if you read the scan codes on the vehicle and U0121 was standa for lost communication with antilock brake system module
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if you read the scan codes on the vehicle and U0121 was standa for lost communication with antilock brake system module.
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- Besides indicating ABS faults for some systems, the red brake warning lamp on the instrument panel can indicate failure of the ___ brakesystem, application of the ___ brake, or low fluidlevel in the ___.Technician A says that each ABS has its own diagnostic procedure involving use of the brake and antilock warning lamps, special testers, breakout boxes, scan tools, troubleshooting charts, and wiring diagrams. Technician B says that ABSs vary in the number of codes they can store and whether they will retain the code in memory when the ignition is turned off. Who is correct? Technician A only Technician B only Both A and B Neither A nor BThe purpose of the master cylinder is to. generate the hydraulic pressure needed to apply the brake mechanisms automatically pump the brakes during panic stops apply braking power when wheel slippage occurs all of the above
- While discussing the fail-safe function: Technician A says that the 4WS indicator light is illuminated during the fail-safe function. Technician B says that the rear wheels steer normally when the 4WS control unit enters the fail-safe mode. Who is correct?Which of the following statements about drum brakeshoes is not true?a. Web thickness varies only with changes in shoesize.b. Many shoes have indented places along the edgeof the rim.c. The shoe rim is welded to the web.d. The primary/leading shoe is typically the one thatis positioned toward the front of the vehicleQuestion 02: Discuss the types of brakes along with their figures. Compare disc and drum brakes by discussing which one is effective and why?
- Technician A says that some antilock brake systems use a lateral acceleration sensor in addition to the wheel-speed sensors. Technician B says that traction control systems apply one wheel brake to get the vehicle going in the direction in which it is being steered. Who is correct? Technician A only Technician B only Both A and B Neither A nor BExplain the operation of an integral drum brake parking brake.With the aid of a diagram explain the function of the main parts of a master cylinderused in hydraulic braking system