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.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 452 (AIR CONDITIONING SYSTEM - DIAGNOSTICS)
2004 Toyota Matrix XR, FWD, Standard
Section 452 (Air Conditioning System - Diagnostics)
2004 Toyota Matrix XR, FWD, StandardSECTION Section 452 (Air Conditioning System - Diagnostics)
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- Service Precautions
- How To Proceed With Troubleshooting
- Customer Problem Analysis Check
- Pre-Check
- Diagnostic Trouble Code Chart
- Terminals Of Ecu
- Problem Symptoms Table
- Circuit Inspection
- DTC 11: Room Temperature Sensor Circuit
- DTC 12: Ambient Temperature Sensor Circuit
- DTC 13: Evaporator Temperature Sensor Circuit
- DTC 14: Engine Coolant Temperature Sensor Circuit
- DTC 21: Solar Sensor Circuit
- DTC 22: Compressor Lock Sensor Circuit
- DTC 23: Pressure Switch Circuit
- DTC 31 & 41: Air Mix Damper Position Sensor Circuit
- DTC 32 & 42: Air Inlet Damper Position Sensor Circuit
- DTC 33 & 43: Air Outlet Damper Position Sensor Circuit
- DTC 41: Air Mix Control Servomotor Circuit
- DTC 42: Air Inlet Control Servomotor Circuit
- DTC 43: Air Outlet Damper Control Servomotor Circuit
- IG Power Source Circuit
- Back Up Power Source Circuit
- Heater Main Relay Circuit
- Blower Motor Circuit
- Compressor Circuit
- Water Pump Circuit
- Converter Circuit
- PTC Heater Circuit (Quick Heater)
- PTC Heater Circuit (Heater Radiator)
- Radiator Fan And Condenser Fan Circuit
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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.