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 400 (2002 AIR CONDITIONING)ROOM TEMPERATURE SENSORINSPECTION

2004 Toyota Matrix XR, FWD, Standard

Room Temperature Sensor: Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection

WARNING: This page is about a different car, the 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

Remove Lower Finish Panel
1. Remove the 3 screws.
2. Release the 3 claws and pull out the lower finish panel.
Remove Room Temperature Sensor
1. Disconnect the connector and aspirator hose.
2. Release the 2 claws and pull out the sensor.
  
  Fig 1: Removing Room Temperature Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Inspect Room Temperature Sensor Resistance
Measure resistance between terminals at each temperature as shown in the chart.

Fig 2: Reviewing Room Temperature Sensor Resistance Information
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance is not as specified, replace the sensor.

Fig 3: Inspecting Room Temperature Sensor Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Install Room Temperature Sensor
1. Install the sensor and fit the 2 claws.
2. Connect the aspirator hose and connector.
Install Lower Finish Panel
1. Install the lower finish panel and fit the 3 claws.
2. Install the 3 screws.
Fig 4: Installing Room Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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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.