HVAC Control System - General Information

• Specifications
  • General Specifications
• Description And Operation
  • Climate Control System
    • Notes
    • Principles of Operation
    • Heat Transfer
    • Latent Heat of Vaporization
    • Relative Humidity
    • Effects of Pressure on Boiling or Condensation
    • Compressor Anti-Slugging Strategy (CASS)
    • The Refrigerant Cycle
      • Notes
      • Clutch Cycling Orifice Tube Type Refrigerant System
    • System Airflow Description - Manual Climate Control
      • Max A/C
      • A/C
      • Panel
      • Off
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
    • System Airflow Description - Electronic Automatic Temperature Control
      • Auto
      • Off
      • Panel
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
    • Manual Climate Control System Electrical Components
    • Electronic Automatic Temperature Control System Electrical Components
• Diagnosis And Testing
  • Climate Control System
    • Notes
    • Manual Climate Control Vacuum Schematic
    • Manual Climate Control Vacuum Connector End View
    • Manual Climate Control Vacuum Application Chart
    • Electronic Automatic Temperature Control Vacuum Schematic
    • Electronic Automatic Temperature Control Vacuum Connector End View
    • Electronic Automatic Temperature Control Manual Override Vacuum Application Chart
    • Inspection and Verification
      • Notes
      • Remote Climate Control Module Self-Test
    • Diagnostic Trouble Code (DTC) Indexes
      • Powertrain Control Module Diagnostic Trouble Code (DTC) Index
      • Remote Climate Control Module Diagnostic Trouble Code (DTC) Index
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: DTC B1249 - Blend Door Failure Or Short
      • Pinpoint Test B: DTC B1251 Or DTC 1253 - A/C In-Vehicle Temperature Sensor Open Circuit Or Short To Ground
      • Pinpoint Test C: DTC B1261 - Solar Radiation Sensor Open Circuit Or Short To Ground
      • Pinpoint Test D: DTC U2005 - ACP Communication Error Between Integrated Control Panel And Remote Climate Control Module
      • Pinpoint Test E: No Communication With The Remote Climate Control Module - EATC
      • Pinpoint Test F: The EATC System Is Inoperative, Intermittent Or Incorrect Operation
      • Pinpoint Test G: Incorrect/Erratic Direction Of Air Flow From Outlet - Manual Climate Control
      • Pinpoint Test H: Incorrect/Erratic Direction Of Air Flow From Outlet - EATC
      • Pinpoint Test I: Insufficient, Erratic, Or No Heat - Manual Climate Control And EATC
      • Pinpoint Test J: The A/C Does Not Operate/Does Not Operate Correctly
      • Pinpoint Test K: The A/C Is Always On
      • Pinpoint Test L: No Operation In All Temperature Settings-Manual Climate Control
      • Pinpoint Test M: The Blower Motor Does Not Operate - Manual Climate Control
      • Pinpoint Test N: The Blower Motor Is Inoperative - EATC
      • Pinpoint Test O: The Blower Motor Does Not Operate Correctly - Manual Climate Control
      • Pinpoint Test P: The Blower Motor Operates Continuously In High Speed - Manual Climate Control
      • Pinpoint Test Q: The Blower Motor Operates Continuously In High Speed - EATC
      • Pinpoint Test R: No Operation In High Blower Setting - Manual Climate Control
      • Pinpoint Test S: No Operation In Lower Speeds - Manual Climate Control
      • Pinpoint Test T: No Operation In Some Blower Speeds - EATC
    • 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
  • Air Conditioning Line (Peanut) Fitting
    • Material
    • Disconnect
    • Connect
  • Spring Lock Coupling
    • Special Tool(s)
    • Material
    • Disconnect
    • Cleaning
    • Connect
  • Refrigerant System Tests
    • Special Tool(s)
    • Procedure 1 - Ambient Temperature At or Below 38°C (100°F)
    • Procedure 2 - Ambient Temperature Above 38°C (100°F)
    • Diagnostic Table
  • Air Conditioning (A/C) Clutch Air Gap Adjustment
  • 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
  • Electronic Leak Detection
  • Air Conditioning (A/C) System Flushing
  • Air Conditioning (A/C) System Recovery, Evacuation and Charging
    • Special Tool(s)
    • Material
    • Refrigerant System Recovery
    • Refrigerant System Evacuation Using an R-134a Service Center
    • Refrigerant System Evacuation Using an R-134a Manifold Gauge Set
    • Refrigerant System Charging Using an R-134a Service Center
    • Refrigerant System Charging
  • Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
  • Refrigerant Oil Adding
    • Special Tool(s)
    • Material
    • Refrigerant Oil Adding
    • Refrigerant Oil Adding for New A/C Compressor Installation
    • Refrigerant Oil Adding for New Suction Accumulator or Receiver/Drier Installation
    • Oil Injection Using a Dye/Lubricant Injector
  • Refrigerant Identification Testing
    • Special Tool(s)
    • Refrigerant Identification
    • Contaminated Refrigerant Handling
  • Vacuum Hose Repair - Mini-Tube
  • Air Conditioning (A/C) Odor Treatment
    • Special Tool(s)
    • Material
    • A/C Odor Treatment