Operational Check: Procedure:

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

Check Blower
1. Turn fan control dial to 1-speed. Blower should operate on 1-speed.
2. Then turn fan control dial to 2-speed.
3. Continue checking blower speed until all four speeds are checked.
4. Leave blower on 4-speed.
1. If NG, go to , "BLOWER MOTOR CIRCUIT ".
2. If OK, continue with next check.
  
  Fig 1: Turning Fan Control Dial
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Discharge Air
1. Turn air control dial to each position.
2. Confirm air discharge at all air outlets.
1. If NG, go to , "MODE DOOR MOTOR CIRCUIT ".
2. If OK, continue with next check.
  
  Fig 2: Turning Air Control Dial
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Recirculation
1. Press recirculation switch. Recirculation indicator should light.
2. Listen for intake door position change (you should hear blower sound change slightly).
NOTE: Confirm that the RECIRCULATION (REC) switch is canceled in the FOOT (), D/F () and DEF () modes.
1. If NG, go to , "INTAKE DOOR MOTOR CIRCUIT ".
2. If OK, continue with next check.
  
  Fig 3: Pressing Recirculation Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Temperature Decrease
1. Turn fan control dial to 1-speed.
2. Turn temperature control dial to full cold.
3. Check for cold air at discharge air outlets.
1. If NG, go to , "INSUFFICIENT COOLING ".
2. If OK, continue with next check.
  
  Fig 4: Turning Temperature Control Dial To Full Cold
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Temperature Increase
1. Turn temperature control dial to full hot.
2. Check for hot air at discharge air outlets.
1. If NG, go to . "INSUFFICIENT HEATING ".
2. If OK, continue with next check.
  
  Fig 5: Turning Temperature Control Dial To Full Hot
  Courtesy of NISSAN MOTOR CO., U.S.A.
Check Air Conditioner Switch
Turn fan control dial to the desired (1- to 4-speed) position and push the air conditioner switch (if equipped) to turn ON the air conditioner. The indicator light should come on when air conditioner is ON.

If NG, go to , "A/C SYSTEM ".

If all operational checks are OK (symptom can not be duplicated), go to "Incident Simulation Tests" and perform tests as outlined to simulate driving conditions environment. If symptom appears, refer to , "SYMPTOM TABLE " and perform applicable trouble diagnosis procedures.

Fig 6: Pushing Air Conditioner Switch
Courtesy of NISSAN MOTOR CO., U.S.A.