Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » Heating and Air Conditioning » Testing and Inspection » Initial Inspection and Diagnostic Overview » Inspection And Adjustment » Operational Check » Automatic Air Conditioner  
 
 
  Automatic Air Conditioner  
 

Inspection AND ADJUSTMENT

Operational Check

STEP 1: Check Blower

  1. Turn blower control dial clockwise, blower should operate on low speed.
  2. Continue turning blower control dial clockwise, and continue checking blower speeds until all speeds are checked.
  3. Leave blower on HI speed. If NG, go to See: Component Tests and General Diagnostics\Blower Motor\Diagnosis Procedure\Automatic Air Conditioner.

If OK, continue with next check.

STEP 2: Check Discharge Air

  

  1. Press each mode switch and press DEF ( ) switch.
  2. Each mode position indicator should illuminate.
  3. Confirm that discharge air comes out according to the air distribution table. Refer to See: Description and Operation\Automatic Air Conditioner\System Description.

  

NOTE:
Confirm that the compressor clutch is engaged (audio or visual Inspection) and intake door is in the FRE ( ) position when the DEF ( ) is selected.
Intake door position is checked in the next step.
If NG, go to See: Component Tests and General Diagnostics\Mode Door\Automatic Air Conditioner.
If OK, continue with next check.

STEP 3: Check Recirculation

  

  1. Press REC ( ) switch. Recirculation indicator should illuminate.

  

  1. Press REC ( ) switch a second time.
  2. Listen for intake door position change (you should hear blower sound change slightly). If NG, go to See: Component Tests and General Diagnostics\Air Mix Door\Automatic Air Conditioner.

If OK, continue with next check.

STEP 4: Check Temperature Decrease

  1. Turn the temperature dial counterclockwise to 18C (60F) .
  2. Check for cold air at discharge air outlets. If NG, go to See: Symptom Related Diagnostic Procedures\Automatic Air Conditioner System\Insufficient Cooling\Component Function Check.

If OK, continue with next check.

STEP 5: Check Temperature Increase

  1. Turn the temperature dial clockwise to 32C (90F) .
  2. Check for hot air at discharge air outlets. If NG, go to See: Symptom Related Diagnostic Procedures\Automatic Air Conditioner System\Insufficient Heating.

If OK, continue with next check.

STEP 6: Check AUTO Mode

  1. Press the AUTO switch.
  2. Confirm that the compressor clutch engages (audio or visual Inspection). (Discharge air and blower speed will depend on ambient, in-vehicle and set temperatures.)

If NG, go to See: Component Tests and General Diagnostics\Power Supply And Ground Circuit\Diagnosis Procedure\Automatic Air Conditioner, then if necessary, See: Component Tests and General Diagnostics\Magnet Clutch\Component Function Check\Automatic Air Conditioner.
If all operational checks are OK (symptom can not be duplicated), perform tests as outlined to simulate driving condition environment. If symptom appears, refer to See: Symptom Related Diagnostic Procedures\Automatic Air Conditioner System\Symptom Matrix Chart.