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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 502 (ENGINE CONTROL SYSTEM)ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTIONINSPECTION OF RESISTANCE
2008 Mazda 6 s Sport, 4D Hatchback, Standard

Inspection of Resistance

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Inspection of Resistance
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Perform the following test only when directed.
  1. Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS .) (See ENGINE COOLANT REPLACEMENT .)
  2. Disconnect the ECT sensor connector.
  3. Remove the ECT sensor.
    Fig 1: Identifying ECT Sensor Connector
    G03637998Courtesy of MAZDA MOTORS CORP.
  4. Place the sensor in water with a thermometer, and heat the water gradually.
    Fig 2: Identifying ECT Sensor Connector Terminals
    G03637999Courtesy of MAZDA MOTORS CORP.
  5. Measure the resistance between the ECT sensor terminals using an ohmmeter.
    • If not as specified, replace the ECT sensor.
    • If ECT sensor is okay, but PID value is out of specification, perform the CIRCUIT OPEN/SHORT INSPECTION .
    Temperature (°C {°F}) Resistance (kilohm)
    20 {68} 2.27-2.74
    80 (176} 0.29-0.34
  6. Reconnect the ECT sensor connector.
    Fig 3: Identifying ECT Sensor Signal Reference Graph
    G03638000Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • 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.