Climate Control System-General Information And Diagnostics

• Specifications
  • General Specifications
  • Torque Specifications
• Description And Operation
  • Climate Control System
    • Notes
    • Principles of Operation
      • Notes
      • Heat Transfer
      • Latent Heat of Vaporization
      • Relative Humidity
      • Effects of Pressure on Boiling or Condensation
      • The Refrigerant Cycle
    • Dual Automatic Temperature Control (DATC) Module Description
    • System Air Flow
      • Auto
      • Off
      • Panel
      • Panel/Floor
      • Floor
      • Floor/Defrost
      • Defrost
• Diagnosis And Testing
  • Climate Control System
    • Notes
    • Inspection and Verification
    • Dual Electronic Automatic Temperature Control (DATC) Module Diagnostic Trouble Codes - DTCs
    • Front Panel DATC Module Self-Test (On-Demand Diagnostic Trouble Codes - DTCs)
    • Front Panel DATC Module Display - Retrieve Continuous Diagnostic Trouble Codes (DTCs)
    • Diagnostic Trouble Code Index
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: No Communication With The Dual Automatic Temperature Control (DATC) Module
        • Normal Operation
        • Possible Causes
        • Pinpoint Test A: No Communication With The Dual Automatic Temperature Control (DATC) Module
      • Pinpoint Test B: The DATC System Is Inoperative, Intermittent or Incorrect Operation
        • Normal Operation
        • Possible Causes
        • Pinpoint Test B: The DATC System Is Inoperative, Intermittent Or Incorrect Operation
      • Pinpoint Test C: Incorrect/Erratic Direction Of Airflow From Outlets
        • Normal Operation
        • Possible Causes
        • Pinpoint Test C: Incorrect/Erratic Direction Of Airflow From Outlets
      • Pinpoint Test D: DTC B1251 OR DTC 1253 - A/C In-Vehicle Temperature Sensor Open Circuit or Short to Ground
        • Normal Operation
        • Possible Causes
        • Pinpoint Test D: DTC B1251 Or DTC1253 - A/C In-Vehicle Temperature Sensor Open Circuit Or Short To Ground
      • Pinpoint Test E: Evaporator Or Heater Core Discharge Air Temperature Sensor Circuit Open Or Short To Ground
        • Normal Operation
        • Possible Causes
        • Pinpoint Test E: Evaporator Or Heater Core Discharge Air Temperature Sensor Circuit Open Or Short To Ground
      • Pinpoint Test F: DTC B1255 OR DTC B1257 - A/C Ambient Temperature Sensor Open Circuit or Short to Ground
        • Normal Operation
        • Possible Causes
        • Pinpoint Test F: DTC B1255 Or DTC B1257 - A/C Ambient Temperature Sensor Open Circuit Or Short To Ground
      • Pinpoint Test G: DTC B1259 OR DTC B1261 - Solar Radiation Sensor Open Circuit or Short to Ground
        • Normal Operation
        • Possible Causes
        • Pinpoint Test G: DTC B1259 Or DTC B1261 - Solar Radiation Sensor Open Circuit Or Short To Ground
      • Pinpoint Test H: Insufficient, Erratic or No Heat
        • Normal Operation
        • Possible Causes
        • Pinpoint Test H: Insufficient, Erratic Or No Heat
      • Pinpoint Test I: Insufficient Heat During Engine Idle
        • Normal Operation
        • Possible Causes
        • Pinpoint Test I: Insufficient Heat During Engine Idle
      • Pinpoint Test J: Full Heat Only In All Modes
        • Normal Operation
        • Possible Causes
        • Pinpoint Test J: Full Heat Only In All Modes
      • Pinpoint Test K: The Dual Temperature Control Is Inoperative/Does Not Operate Correctly
        • Normal Operation
        • Possible Causes
        • Pinpoint Test K: The Dual Temperature Control Is Inoperative/Does Not Operate Correctly
      • Pinpoint Test L: The A/C Does Not Operate/Does Not Operate Correctly
        • Normal Operation
        • Possible Causes
        • Pinpoint Test L: The A/C Does Not Operate/Does Not Operate Correctly
      • Pinpoint Test M: The Air Conditioning (A/C) Is Always On
        • Normal Operation
        • Possible Causes
        • Pinpoint Test M: The A/C Is Always On
      • Pinpoint Test N: The Blower Motor Is Inoperative
        • Normal Operation
        • Possible Causes
        • Pinpoint Test N: The Blower Motor Is Inoperative
      • Pinpoint Test O: The Blower Motor Does Not Operate Correctly
        • Normal Operation
        • Possible Causes
        • Pinpoint Test O: The Blower Motor Does Not Operate Correctly
    • Component Tests
      • Coolant Control Valve
      • Heater Core
        • Notes
        • 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
    • Cleaning
    • Connect
  • Air Conditioning Line (Peanut) Fitting
    • 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
  • A/C Clutch Air Gap Adjustment
  • Manifold Gauge Set Connection
  • Electronic Leak Detection
  • Fluorescent Dye Leak Detection
    • Notes
    • Fluorescent Dye Detection
      • Notes
      • 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 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
  • Air Conditioning (A/C) System Flushing
  • Refrigerant System Filtering Following Air Conditioning (A/C) Compressor Installation
  • Refrigerant Oil Adding
    • Notes
    • Refrigerant Oil Adding
      • Notes
      • 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
    • Notes
    • Refrigerant Identification
    • Contaminated Refrigerant Handling