Climate Control System - General Information And Diagnostics

• Specifications
  • General Specifications
• Description And Operation
  • Climate Control System
    • Climate Control System
    • Principles of Operation
      • Notes
      • Heat Transfer
      • Latent Heat of Vaporization
      • Relative Humidity
      • Effects of Pressure on Boiling or Condensation
    • Compressor Anti-Slugging Strategy
    • The Refrigerant Cycle
    • Climate Control System Operation
      • Electronic Manual Temperature Control System
      • Electronic Automatic Temperature Control System
      • Auxiliary Climate Control System
    • System Airflow Description - EMTC
      • Max A/C
      • Panel
      • Panel/Floor
      • Off
      • Floor
      • Floor/Defrost
      • Defrost
    • System Airflow Description - EATC
      • Auto
      • Off
      • Panel
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
• Diagnostic Tests
  • Climate Control System
    • Notes
    • Inspection and Verification
    • Electronic Automatic Temperature Control Module - Diagnostic Methods
      • Notes
      • Electronic Automatic Temperature Control Module On-Demand Self Test
      • Electronic Automatic Temperature Control Module - Retrieve Continuous DTCs
      • Electronic Automatic Temperature Control (EATC) Module and Electronic Manual Temperature Control (EMTC) Module Cold Boot Process
    • Diagnostic Trouble Code Index
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: DTC B1251 or DTC B1253 - In-Vehicle Temperature Sensor Open Circuit or Short to Ground
        • Notes
        • Normal Operation
        • Pinpoint Test A: DTC B1251 Or DTC B1253 - In-Vehicle Temperature Sensor Open Circuit Or Short To Ground
      • Pinpoint Test B: DTC B1255 or DTC B1257 - Ambient Temperature Sensor Open Circuit or Short to Ground
        • Notes
        • Normal Operation
        • Pinpoint Test B: DTC B1255 Or DTC B1257 - Ambient Temperature Sensor Open Circuit Or Short To Ground
      • Pinpoint Test C: DTC B2796 or DTC B2795 - LH A/C Solar Radiation Sensor Open Circuit or Short to Ground
        • Notes
        • Normal Operation
        • Pinpoint Test C: DTC B2796 Or DTC B2795 - LH A/C Solar Radiation Sensor Open Circuit Or Short To Ground
      • Pinpoint Test D: DTC B1242 Air Inlet Door Short/Failure
        • Notes
        • Normal Operation
        • Pinpoint Test D: DTC B1242 Air Inlet Door Short/Failure
      • Pinpoint Test E: Incorrect/Erratic Direction of Airflow From Outlet(s)
        • Notes
        • Normal Operation
        • Pinpoint Test E: Incorrect/Erratic Direction Of Airflow From Outlet(S)
      • Pinpoint Test F: The EATC System is Inoperative, Intermittent or Incorrect Operation
        • Notes
        • Normal Operation
        • Pinpoint Test F: The EATC System Is Inoperative, Intermittent Or Incorrect Operation
      • Pinpoint Test G: Insufficient, Erratic or No Heat
        • Normal Operation
        • Pinpoint Test G: Insufficient, Erratic Or No Heat
      • Pinpoint Test H: The Air Conditioning (A/C) is Inoperative/Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test H: The Air Conditioning (A/C) Is Inoperative/Does Not Operate Correctly
      • Pinpoint Test I: The Air Conditioning (A/C) is Always On
        • Notes
        • Normal Operation
        • Pinpoint Test I: The Air Conditioning (A/C) Is Always On
      • Pinpoint Test J: Temperature Control is Inoperative/Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test J: Temperature Control Is Inoperative/Does Not Operate Correctly
      • Pinpoint Test K: The Blower Motor Is Inoperative - EMTC
        • Notes
        • Normal Operation
        • Pinpoint Test K: The Blower Motor Is Inoperative - EMTC
      • Pinpoint Test L: The Blower Motor Does Not Operate Correctly- EMTC
        • Notes
        • Normal Operation
        • Pinpoint Test L: The Blower Motor Does Not Operate Correctly - EMTC
      • Pinpoint Test M: The Blower Motor is Inoperative - EATC
        • Notes
        • Normal Operation
        • Pinpoint Test M: The Blower Motor Is Inoperative - EATC
      • Pinpoint Test N: The Blower Motor Does Not Operate Correctly - EATC
        • Notes
        • Normal Operation
        • Pinpoint Test N: The Blower Motor Does Not Operate Correctly - EATC
      • Pinpoint Test O: The Auxiliary Blower Motor Is Inoperative
        • Notes
        • Normal Operation
        • Pinpoint Test O: The Auxiliary Blower Motor Is Inoperative
      • Pinpoint Test P: The Auxiliary Blower Motor Does Not Operate Correctly
        • Notes
        • Normal Operation
        • Pinpoint Test P: The Auxiliary Blower Motor Does Not Operate Correctly
      • Pinpoint Test Q: The Temperature Control is Inoperative/Does Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
        • Notes
        • Normal Operation
        • Pinpoint Test Q: The Temperature Control Is Inoperative/Does Not Operate Correctly Using The Front/Rear Auxiliary Climate Controls
      • Pinpoint Test R: The Panel/Floor Control is Inoperative/Does Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
        • Notes
        • Normal Operation
        • Pinpoint Test R: The Panel/Floor Control Is Inoperative/Does Not Operate Correctly Using Front/Rear Auxiliary Climate Controls
      • Pinpoint Test S: The Temperature, Panel/Floor and Blower Motor Controls are Inoperative/Do Not Operate Correctly Using the Front/Rear Auxiliary Climate Controls
        • Notes
        • Normal Operation
        • Pinpoint Test S: The Temperature, Panel/Floor And Blower Motor Controls Are Inoperative/Do Not Operate Correctly Using The Front/Rear Auxiliary Climate Controls
      • Pinpoint Test T: DTC B1676 - Battery Voltage Out of Range
        • Notes
        • Normal Operation
        • Pinpoint Test T: DTC B1676 - Battery Voltage Out Of Range
    • Component Tests
      • Resistor - Blower Motor
      • Resistor - Auxiliary Blower Motor
      • Temperature Sensor - In-Vehicle
      • Temperature Sensor - Ambient
      • 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
  • Air Conditioning Line (Peanut) Fitting
    • Disconnect
    • Connect
  • Air Conditioning (A/C) Clutch Air Gap Adjustment
  • Fluorescent Dye Leak Detection
    • Notes
    • 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
  • Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
  • Air Conditioning (A/C) System Recovery, Evacuation and Charging
    • Notes
    • 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 Oil Adding
    • Notes
    • Refrigerant Oil Adding
    • Refrigerant Oil Adding for New A/C Compressor Installation
    • Refrigerant Oil Adding for New Suction Accumulator or Receiver/Drier Installation
    • Refrigerant Oil Adding for Multiple Component Installation After A/C System Contamination
    • Oil Injection Using a Dye/Lubricant Injector
  • Refrigerant Identification Testing
    • Notes
    • Refrigerant Identification
    • Contaminated Refrigerant Handling
  • Air Conditioning (A/C) Odor Treatment
    • Notes
    • A/C Odor Treatment