Question: While discussing engine coolant temperature (ECT) sensor diagnosis: Technician A says the ECT sensor resistance should increase as the sensor temperature increases. Technician B says

While discussing engine coolant temperature (ECT) sensor diagnosis: Technician A says the ECT sensor resistance should increase as the sensor temperature increases. Technician B says some computers have internal resistors connected in series with the ECT sensor, and the computer switches these resistors at 120F (49C). Who is correct

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