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 783 (SFI)ENGINE COOLANT TEMPERATURE (ECT) SENSORINSPECTION

2004 Toyota Matrix XR, FWD, Standard

Engine Coolant Temperature (ECT) Sensor: Inspection

2004 Toyota Matrix XR, FWD, StandardSECTION Inspection

WARNING: This page is about a different car, the 2004 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

DRAIN ENGINE COOLANT
REMOVE ECT SENSOR
1. Disconnect the ECT sensor connector.
2. Using SST, remove the ECT sensor and gasket.
  1. SST 09205-76030
  Fig 1: Disconnecting ECT Sensor Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the terminals.
1. Resistance: Refer to the graph
If the resistance is not as specified, replace the ECT sensor.
REINSTALL ECT SENSOR
1. Install a new gasket to the ECT sensor.
2. Using SST, install the ECT sensor.
  1. SST 09205-76030
  2. Torque: 19.6 N.m (200 kgf.cm, 14 ft.lbf)
3. Connect the ECT sensor connector.
REFILL WITH ENGINE COOLANT

RENDER: 1.0x

NO RELATED

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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.