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Section 400 (Engine Control System)
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Engine Coolant Temperature (ECT) Sensor Inspection
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Resistance Inspection
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ECT sensor characteristics graph (reference)
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ECT sensor characteristics graph (reference)
WARNING:
This page is about a different car, the 2005 Mazda RX-8 and 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying ECT Sensor Characteristics Graph
Courtesy of MAZDA MOTORS CORP.