Intro Computer Automotive Test 2

Intro Computer Automotive Test 2 Many modules require reference to rotational speed when calculating output commands. All the following are examples of speed sensors used to create input signals EXCEPT one. A. Crankshaft position (CKP) sensor used for engine speed reference B. Vehicle Speed Sensors (VSS) used for a vehicle speed reference C. Wheel Speed Sensors (WSS) used for individual wheel speeds D. Camshaft Position (CMP) sensor used by the TCM for engine speed - D. Camshaft Position (CMP) sensor used by the TCM for engine speed All of the following are type of speed sensors EXCEPT one A. Variable reluctance B. Thermistor C. Hall-effect D. Optical - B. Thermistor Technician A says the reference to engine speed can be obtained off the rotational speed of the distributor shaft or crankshaft. Technician B says speed sensors are variable reluctance, Hall- effect, or optical type sensors. Who is right? - Both A and B are correct Variable reluctance speed sensors produce what type of voltage signal? - An analog AC voltage signal that varies in frequency Of the speed sensors listed below, which one produces a voltage signal without the use of an outside power(voltage) source? A. Variable reluctance B. Hall-effect C .Optical D. Potentiometer - A. Variable reluctance Technician A says variable reluctance sensors produce a repeating analog AC voltage signal that is counted in relation to time. Technician B says many variable reluctance speed sensors have a stationary permanent magnet pickup coil assembly and a rotating toothed iron wheel. Who is right? - Both A and B are correct All of the following are needed to generate a voltage signal through the principles of electro- magnetic induction EXCEPT one. A. A power source feeding a reference voltage to the sensor B. A conductor for the current flow and voltage to be induced into C. Magnetic lines of force used to induce the current flow and voltage D. Movement between the magnetic lines of force and the conductor - A. A power source feeding a reference voltage to the sensor All the following statements about a variable relucted speed sensor and electro-magnetic induction (EMI) are true EXCEPT one A. The pick-up coil is the conductor needed for EMI B. The permanent magnet provides the magnetic field for EMI C. A rotating toothed iron wheel causes the magnetic field to build up and break down across the pick-up coil (movements needed for EMI) D. EMI induces a digital DC voltage signal in the pick-up coil - D. EMI induces a digital DC voltage signal in the pick-up coil Technician A says some variable reluctance sensors use an iron tone wheel with outward pointing teeth. Technician B says some variable reluctance sensors use an iron drum with slotted holes. Who is right? - Both A and B are correct Technician A says variable reluctance speed sensors must generate a voltage signal with enough amplitude (strength) or the computer will not recognize it. Technician B says variable reluctance sensors produce AC voltage signal that switches rapidly from positive to negative voltage level. Who is right? - Both A and B are correct All of the following are diagnostic test procedures that can be performed on a variable reluctance sensor EXCEPT one. A. The pick-up coil's resistance in ohms can be measured using a DMM B. The generated DC voltage can be measured using a DMM C. The generated AC voltage can be measured using A DMM D. The generated AC voltage trace pattern can be captured and analyzed using DSO - B. The generated DC voltage can be measured using a DMM All the following problems can cause a variable reluctance sensor to produce a weak unrecognizable voltage signal EXCEPT one A. A high resistance fault in the computer's