Section 26 (HVAC - Climate Control System - General Information And Diagnostics)

• Specifications
  • Specification
• Description And Operation
  • Climate Control System
    • Notes
    • System Airflow Description
      • Max A/C
      • Norm A/C
      • Vent
      • Off
      • Floor
      • Mix
      • Defrost
• Diagnosis And Testing
  • Climate Control System
    • Notes
    • Principles of Operation
      • The Refrigerant Cycle
      • Clutch Cycling Orifice Tube Type Refrigerant System
    • Vacuum System
      • Vacuum Schematic
      • Vacuum Connector End View
    • Inspection and Verification
    • DTC Charts
    • Symptom Chart - Climate Control Systems
    • Symptom Chart - NVH
    • Pinpoint Tests
      • Pinpoint Test A: DTC P0645
        • Notes
        • Normal Operation
        • Pinpoint Test A: DTC P0645
      • Pinpoint Test B: Unable to Duplicate the Customer Concern and No DTCs Present
        • Normal Operation
        • PINPOINT TEST B: UNABLE TO DUPLICATE THE CUSTOMER CONCERN AND NO DTCs PRESENT
      • Pinpoint Test C: Incorrect/Erratic Direction of Airflow From Outlets
        • Normal Operation
        • Pinpoint Test C: Incorrect/Erratic Direction Of Airflow From Outlets
      • Pinpoint Test D: Insufficient, Erratic or No Heat
        • Normal Operation
        • Pinpoint Test D: Insufficient, Erratic Or No Heat
      • Pinpoint Test E: The Air Conditioning (A/C) is Inoperative
        • Notes
        • Normal Operation
        • Pinpoint Test E: The Air Conditioning (A/C) Is Inoperative
      • Pinpoint Test F: The Air Conditioning (A/C) is Always On - A/C Compressor Does Not Cycle
        • Notes
        • Normal Operation
        • Pinpoint Test F: The Air Conditioning (A/C) Is Always On - A/C Compressor Does Not Cycle
      • Pinpoint Test G: The Air Conditioning (A/C) is Always On - A/C Mode Always Commanded ON
        • Notes
        • Normal Operation
        • Pinpoint Test G: The Air Conditioning (A/C) Is Always On - A/C Mode Always Commanded On
      • Pinpoint Test H: Insufficient Air Conditioning (A/C) Cooling - Auxiliary System
        • Normal Operation
        • Pinpoint Test H: Insufficient Air Conditioning (A/C) Cooling - Auxiliary System
      • Pinpoint Test I: Temperature Control is Inoperative/Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test I: Temperature Control Is Inoperative/Does Not Operate Correctly
      • Pinpoint Test J: The Blower Motor is Inoperative
        • Notes
        • Normal Operation
        • Pinpoint Test J: The Blower Motor Is Inoperative
      • Pinpoint Test K: The Blower Motor Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test K: The Blower Motor Does Not Operate Correctly
      • Pinpoint Test L: The Auxiliary Blower Motor is Inoperative
        • Notes
        • Normal Operation
        • Pinpoint Test L: The Auxiliary Blower Motor Is Inoperative
      • Pinpoint Test M: The Auxiliary Blower Motor Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test M: The Auxiliary Blower Motor Does Not Operate Correctly
    • Component Tests
      • Blower Motor Resistor
      • Auxiliary Blower Motor Resistor
      • Heater Core
      • Heater Core - Plugged
      • Heater Core - Pressure Test
      • Heater Core - Bench Test
      • Evaporator/Condenser Core - On-Vehicle Leak Test
      • A/C Compressor - External Leak Test
• General Procedures
  • Spring Lock Coupling
    • Notes
    • Disconnect
    • Connect
  • Heater Hose Coupling
    • Notes
    • Disconnect
    • Connect
  • Refrigerant System Tests
    • Notes
    • 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
  • Electronic Leak Detection
  • Fluorescent Dye Leak Detection
    • Notes
    • Fluorescent Dye Injection Using a R-134a Refrigerant Management Machine and Dye Injector - Vehicles Requiring R-134a Addition
    • Fluorescent Dye Injection Using a R-134a Loop/Add On Injector Kit-Set - Vehicles Not Requiring R-134a Addition
    • Fluorescent Dye Detection
  • Air Conditioning (A/C) System Flushing
  • Air Conditioning (A/C) System Recovery, Evacuation and Charging
    • Notes
    • Refrigerant System Recovery
    • Refrigerant System Evacuation Using a R-134a Refrigerant Management Machine
    • Refrigerant System Evacuation Using a R-134a Manifold Gauge Set and Vacuum Pump
    • Refrigerant System Charging Using a R-134a Refrigerant Management Machine
    • Refrigerant System Charging Using a R-134a Manifold Gauge Set and Automatic Refrigerant Charging Meter
  • Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
  • Refrigerant Oil Adding
    • Notes
    • Refrigerant Oil Adding
    • Adding Refrigerant Oil After A/C Compressor Replacement
    • Adding Refrigerant Oil After New Suction Accumulator or Receiver/Drier Replacement
    • Adding Refrigerant Oil After Multiple Component Replacement After A/C System Contamination
    • Oil Injection Using a Dye/Lubricant Injector
  • Refrigerant Identification Testing
    • Notes
    • Refrigerant Identification
    • Contaminated Refrigerant Handling
  • Vacuum Hose Repair - Mini-Tube
  • Air Conditioning (A/C) Odor Treatment