HVAC Control System - General Information

• Specifications
  • General Specifications
  • Torque Specifications
• Description And Operation
  • Climate Control System
    • Notes
    • Operation
    • Heat Transfer
    • Latent Heat of Vaporization
    • Relative Humidity
    • Effects of Pressure on Boiling or Condensation
    • Compressor Anti-Slugging Strategy
    • The Refrigerant Cycle
    • Clutch Cycling Orifice Tube Type Refrigerant System
    • System Airflow Description
      • Max A/C
      • Panel
      • Off
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
      • A/C Electrical Components
• Diagnosis And Testing
  • Climate Control System
    • Special Tool(s)
      • Notes
      • Vacuum Schematic - Manual A/C
      • Vacuum Connector End View - Manual A/C
      • Vacuum Application Chart
    • Inspection and Verification
    • Powertrain Control Module (PCM) Diagnostic Trouble Code (DTC) Index
    • Instrument Cluster Diagnostic Trouble Code (DTC) Index
    • FEM Diagnostic Trouble Code (DTC) Index
    • REM Diagnostic Trouble Code (DTC) Index
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: No Communication With The Front Electronic Module (Fem)-Unable To Carry Out The Front Electronic Module (Fem) Self-Test
      • Pinpoint Test B: No Communication With The Rear Electronic Module (Rem)-Unable To Carry Out The Rear Electronic Module (Rem) Self-Test
      • Pinpoint Test C: No Communication With The Hybrid Electronic Instrument Cluster (HEC)-Unable To Carry Out The Hybrid Electronic Instrument Cluster (HEC) Self-Test
      • Pinpoint Test D: Incorrect/Erratic Direction Of Airflow From Outlet
      • Pinpoint Test E: Insufficient, Erratic Or No Heat
      • Pinpoint Test F: The A/C Does Not Operate Or Does Not Operate Correctly
      • Pinpoint Test G: The A/C Is Always On
      • Pinpoint Test H: No Operation In All Temperature Settings
      • Pinpoint Test I: The Blower Motor Does Not Operate/Does Not Operate Correctly
      • Pinpoint Test J: The Blower Motor Operates Continuously In High Speed
      • Pinpoint Test K: No Operation In High Blower Setting
      • Pinpoint Test L: No Operation In Lower Speeds
      • Pinpoint Test M: The Auxiliary Blower Motor Does Not Operate/Does Not Operate Correctly
      • Pinpoint Test N: The Auxiliary Blower Motor Does Not Operate Using The Rear Auxiliary Blower Motor Switch
      • Pinpoint Test O: The Panel/Floor Controls Do Not Operate Using The Front/Rear Auxiliary Climate Controls
      • Pinpoint Test P: The Temperature Controls Do Not Operate Using The Front/Rear Auxiliary Climate Controls
      • Pinpoint Test Q: The Panel/Floor And Cool/Warm Controls Do Not Operate Using The Front/Rear Auxiliary Controls
      • Pinpoint Test R: The Panel/Floor And Cool/Warm Controls Do Not Operate/Do Not Operate Correctly When Using The Rear Auxiliary Controls
  • Component Tests
    • Heater Core
    • Heater Core - Plugged
    • Heater Core - Pressure Test
    • Heater Core - Bench Test
    • A/C Evaporator/Condenser Core - On-Vehicle Leak Test
    • A/C Compressor - External Leak Test
• General Procedures
  • Air Conditioning (A/C) System Check - Retail Procedure
    • Notes
    • Visual inspection
    • A/C refrigerant analysis
    • Air conditioning system check
    • Refrigerant system leak test
  • Spring Lock Coupling
    • Special Tool(s)
    • Disconnect
    • Cleaning
    • Connect
  • Air Conditioning Line (Peanut) Fitting
    • Disconnect
    • Connect
  • Heater Hose Coupling
    • Special Tool(s)
    • Disconnect
    • Connect
  • Refrigerant System Tests
  • Air Conditioning (A/C) Clutch Air Gap Adjustment
  • Manifold Gauge Set Connection
  • Electronic Leak Detection
  • Fluorescent Dye Leak Detection
    • Special Tool(s)
    • Fluorescent Dye Detection
    • Fluorescent Dye Injection - Using an A/C Refrigerant Center and Dye Injector
    • Fluorescent Dye Injection - Using a Dye Injector Loop Kit
  • Air Conditioning (A/C) System Flushing
  • Air Conditioning (A/C) System Recovery, Evacuation and Charging
    • Special Tool(s)
    • Refrigerant System Recovery
    • Refrigerant System Evacuation
    • Refrigerant System Charging
  • Refrigerant System Filtering Following Air Conditioning (A/C) Component Installation
  • Refrigerant Oil Adding
  • Inspection and Assembly Requirements - Following an A/C Compressor Failure
  • Refrigerant Identification Testing
  • Contaminated Refrigerant Handling
  • Vacuum Hose Repair - Mini-Tube