Powertrain Electronics Assessment

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  1. 1. Technician A states that the voltage PID for a sensor that uses a pullup circuit should go high if the sensor is unplugged. Technician B says the voltage PID for a sensor that uses a pullup circuit should go low if the sensor is unplugged. Who is correct?

  2. 2. A technician suspects that a 3-wire sensor has a wiring or module problem and finds the following. What is the most likely fault?

    Powertrain 3 wire sensor

  3. 3. The illustration below shows a circuit being tested for what?

    Powertrain Circuit Testing

  4. 4. A Variable Reluctance sensor can be tested for what two values with a DMM?

  5. 5. Technician A states that a voltage divider circuit can be used to represent information. Technician B states that a voltage divider circuit is often used as a high-side driver. Who is correct?

  6. 6. A PCM high side driver:

  7. 7. In this simple circuit, the voltage drop across the bulb is very high but does not equal the total voltage rise. What does this indicate?

    Powertrain Simple Cicuit

  8. 8. A technician is testing a driver circuit as shown. What should the meter read with a good module?

    Powertrain driver circuit

  9. 9. All these are factors that affect the resistance of an electrical conductor EXCEPT:

  10. 10. Technician A states that if a 5V REF signal to a sensor is shorted to ground, the ECU will be damaged. Technician B states that the module may need reprogramming if this happens. Who is correct?

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