HVAC System (Diagnostics)

• Basic Diagnostic Procedure
  • Procedure
• General Description
  • Caution
  • Inspection
    • Notes
    • Battery
  • Preparation Tool
    • Special Tool
    • General Tool
• Electrical Component Location
  • Location
    • Engine Compartment
    • Compartment
• Control Module I/O Signal
  • Electrical Specification
  • Wiring Diagram
• Diagnostic Chart for Self-Diagnosis
  • Operation
    • Notes
    • A/C Control System Self-Diagnosis
    • Sensor Check Table
    • Operating Mode Table
    • Diagnostic Procedure When Self Diagnosis Using A/C Control Panel Does Not Operate
• Diagnostics with Phenomenon
  • Inspection
    • Notes
    • Symptom Table
  • Diagnostic Procedure With Phenomenon
    • Nothing Is Displayed On The Screen Or Indicators Do Not Illuminate
    • Air Conditioner Does Not Stop Even When The Off Switch Is Pressed. (Vehicles With Fully Automatic Air Conditioner)
    • The Windshield Glass Is Not Cleared Even When The Def Switch Is Pressed. (Vehicles With Fully Automatic Air Conditioner)
    • Cold Air Not Emitted
    • Warm Air Not Emitted
    • Compartment Temperature Is Excessively Lower Than Setting Temperature
    • Compartment Temperature Is Excessively Higher Than Setting Temperature
    • Air Does Not Come Out, Or Airflow Capacity Is Insufficient
      • Notes
      • Auto A/C
      • Manual A/C
    • Air Goes Out Of Control
      • Notes
      • Auto A/C
      • Manual A/C
    • Cold Air Does Not Come Out Even When The A/C Switch Is Pressed. The Glass Cannot Be Defogged. (Compressor Does Not Operate. (Variable))
    • Unable To Switch Suction Vents
    • Unable To Switch Vents
      • Notes
      • Mode door actuator failure
    • Illumination Does Not Come On Or Cannot Dim
• Diagnostic Procedure for Sensors
  • Ambient Sensor
• Subaru Select Monitor
  • Operation
• Read Diagnostic Trouble Code (DTC)
  • Operation
• Clear Memory Mode
  • Operation
• Read Current Data
  • Operation
  • List
• Diagnostic Procedure for Subaru Select Monitor Communication
  • Communication For Initializing Impossible
• List of Diagnostic Trouble Code (DTC)
  • List
• Diagnostic Procedure with Diagnostic Trouble Code (DTC)
  • DTC B1601 In-Vehicle Sensor Short
  • DTC B1602 In-Vehicle Sensor Open
  • DTC B1603 Evaporator Sensor Short
  • DTC B1604 Evaporator Sensor Open
  • DTC B1605 Refrigerant Flow Sensor Circuit Open
  • DTC B1606 Refrigerant Flow Sensor Circuit Short
  • DTC B1607 SUNLOAD Sensor Short
  • DTC B1608 SUNLOAD Sensor Open
  • DTC B1610 AIRMIX Door Actuator Potentiometer Circuit Open (Driver's)
  • DTC B1611 AIRMIX Door Actuator Potentiometer Circuit Short (Driver's)
  • DTC B1612 AIRMIX Door Actuator Lock (Driver's)
  • DTC B1613 AIRMIX Door Actuator Potentiometer Circuit Open (Passenger's)
  • DTC B1614 AIRMIX Door Actuator Potentiometer Circuit Short (Passenger's)
  • DTC B1615 AIRMIX Door Actuator Lock (Passenger's)
  • DTC B1620 Mode Door Actuator Potentiometer Circuit Open
  • DTC B1621 Mode Door Actuator Potentiometer Circuit Short
  • DTC B1622 Mode Door Actuator Lock
  • DTC U0028 Heater Control Panel Communication Error
  • DTC U0001 Can Communication Bus Off
  • DTC U0002 Can Communication Error
  • DTC B1641 Refrigerant Flow Sensor Circuit Short
  • DTC B1642 Refrigerant Flow Sensor Circuit Open
  • DTC B1643 Variable Flow Change Solenoid Duty Circuit Abnormal
  • DTC B1644 Refrigerant Not Sealed Drive Error