Exam 8: Introduction to the Body Computerbody Computer System Diagnosis

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Describe the steps that should be performed prior to flashing the BCM.

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Check the condition of the vehicle's battery.
a. Connect a battery charger and maintain a constant 12 volts at the battery throughout the reprogramming procedure.
b. Use a dedicated computer.
c. Have a subscription.
d. D etermine if the control module actually requires a calibration update.

The NOT gate reverses binary code.

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A transistor that operates as a relay is the basis of the ____ computer.

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D

Explain the function of a multiplexor.

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The ____ is the brain of the computer.

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A stepper motor may have two or four field coils.

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If a malfunction results in improper system operation, the computer may minimize the effects by using ____ action.

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List the precautions necessary to prevent static electricity damage when replacing a control module.

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Most computer-controlled actuators are ____ that convert the output commands from the computer into mechanical action.

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High resistance in the sensor return circuit can cause a faulty input from all sensors that use a shared circuit.

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Flashing a BCM is being discussed. Technician A says a battery charger must be connected to maintain 12 volts during the entire flash procedure. Technician B says that most reprogramming procedures can be reverted to the original programming. Who is correct?

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Technician A says that a PWM actuator cannot be tested with a DMM. Technician B says the PWM actuator may be tested with a lab scope. Who is correct?

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Technician A says when servicing the BCM, a test light should be used to check for voltage. Technician B says before making or breaking electrical connections to the BCM, make sure the ignition switch is off. Who is correct?

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What component contains specific data that pertains to the exact vehicle in which the computer is installed?

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Technician A says the microprocessor commands actuators by output drivers. Technician B says that outputs are never controlled by supplying voltage to the actuator. Who is correct?

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A stepper motor contains a permanent magnet armature.

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What is the purpose of the interface.

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The operation of a computer is divided into four basic functions: ____.

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A(n) ____ is a microprocessor designed to communicate with the BCM.

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Name the components that should be visually inspected before attempting to test the BCM-controlled system.

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