Base Brake System: Notes

DESCRIPTION 

Courtesy of CHRYSLER GROUP, LLC

The base brake system includes the following components:

1.	Refer to BRAKE ROTOR  - Front.
2.	Refer to DISC BRAKE CALIPER  - Front.
3.	Refer to BRAKE ROTOR  - Rear.
4.	Refer to DISC BRAKE CALIPER  - Rear.
5.	Refer to BRAKE PEDAL ASSEMBLY  .
6.	Refer to HYDRAULIC CONTROL UNIT (HCU)  .
7.	Refer to BRAKE FLUID RESERVOIR  .

The base brake system includes the calipers, brakes lines, brake pads, rotors, HCU and Electronic Brake Booster (EBB) reservoir.

OPERATION 

EPB MENU MODES 

In-Plant and Emissions Rolls Development (ERD) Mode 

The EPB has an In-Plant Mode and Emissions Rolls Development Mode (ERD) where only static EPB switch Apply/Release functions are available along with only text messages related to these two functions activated.

Inspection Mode 

The Inspection Function (IF) allows the EPB system to be tested for certain markets during the required Vehicle Inspection Mode. It automatically detects the tester using wheel speed inputs and runs an apply routine that exercises the EPB for testing. The BSCM detects the vehicle conditions autonomously. If the IF function is canceled or finished, the parking brakes will be released.

The parking brakes will build up a minimum clamp force when applying the EPB switch the first time and the EPB warning light in the IPC will illuminate continuously. Two different methods of increasing the clamp force are available, depending on the usage of the switch:

• The switch can be pulled to the Apply position for the first clamp force step, then released. Each consecutive EPB switch apply will step up the clamp force (executed immediately) until full clamp is achieved.
• If the EPB switch is held in Apply continuously, the function steps up the clamp force every 3 seconds for at least four steps. After the last apply step is reached, a final step will fully apply the parking brakes.

After the last apply step is reached for either method, a final step will fully apply the parking brakes. The parking brakes will be released before radio function exit.

If mode is activated/deactivated through the radio menus. The following conditions must exist:

• Ignition in RUN
• All wheel speeds are valid
• Both front wheel speeds are zero
• Rear wheel speeds are within Min/Max tolerance
• EPB released
• No EPB faults present
• Transmission in neutral
• Throttle not applied

If mode will be inhibited if the following conditions exist:

• Ignition is turned OFF
• One or more wheel speeds become invalid for more than 1 second
• Front wheel speeds become greater then 1 km/h (1 mph) for more than 1 second
• Rear wheel speeds become out of range for more than 1 second
• Throttle is applied
• Transmission is no longer in Neutral

Maintenance Mode 

Maintenance mode allows the EPB spindle nuts to be driven to the spindle beginning. This permits the caliper piston to be pushed into the caliper bore enabling the brake pads to be changed or to perform other caliper service.

Maintenance mode is activated through the radio menus. The following conditions must exist:

• Vehicle stopped
• Ignition in RUN
• EPB released
• EPB switch is not activated
• Brake pedal not pressed

Maintenance mode will be inhibited and the associated message will be displayed for 5 seconds on the radio screen if the following conditions exist:

• Vehicle in motion - Maintenance Mode is not available while vehicle is in motion. 
• Transmission in D/R/L instead of Park/Neutral - Maintenance Mode is not available. Vehicle must be in PARK or Neutral. 
• EPB applied - Maintenance Mode is not available. Release Park Brake. 
• Brake pedal pressed - Maintenance Mode is not available when brake pedal is pressed. 
• EPB switch is activated
• The EPB already in Maintenance mode

To exit Maintenance mode and return the vehicle to normal operating mode, the following conditions must met:

• Vehicle stopped
• Ignition in RUN
• EPB released
• Brake pedal pressed
• EPB switch is activated