Final answer:
The appropriate EST for performing a resistance test on a potentiometer-type Throttle Position Sensor is a Digital Multimeter (DMM), which measures resistance changes as the throttle position varies.
Step-by-step explanation:
The correct answer is option a) DMM. To perform a resistance test on a potentiometer-type Throttle Position Sensor (TPS), a Digital Multimeter (DMM) is the appropriate Electrical Service Tool (EST). A DMM can help measure the resistance accurately as the throttle position is varied. Using the DMM, one can observe the resistance changes corresponding to the position of the throttle, ensuring the TPS is functioning correctly. A generic HH-EST, PC, or scanner would not provide the specific resistance value needed to perform this test.
The correct answer is option b) generic HH-EST. A potentiometer-type Throttle Position Sensor (TPS) is a variable resistor that measures the position of the throttle valve in an internal combustion engine. To perform a resistance test on this type of sensor, a generic handheld electrical system tester (HH-EST) is appropriate. The HH-EST can measure the resistance of the potentiometer in the TPS to ensure it is within the specified range.