Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COOLING FAN (CRANKSHAFT DRIVEN) OPERATION
1. Start engine and let it idle.
2. Make sure that cooling fan (crankshaft driven) operates normally.
  OK or NG
  
  OK (With CONSULT): GO TO 2.
  
  OK (Without CONSULT): GO TO 3.
  
  NG: Check cooling fan (crankshaft driven). Refer to "REMOVAL AND INSTALLATION (CRANKSHAFT DRIVEN TYPE) ".
CHECK COOLING FAN MOTOR OPERATION
With CONSULT
1. Start engine and let it idle.
2. Select "COOLING FAN" in "ACTIVE TEST" mode with CONSULT.
3. Make sure that cooling fan operates.
  OK or NG
  
  OK: GO TO 4.
  
  NG: Check cooling fan control circuit. (Proceed to "PROCEDURE A ".)
CHECK COOLING FAN MOTOR OPERATION
Without CONSULT
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates.
  OK or NG
  
  OK: GO TO 4.
  
  NG: Check cooling fan control circuit. (Proceed to "PROCEDURE A ".)
  
  Fig 1: Checking Cooling Fan Operation
  Courtesy of NISSAN NORTH AMERICA, INC.
CHECK COOLING SYSTEM FOR LEAK
Refer to "INSPECTION ".

OK or NG

OK: GO TO 5.

NG: Check the following for leak.
- Hose
- Radiator
- Radiator cap
- Water pump
- Reservoir tank
CHECK COMPONENT PARTS
Check the following.
- RESERVOIR TANK CAP (Refer to "CHECKING RADIATOR ".)
- Thermostat. (Refer to "REMOVAL AND INSTALLATION ".)
- Water control valve. (Refer to "REMOVAL AND INSTALLATION ".)
- Engine coolant temperature sensor. (Refer to "COMPONENT INSPECTION ".)
  OK or NG
  
  OK: GO TO 6.
  
  NG: Replace malfunctioning component.
CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to "MAIN 13 CAUSES OF OVERHEATING ".

:INSPECTION END