HVAC

All Component Locator

• HVAC Components

All Description and Operation

• Air Conditioning (A/C) System Description
• Air Conditioning Evaporator Thermal Expansion Valve Description
• Compressor Description
• Condenser Description
• Evaporator Description
• Handling of Refrigerant Lines and Fittings
• Operating Modes
• Receiver Dehydrator Description
• Refrigerant R-134a

All Special Tools and Equipment

• Special Tools

All Visual Identification

• HVAC Connector End Views

Cleaning, Inspection, and Adjustment

• Compressor Leak Testing

Diagnostic Procedures

• Air Delivery and Temperature Control Check
• Blower Motor Always On
• Blower Motor Inoperative at Any Speed
• Diagnostic Trouble Code (DTC) Clearing
• Diagnostic Trouble Code (DTC) Displaying
• Heating Insufficient
• HVAC Air Delivery System Check
• HVAC Blower Controls System Check
• HVAC Compressor Controls System Check
• Noise Diagnosis

Diagnostic Trouble Codes

• DTC 10 Inside Air Temperature Sensor Voltage Low
• DTC 11 Inside Air Temperature Sensor Open Circuit
• DTC 12 LH Air Outlet Sensor Voltage Low
• DTC 13 LH Air Outlet Sensor Open Circuit
• DTC 14 RH Air Outlet Sensor Voltage Low
• DTC 15 RH Air Outlet Sensor Open Circuit
• DTC 16 Int Air Mix Door Mtr Volts Low/Open Circuit
• DTC 169 Outside Temperature Sensor Voltage Low
• DTC 17 Interior Air Mix Door Motor Voltage High
• DTC 171 Outside Temperature Sensor Open Circuit
• DTC 18 LH Air Mix Door Mtr Volts Low/Open Circuit
• DTC 19 LH Air Mix Door Motor Voltage High
• DTC 20 RH Air Mix Door Mtr Volts Low/Open Circuit
• DTC 21 RH Air Mix Door Motor Voltage High
• DTC 22 Floor Air Mix Dr Mtr Voltage Low/Open CKT
• DTC 23 Floor Air Mix Door Motor Voltage High
• DTC 24 Def Air Mix Door Mtr Volts Low/Open Circuit
• DTC 25 Defrost Air Mix Door Motor Voltage High
• DTC 26 Blower Motor Voltage Low or Open Circuit
• DTC 27 Blower Motor Voltage High
• DTC 27 Blower Motor Voltage Low or Open Circuit
• DTC 28 Air Circ. Valve Voltage Low or Open CKT
• DTC 28 Air Circulation Valve Voltage High
• DTC 29 Air Circ Valve Voltage Low or Open CKT
• DTC 29 Air Circulation Valve Voltage High
• DTC 30 Heating Cut-Off Valve Voltage High
• DTC 30 Heating Cut-Off Valve Volts Low or Open CKT
• DTC 31 Heating Cut-Off Valve Voltage High
• DTC 31 Heating Cut-Off Valve Voltage Low
• DTC 35 A/C Request Signal Voltage High
• DTC 35 A/C Request Signal Voltage Low
• DTC 36 A/C Request Signal Voltage Hi or Open CKT
• DTC 36 A/C Request Signal Voltage Low
• DTC 37 Heater and A/C Control Switch Stuck
• DTC 38 Solar/Twilight Sensor Supply Voltage Low
• DTC 39 Solar/Twilight Sensor Supply Voltage High
• DTC 40 Solar/Twilight Sensor GND Short to Voltage
• DTC 51 Replace Heater and A/C Control
• DTC 52 Heater and A/C Control Not Programmed
• DTC 55 Replace Heater and A/C Control
• DTC 7 Solar/Twilight Sensor Feedback Voltage High
• DTC 8 Solar/Twilight Sensor Feedback Voltage Low
• DTC 9 Solar/Twilight Sensor Feedback Open CKT
• DTC Table

Disassembly, Overhaul, Repair, and Assembly

• Air Conditioning Clutch Coil Installation
• Air Conditioning Clutch Coil Removal
• Clutch Rotor and Bearing Removal
• Clutch Rotor and/or Bearing Install
• Compressor Clutch Plate and Hub Assembly Removal
• Compressor Clutch Plate/Hub Assembly Install
• Compressor Control Valve Assembly Install
• Compressor Control Valve Assembly Removal
• Compressor Pressure Relief Valve Installation
• Compressor Pressure Relief Valve Removal
• Compressor Shaft Seal Install
• Compressor Shaft Seal Removal

Electrical/Electronic Schematic Diagrams

• HVAC Air Delivery/Temperature Control Schematics
• HVAC Blower Control Schematics
• HVAC Compressor Control Schematics
• HVAC Schematic Icons
• HVAC Schematic References

General Diagnostic Information

• Cooling Insufficient - Air Conditioning (A/C) Inoperative
• Intermittents and Poor Connections
• Leak Testing
• Re-Calibrating Actuators After Power Loss
• Scan Tool Diagnostics
• System Performance Test
• TXV Air Conditioning (A/C) System Diagnosis

Mechanical Specifications

• Fastener Tightening Specifications

Removal, Installation, and Replacement

• Air Conditioning (A/C) High Pressure Cut-Out Switch Replacement
• Air Conditioning (A/C) Temperature Sensor Replacement
• Air Conditioning Compressor Hose Replacement
• Air Conditioning Compressor Replacement
• Air Conditioning Condenser Replacement
• Air Conditioning Evaporator Core Replacement
• Air Conditioning Evaporator Thermal Expansion Valve Replacement
• Air Distributor Duct Replacement
• Air Mix Actuator Replacement - Driver
• Air Mix Actuator Replacement - Passenger
• Ambient Temperature Sensor Replacement
• Blower Motor and Fan Replacement
• Condenser Tube Replacement
• Control Assembly Replacement
• Defroster Valve Actuator Replacement
• Discharge Hose Replacement
• Evaporator Tube Extension Replacement
• Evaporator Tube Replacement
• Floor Air Outlet Replacement
• Heater Core Replacement
• Heater Water Valve Replacement
• HVAC Module Assembly Replacement
• Mode Valve Actuator Replacement
• Odor Correction
• Passenger Compartment Air Filter Replacement
• Pressure Cycling Switch Replacement
• Receiver and Dehydrator Replacement
• Refrigerant Recovery and Recharging
• Sun Load Temperature Sensor Replacement
• Temperature Actuator Replacement