With GST

Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.

If the coolant level in the reservoir tank and/or radiator is below the proper range, skip the following steps and go to "Diagnostic Procedure ".
Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to "Diagnostic Procedure ".
Start engine.
Be careful not to overheat engine.

Fig 1: Proper Coolant Level In The Reservoir Tank
Courtesy of NISSAN MOTOR CO., U.S.A.
Turn air conditioner switch ON.
Turn blower fan switch ON.
Make sure that cooling fan operates at low speed.

Fig 2: Checking Cooling Fan Operation At Low Speed
Courtesy of NISSAN MOTOR CO., U.S.A.

If NG, go to "Diagnostic Procedure ".

If OK, go to the following step.
Turn ignition switch OFF.
Turn air conditioner switch and blower fan switch OFF.
Disconnect engine coolant temperature sensor harness connector.
Connect 150Ω resistor to engine coolant temperature sensor harness connector.
Restart engine and make sure that cooling fan operates at higher speed than low speed.

Fig 3: Checking Cooling Fan Operation At High Speed
Courtesy of NISSAN MOTOR CO., U.S.A.

Be careful not to overheat engine.
If NG, go to "Diagnostic Procedure ".