Check (GT-R certified NISSAN dealer)
OFF
8
Combustion gas leak
Color checker chemical tester 4 Gas analyzer
Negative
—
ON*
3
9
Coolant temperature gauge
Visual
Gauge less than 3/4 when driving
—
Coolant overflow to reservoir tank
Visual
No overflow during driving and idling
Inspection
OFF*
4
10
Coolant return from reservoir tank to radiator
Visual
Should be initial level in reservoir tank
Inspection
OFF
11
Cylinder head
Straight gauge feeler gauge
0.1 mm (0.004 in) Maximum distortion (warping)
Inspection (GT-R certified NISSAN dealer)
12
Cylinder block and pistons
Visual
No scuffing on cylinder walls or piston
Inspection (GT-R certified NISSAN dealer)
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (56 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to
Troubleshooting Chart (GT-R certified NISSAN dealer)
.
>>
INSPECTION END