Answer:B) Technician B
Explanation:ECT(ENGINE COOLANT TEMPERATURE) is a sensor present in the coolant Temperature sensor that checks and transmits the Temperature to the ECM(engine control module). This helps to regulate the fueling time, speed and other factors that can impact the Temperature of the engine.
Stepped ECT circuits require different Internal resistance inside the PCM(power-train control module) is a combined control which includes the ECU(ENGINE CONTROL UNIT) AND TCU(TRANSMISSION CONTROL UNIT). The same sensor can be used for both the stepped circuit and a circuit that is not stepped.