Procedure For Models With A/C

INSPECTION START
Do you have CONSULT-II?

Yes or No

Yes >> GO TO 2.

No >> GO TO 4.
CHECK COOLING FAN LOW SPEED OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT-II and touch "LOW" on the CONSULT-II screen.
3. Make sure that cooling fan operate at low speed.
  OK or NG
  
  OK >> GO TO 3.
  
  NG >> Check cooling fan control circuit. (Go to "PROCEDURE A ".)
  
  Fig 1: CONSULT-II Display - Active Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-II
1. Touch "HIGH" on the CONSULT-II screen.
2. Make sure that cooling fan operate at higher speed than low speed.
  OK or NG
  
  OK >> GO TO 6.
  
  NG >> Check cooling fan control circuit. (Go to "PROCEDURE A ".)
  
  Fig 2: CONSULT-II Display - Active Test
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING FAN LOW SPEED OPERATION
Without CONSULT-II
1. Start engine and let it idle.
2. Turn air conditioner switch ON.
3. Turn blower fan switch ON.
4. Make sure that cooling fan operate at low speed.
  OK or NG
  
  OK >> GO TO 5.
  
  NG >> Check cooling fan low speed control circuit. (Go to "PROCEDURE A ".)
  
  Fig 3: Identifying Cooling Fan
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1. Turn ignition switch OFF.
2. Turn air conditioner switch and blower fan switch OFF.
3. Disconnect engine coolant temperature sensor harness connector.
4. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
5. Restart engine and make sure that cooling fan operate at higher speed than low speed.
  OK or NG
  
  OK >> GO TO 6.
  
  NG >> Check cooling fan high speed control circuit. (Go to "PROCEDURE A ".)
  
  Fig 4: Identifying Engine Coolant Temperature Sensor Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING SYSTEM FOR LEAK
Refer to "ENGINE COOLANT ".

OK or NG

OK >> GO TO 8.

NG >> GO TO 7.
DETECT MALFUNCTIONING PART
Check the following for leak.
- Hose
- Radiator
- Water pump (Refer to "WATER PUMP ".)
  >> Repair or replace.
CHECK RADIATOR CAP
Refer to "RADIATOR ".

OK or NG

OK >> GO TO 9.

NG >> Replace radiator cap.
CHECK COMPONENT PARTS
Check the following:
- Thermostat. (Refer to "WATER PUMP ".)
- Water control valve. (Refer to "WATER OUTLET AND WATER CONTROL VALVE ".)
- Engine coolant temperature sensor. (Refer to "COMPONENT INSPECTION ".)
  OK or NG
  
  OK >> GO TO 10.
  
  NG >> Replace malfunctioning component.
CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to "MAIN 13 CAUSES OF OVERHEATING ".

>> INSPECTION END