Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Acura 3.2TL BaseFACTORY OEM SERVICE PROCEDURE
Automatic A/C System
- Special Tools
- Component Location Index
- A/C Service Tips And Precautions
- A/C Refrigerant Oil Replacement
- General Troubleshooting Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- Circuit Diagram
- DTC Troubleshooting
- Notes
- DTC indicator light A: An Open in the In-car Temperature Sensor Circuit
- DTC indicator light B: A Short in the In-car Temperature Sensor Circuit
- DTC indicator light C: An Open in the Outside Air Temperature Sensor Circuit
- DTC indicator light D: A Short in the Outside Air Temperature Sensor Circuit
- DTC indicator light E: An Open in the Sunlight Sensor Circuit
- DTC indicator light F: A Short in the Sunlight Sensor Circuit
- DTC indicator light G: An Open in the Evaporator Temperature Sensor Circuit
- DTC indicator light H: A Short in the Evaporator Temperature Sensor Circuit
- DTC indicator light I: An Open in the Air Mix Control Motor Circuit
- DTC indicator light J: A Short in the Air Mix Control Motor Circuit
- DTC indicator light K: A Problem in the Air Mix Control Linkage, Door, or Motor
- DTC indicator light L: An Open or Short in the Mode Control Motor Circuit
- DTC indicator light M: A Problem in the Mode Control Linkage, Doors, or Motor
- DTC indicator light N: A Problem in the Blower Motor Circuit
- RECIRCULATION Control Motor Circuit Troubleshooting
- ECT Sensor Circuit Troubleshooting
- Communication Line Circuit Troubleshooting
- Climate Control Power And Ground Circuits Troubleshooting
- Radiator And Condenser Fans Low Speed Circuit Troubleshooting
- Condenser Fan High Speed Circuit Troubleshooting
- Radiator And Condenser Fans High Speed Circuit Troubleshooting
- Condenser Fan Circuit Troubleshooting
- Radiator And Condenser Fans Common Circuit Troubleshooting
- Compressor Clutch Circuit Troubleshooting
- A/C Pressure Switch Circuit Troubleshooting
- In-Car Temperature Sensor Replacement
- In-Car Temperature Sensor Test
- Outside Air Temperature Sensor Replacement
- Outside Air Temperature Sensor Test
- Sunlight Sensor Replacement
- Sunlight Sensor Test
- Evaporator Temperature Sensor Test
- Power Transistor Test
- Power Relay Test
- Air Mix Control Motor Test
- Air Mix Control Motor Replacement
- Mode Control Motor Test
- Mode Control Motor Replacement
- RECIRCULATION Control Motor Test
- RECIRCULATION Control Motor Replacement
- Climate Control Unit Removal And Installation
- Climate Control Unit Bulb Replacement
- Evaporator Removal And Installation
- Evaporator & Expansion Valve Component Replacement
- Dust And Pollen Filter Replacement
- Blower Unit Removal And Installation
- Blower Unit Components Replacement
- Heater Unit/Core Replacement
- Heater Valve Cable Adjustment
- Compressor Replacement
- Compressor Clutch Check
- Compressor Clutch Overhaul
- Compressor Relief Valve Replacement
- Condenser Replacement
- Refrigerant Recovery
- System Evacuation
- System Charging
- Refrigerant Leak Test
- A/C System Tests
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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