Avenger 2008

General Information

Print

ABS Description & Operation



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

This vehicle uses an antilock brake system designated MK25e. Some vehicles are equipped with MK25e antilock brakes only. Other vehicles are equipped with MK25e antilock brakes including Electronic Stability Program (ESP®) and All-Speed Traction Control.

This four-channel antilock brake system uses components of the base brake system, but also features the following components:



Integrated Control Unit (ICU)-Hydraulic Control Unit (HCU) (2) and Antilock Brake Module (ABM) (1).

Click image to see an enlarged view

Fig. Integrated Control Unit (ICU)

 
Wheel Speed Sensors (WSS)-Four sensors (one sensor at each wheel making it a four-channel system).
 

Electronic Stability Program



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

Electronic Stability Program (ESP®), which includes Hydraulic Brake Assist and Traction Control aids the driver in maintaining vehicle directional stability. ESP® will do whatever can be done, within the limits of available traction, to keep the car on course. Hill Start Assist (HSA) is available on some vehicles.

ESP® uses the ABS with Traction Control (MK25E) along with the following components to operate:



Dynamics (ESP®) Sensor
 
Steering Angle Sensor (SAS)
 
Brake Pressure Sensor
 

The Dynamics Sensor includes the Yaw Rate Sensor and the lateral Acceleration Sensor. It is mounted under the center console, which is near the center of gravity of the car for effective sensing.

The Steering Angle Sensor is located in the steering column.

The Brake Pressure Sensor is located in the Hydraulic Control Unit (HCU) and is not serviceable separate from the HCU.

The ESP® default mode is Full-On with every key-on. Pressing the ESP Off button once activates what is referred to as Partial mode. In Partial mode, Traction Control is deactivated and ESP® operates at a higher threshold, therefore, it will not come on as aggressively as in the Full-On mode. The system can be returned to -normal- Full-On mode by pressing and releasing the ESP Off switch. The ESP function lamp is illuminated in the cluster whenever the ESP system is turned off.

Electronic Variable Brake Proportioning (EVBP)



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

Vehicles equipped with ABS use Electronic Variable Brake Proportioning (EVBP) to balance front-to-rear braking. The EVBP is used in place of a rear proportioning valve. The EVBP system uses the ABS system to control the slip of the rear wheels in partial braking range. The braking force of the rear wheels is controlled electronically by using the inlet and outlet valves located in the Integrated Control Unit (ICU).

Hill Start Assist



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

The Hill Start Assist (HSA) system is designed to assist the driver when starting a vehicle from a stop on a hill by maintaining the level of brake pressure the driver applied for a short time period after the driver takes his foot off of the brake pedal. Pressure is released as the vehicle starts to move.

Hydraulic Brake Assist



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

Brake Assist is programmed into the ESP® system. Brake assist helps the driver overcome the tendency to not apply the brakes hard enough or quick enough to achieve the minimum stopping distance during a panic stop. During this situation, the ESP® system instantly applies the maximum available pressure to the brakes and the vehicle stops as quickly as available traction will allow.

Traction Control



Specific to:

Chrysler Sebring 2008-2009

Dodge Avenger 2008-2009

The traction control system that is part of the Electronic Stability Program (ESP®), is an all-speed traction control. All-Speed Traction Control enhances mobility and prevents wheel slip when accelerating on slippery surfaces. It also provides a measure of directional stability control. Using the wheel-speed sensors, it can detect excessive yaw and help keep the car on the intended course, as for instance, when accelerating around a curve.

All-Speed Traction Control is effective up to 85 mph (137 km/h).

The traction control system may be turned off or on by depressing the ESP Off switch button located in the accessory switch bank module located in the instrument panel center bezel.

 
label.common.footer.alt.autozoneLogo