1.CHECK COOLING FAN OPERATION With CONSULT-III

1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT-III.
3. Check that cooling fan speed varies according to the percentage.

Without CONSULT-III

1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to Diagnosis Description.
2. 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