Automotive 14 168

The SAE J-1930 standardized name for the sensor that measures the temperature of the air being drawn into the engine is called a(n) ________. Air temperature sensor (ATS) Air charge temperature (ACT) sensor Manifold air temperature (MAT) sensor Intake air temperature sensor (IAT)

Intake air temperature sensor (IAT)

When testing the ECT sensor with the connector disconnected, the technician should select what position on the DMM? AC volts Hz (Hertz) DC volts Ohms

Ohms

When checking the ECT sensor with a scan tool, about what temperature should be displayed if the connector is removed from the sensor with the key on, engine off? 284 degrees F (140 degrees C) -40 degrees F (-40 degrees C) 230 degrees F (110 degrees C) 120 degrees F (50 degrees C)

-40 degrees F (-40 degrees C)

A typical IAT or ECT sensor reads about 3000 ohms when tested using a DMM. This resistance represents a temperature of about ________. 120 degrees F (50 degrees C) -40 degrees F (-40 degrees C) 284 degrees F (140 degrees C) 70 degrees F (20 degrees C)

70 degrees F (20 degrees C)

When testing an ECT sensor on a vehicle, a digital multimeter can be used and the signal wires back probed. What setting should the technician use to test the sensor? DC volts Hz (Hertz) AC volts Ohms

DC volts

If the transmission fluid temperature (TFT) sensor were to fail electrically open (infinity resistance), what would the PCM do to the shifts? Normal shifts and normal operation of the torque converter clutch Delayed shift points and torque converter clutch disabled Disable torque converter clutch; normal shift points Normal shifts but overdrive will be disabled

Delayed shift points and torque converter clutch disabled

The sensor that most determines fuel delivery when a fuel injected engine is first started is the ________. O2S IAT sensor Engine MAP sensor ECT sensor

ECT sensor

A P0118 DTC is being discussed. Technician A says that the ECT sensor could be shorted internally. Technician B says that the signal wire could be open. Which technician is correct? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B

Technician B only

Two technicians are discussing a stepped ECT circuit. Technician A says that the sensor used for a stepped circuit is different than one used in a non-stepped circuit. Technician B says that a stepped ECT circuit uses different internal resistance inside the PCM. Which technician is correct? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B

Technician B only

Two technicians are discussing the IAT sensor. Technician A says that the IAT sensor is more important to the operation of the engine (higher authority) than the ECT sensor. Technician B says that the PCM will add fuel if the IAT indicates that the incoming air temperature is cold. Which technician is correct? Technician A only Technician B only Both Technicians A and B Neither Technician A nor B

Technician B only