HVAC System - Testing And Troubleshooting

• Symptom Troubleshooting Index for Viewer
  • Driver's and passenger's side vent temperatures vary by more than 20°F (11°C)
  • Insufficient Heating
  • The A/C Compressor Clutch And The A/C Condenser/Radiator Fans Are Inoperative, But The Blower And Heater Controls Work
  • The A/C Compressor Clutch Does Not Disengage When The A/C Switch Is OFF
  • The A/C Compressor Clutch Does Not Engage, But The A/C Condenser/Radiator Fans Operate, And The Blower And Heater Controls Work
  • The A/C Compressor Relief Valve Has Vented Refrigerant
  • The A/C Condenser/Radiator Fans Do Not Run At High Speed, But Do Run At Low Speed With The A/C On (2.0 L engine)
  • The A/C Condenser/Radiator Fans Do Not Run At Low Speed With The A/C ON, But The Blower And Heater Controls Work Normally (2.0 L engine)
  • The Blower Fan Runs Slower Than Expected In Cold Weather (When In AUTO Mode)
  • The blower, the heater controls, and the A/C system do not work
• Troubleshooting
  • Climate Control System Symptom Troubleshooting - The A/C Compressor Clutch Does Not Engage, But The A/C Condenser/Radiator Fans Operate, And The Blower And Heater Controls Work
    • Notes
    • Inspection Outline
    • Related Information
    • HDS Function
    • +B_F/M3 Circuit Inspection
    • IG2_OPTION Circuit Inspection
    • A/C_MG_CLUTCH [MG_CLUTCH] Open Wire Inspection
    • A/C_MG_CLUTCH_RLY_CL- [ACC] Open Wire Inspection (2.0 L Engine)
    • A/C_MG_CLUTCH_RLY_CL- Open Wire Inspection (3.0 L Engine)
    • Power Distribution Module Functional Inspection
    • Climate Control Unit Inspection
    • PCM Functional Inspection (2.0 L Engine)
    • PCM Functional Inspection (3.0 L Engine)
    • PCM Inspection
  • Climate Control System Symptom Troubleshooting - The A/C Condenser/Radiator Fans Do Not Run At High Speed, But Do Run At Low Speed With The A/C ON
    • Notes
    • Inspection Outline
    • Related information
    • HDS Function
    • IGP2_SUB [COND_FAN_DIODE-] Circuit Inspection
    • +B_SUB_FAN, SUB_FAN_MOTOR Circuit Inspection
    • FAN_HI_SIGNAL Open Wire Inspection
    • PCM Inspection
  • Climate Control System Symptom Troubleshooting - The A/C Condenser/Radiator Fans Do Not Run At Low Speed With The A/C ON, But The Blower And Heater Controls Work Normally
    • Notes
    • Inspection Outline
    • Related information
    • HDS Function
    • +B_MAIN_FAN, IG2_OPTION [RAD_FAN_DIODE-], MAIN_FAN_MOTOR Circuit Inspection
    • FAN_HI/LO_RLY_COM Open Wire Inspection
    • SUB_FAN_MOTOR, GND Open Wire Inspection
    • FAN_LO_SIGNAL Open Wire Inspection
    • PCM Inspection
  • Climate Control System Symptom Troubleshooting - The Blower, The Heater Controls, And The A/C System Do Not Work
    • Notes
    • Inspection Outline
    • Related Information
    • IG2_OPTION, GND Circuit Inspection
• Description and Operation
  • A/C System Description
  • A/C System Description - Components
  • A/C System Description - System Diagram
  • Rear Window Defogger System Description
  • Rear Window Defogger System Description - System Diagram
• Circuit Diagram
  • Climate Control System Circuit Diagram
  • Rear Window Defogger Circuit Diagram
• Process
  • A/C Diagnostic Process
• Connector View
  • Climate Control Unit Connector for Inputs and Outputs
• Tests
  • A/C Compressor Clutch Check
    • Check
  • A/C Compressor Variable Capacity Control Solenoid Test
    • Test
  • A/C Refrigerant Leak Check
    • Check
  • A/C Refrigerant Oil Adjustment
    • Adjustment
      • Notes
      • 1
      • 2
  • A/C Refrigerant Oil Replacement
    • Notes
    • Replacement
  • A/C Refrigerant Recovery/Evacuation/Charging
    • Notes
    • Procedure
  • A/C System Contamination Inspection
    • Inspection
    • Replacement
  • A/C System Inspection
    • Inspection
  • A/C System Noise Check
    • Check
  • A/C System Test
    • Notes
    • Test
  • Air Mix Control Motor/Mode Control Motor/Recirculation Control Motor Test
    • Test
  • Blower Power Transistor Test
    • Test
  • Drive Belt Auto-Tensioner Inspection (3.0L Engine)
    • Notes
    • Inspection
  • Drive Belt Inspection (3.0L Engine)
    • Inspection
  • Evaporator Temperature Sensor Test
    • Test
  • Heated Steering Wheel Switch Test
    • Test
  • Heated Steering Wheel Temperature Sensor Test
    • Test
  • Humidity/In-Car Temperature Sensor Test
    • Test
  • Outside Air Temperature Sensor Test
    • Test
  • Rear Window Defogger Wire Repair
    • Reconditioning
  • Sunlight Sensor Test
    • Test
• Symptom Troubleshooting Index
  • Climate Control System Symptom Troubleshooting Index
• Component Location Index
  • Climate Control System Component Location Index (2.0L Engine)
  • Rear Window Defogger Component Location Index
• General Information
  • A/C Service Tips and Precautions
    • Notes
    • A/C Label Description