FixVault
Home › Nissan-Datsun › 2003 › Sentra SE-R, Standard › Repair and Diagnosis › External Pages › Different car › Section 1217 (Manual Air Conditioner System) › Trouble Diagnosis › Operational Check › Procedure:

Operational Check: Procedure:

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check Blower 
    1. Turn fan control switch to 1-speed.

      Blower should operate on 1-speed.

    2. Then turn fan control switch to 2-speed, and continue checking blower speed until all speeds are checked.
    3. 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: Checking Blower
      G00852588Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Check Discharge Air 
    1. Turn knob to each mode.
      Fig 2: Checking Discharge Air
      G00852589Courtesy 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: Identifying Discharge Air Flow Chart
    G00852590Courtesy of NISSAN MOTOR CO., U.S.A.
  3. 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
    G00852591Courtesy of NISSAN MOTOR CO., U.S.A.
  4. 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
    G00852592Courtesy of NISSAN MOTOR CO., U.S.A.
  5. 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
    G00852593Courtesy of NISSAN MOTOR CO., U.S.A.
  6. 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: Pushing A/C Switch To Turn On Air Conditioner
    G00852594Courtesy of NISSAN MOTOR CO., U.S.A.
About FixVault