Component Description
Electronic Parking Brake (EPB) Module
The EPB module is the electronic control unit for the parking brake system. The EPB module monitors the parking brake switch input and HS-CAN2 messages relating to the parking brake system, then directly controls the parking brake actuator motors. The EPB module also sets Diagnostic Trouble Codes (DTCs) in the event that a system or component failure should occur. For additional information, Refer to: Parking Brake Module .
Parking Brake Actuator Motor
The parking brake actuator motors are single speed reversible electric motors mounted on the rear brake calipers. The motors can be serviced separately from the calipers.
Parking Brake Switch
The parking brake switch is a 3 position switch with 2 sets of 3 internal micro switches, one set is for APPLY and one set is for RELEASE. The 3 switch positions are APPLY (pulled up), NEUTRAL (at rest or static) and RELEASE (pushed down).
Whenever the parking brake switch is disconnected and then reconnected, a DTC sets in the EPB module and the EPB module disables the parking brake system. To restore parking brake system functionality and to clear the DTC, the parking brake switch must be moved through all 3 positions twice within 5 seconds pausing for approximately one-half second when the switch is in the NEUTRAL position between each apply and release.