Electronic Brake Control - Post

Most cars have a control button that can be used by the driver to disable traction control.

Missing or damaged teeth in the pulse wheel will trigger an ABS fault.

Wheel speed sensors send a different frequency of pulse based upon vehicle speed.

With ABS, most need a computer interface to access DTCs and other applicable data.

The yellow/amber light is the color of light associated with ABS related faults.

All of the above are in the brake control module.

A WSS can be tested electrically for each of the above, with a DVOM.

Burnishing pads will help extend pad life and to reduce potential noise.

Both Techs A and B are correct. Tech A is correct in stating that the purpose of an anti-lock braking system is to prevent the wheels from locking during braking, especially on low-friction surfaces. This system allows the driver to maintain steering control while braking, reducing the risk of accidents. Tech B is also correct in stating that the anti-lock braking system does not guarantee that a vehicle can stop quickly on all road surfaces. Factors such as tire condition, road conditions, and vehicle weight also play a role in stopping distance.

The hydraulic control module is part of the ABS unit/system.

The crank sensor is an input to the ECM and tells it the crank shaft's speed.

Axel grease is not used on braking components.

Both of these tools can be used in different applications to find various ABS related faults.

Both of these tools can be used to test a wheel speed sensor.

Retrieving DTC's should be your first step when there is a yellow/amber ABS warning light. The light will also warn you that there is something wrong that is monitoring by the ABS control module/

The push rod does not create hydraulic force. It is merely an intermediate component, responsible for transferring force to the remaining brake system.

Neither Tech A nor B is correct because using gasoline or kerosene to clean brake system components is not an approved method. Brake system components should be cleaned using specific brake cleaner products that are designed to effectively remove dirt, grease, and brake dust without causing damage to the components or compromising the braking system's performance. Using gasoline or kerosene can be dangerous as they are flammable substances and can leave behind residue that may affect the brake system's functionality.

Double-walled steel lines and rubber hoses are used to carry brake fluid from the master cylinder to the brake units. Double-walled steel lines are durable and provide strength and stability to the brake system, while rubber hoses are flexible and can absorb vibrations and movements. Combining both types of lines ensures a reliable and efficient brake fluid transfer, taking advantage of the strengths of each material.

Tech B is correct. When replacing a brake master cylinder, it should be bench bled before it is placed into the vehicle's brake system. Bench bleeding helps remove any air trapped in the master cylinder before it is installed, ensuring proper brake system function. This is an important step to prevent spongy or ineffective brakes. Tech A's statement is incorrect because bleeding the master cylinder after it is placed in the vehicle's brake system would not effectively remove the air trapped in the cylinder.

When computer controlled, the switch sends the signal to the control module to turn on the brake lights.

All of these sensors are used with electronic stability control.

The vehicle speed sensor and wheel speed sensor can be responsible for inputting vehicle speed to the electronic brake control module.

Some brake control modules can be programmed to the size of the vehicle's tires. Other applications may require replacing the module to match the module's programming to the installed tire size.

We typically do not service a hydraulic unit. It is most often replaced.

The ABS module will not mess with the gearing of the transmission, but will do each of the others listed.

Control units can have anywhere between 2 and 4 channels.

This is true other than the metal plate. That is not part of the assembly.

Always use a star pattern to ensure the wheel is uniformly tightened to the hub.

Both Techs A and B are correct. Proportioning valves do reduce brake pressure to the rear wheels, and they can be either pressure-sensitive or load-sensitive. Load-sensitive proportioning valves specifically adjust the rear brake pressure based on the weight of the vehicle's load. Therefore, both Techs A and B are providing accurate information about proportioning valves.

Self testing is performed every time the vehicle is turned off, then on. The ABS module will act as a proportioning valve in late model vehicles.

Brake fluid is graded by the Department of Transportation based on its pH value. The pH value indicates the acidity or alkalinity of a substance. Brake fluid needs to have a specific pH level in order to maintain its effectiveness in the braking system. If the pH level is too high or too low, it can lead to corrosion and damage to the brake system components. Therefore, the Department of Transportation grades brake fluid based on its pH value to ensure that it meets the necessary standards for safe and efficient braking.

Bleeding on most vehicles with ABS is just like bleeding in non-ABS vehicles, but if air does become trapped in the module, a scan tool will be needed to open the valves and push the fluid through.

DOT 5 fluid is not compatible with ABS modules.

Some traction control systems will reduce engine power by limiting the fuel injector open time.

There can be excessive resistance in the sensor's windings. Wheel speed sensors create the voltage, they are not supplied it.