Operational Check: Procedure:

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Check Blower
1. Turn fan control switch to 1-speed.
2. Blower should operate on 1-speed.
3. Then turn fan control switch to 2-speed, and continue checking blower speed until all speeds are checked.
4. Leave fan control switch on 4-speed.
If NG, go to , "TROUBLE DIAGNOSIS PROCEDURE FOR BLOWER MOTOR ".

If OK, continue with next check.

Fig 1: Turning Fan Control Switch
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Discharge Air
1. Turn knob to each mode.
  
  Fig 2: Turning Knob
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Confirm that discharge air comes out according to the air distribution table.
  Refer to , "DISCHARGE AIR FLOW ".
  
  If NG, go to . "TROUBLE DIAGNOSIS PROCEDURE FOR MODE DOOR ".
  
  If OK, continue with next check.
  
  NOTE: Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH when the DEF mode is selected.
  Confirm that the intake door position is at FRESH when the F/D mode is selected.
  Intake door position is checked in the next step.
  
  Fig 3: Discharge Air Flow Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Recirculation
1. Press REC switch.
  Recirculation indicator should illuminate.
2. Listen for intake door position change (you should hear blower sound change slightly).
  If NG, go to , "TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR ".
  
  If OK, continue with next check.
  NOTE:
  - Recirculation does not operate in DEF and F/D modes.
    
    Fig 4: Pressing REC Switch
    Courtesy of NISSAN MOTOR CO., U.S.A.
Check Temperature Decrease
1. Turn temperature control knob to full cold.
2. Check for cold air at discharge air outlets.
  If NG, go to , "TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT COOLING ".
  
  If OK, continue with next check.
  
  Fig 5: Turning Temperature Control Knob To Full Cold
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Temperature Increase
1. Turn temperature control knob to full hot.
2. Check for hot air at discharge air outlets.
  If NG, go to , "TROUBLE DIAGNOSIS PROCEDURE FOR INSUFFICIENT HEATING ".
  
  Fig 6: Turning Temperature Control Knob To Full Hot
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Air Conditioner Switch
Turn the fan control switch to the desired (1- to 4-speed) position and push the A/C switch to turn ON the air conditioner.

The indicator lamp should come on when air conditioner is ON.

If NG, go to . "TROUBLE DIAGNOSIS PROCEDURE FOR MAGNET CLUTCH ".

Fig 7: Turning Fan Control Switch
Courtesy of NISSAN MOTOR CO., U.S.A.