Service Information

Volt

Electronic Parking Brake Control Module Scan Tool Information

Table 1:	Parking Brake Control Module Scan Tool Data Parameters
Table 2:	Parking Brake Control Module Scan Tool Output Controls

Parking Brake Control Module Scan Tool Data Parameters

Parameter	Expected Value	Description
*Operating Conditions:* Vehicle in Service Mode, Parking Brake Off
Base Hardware	Varies	The scan tool displays the base hardware number.
BCM Brake Pedal Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the body control module brake pedal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
Calculated System Temperature	Varies	The scan tool displays the parking brake control module temperature in degrees Celsius.
Calibrations	Varies	The scan tool displays the calibration number.
EBCM Emergency Park Brake Enable Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the electronic brake control module emergency park brake enable signal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
ECM Accelerator Pedal Position Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the engine control module accelerator pedal position signal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
ECM Clutch Pedal Position Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the engine control module clutch pedal position signal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
ECM Vehicle Speed Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the engine control module vehicle speed signal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
End Model	Varies	The scan tool displays the end model number.
OS/Software	Varies	The scan tool displays the software number.
Park Brake Calibration Status	Passed	The scan tool displays Passed or Failed. This parameter displays if the park brake calibration is properly programmed into the parking brake control module.
Park Brake Cable Position	1	The scan tool displays 1, 2, or 3. This parameter displays the system cycle value. When the park brake is released 1 will be displayed. When the park brake is applied 3 is displayed. When the park brake is being applied or released 2 is displayed.
Park Brake Motor Command	Off	The scan tool displays On or Off. This parameter displays the status of the park brake motor.
Park Brake Motor Direction	Inactive	The scan tool displays Apply, Release or Inactive. This parameter displays the status of the park brake motor direction.
Park Brake Motor Duty Cycle Command	Varies	The scan tool displays the pulse width modulated cycle as a percentage.
Park Brake Release Reason	None	The scan tool displays None, Ign. Cycled, Spd. Threshold, or Brake Applied. This parameter displays the reason the parking brake was released.
Park Brake Status	Released	The scan tool displays Applied, Released, Malfunction or Invalid. This parameter displays the current status of the parking brake.
Park Brake Switch	Inactive	The scan tool displays Applied, Released, Inactive, or Invalid. This parameter displays the current status of the parking brake switch.
TCM Current Gear Signal	Valid	The scan tool displays Valid or Invalid. This parameter displays the signal status received by the transmission control module current gear signal as valid or invalid. If the signal received is invalid the parking brake control module will deactivate.
VIN	Varies	The scan tool displays the vehicle identification number.

Parking Brake Control Module Scan Tool Output Controls

Output Control	Description
Handbrake Shoe Service Reset	The electric handbrake module will reset the dynamic brake counter. When selected the EPB counter will be set to zero.
Parking Brake Calibration	The electric handbrake module will activate the handbrake calibration learn procedure when selected. During the learn procedure the rear brakes will cycle several times.
Parking Brake Cable Apply	The electric handbrake module will apply the handbrake cable tension to diagnose a possible EPB switch failure.
Parking Brake Cable Release	The electric handbrake module will release the handbrake cable to diagnose a possible EPB switch failure.
Handbrake Cable Replacement	The electric handbrake module will unwind the handbrake cable for replacement or service when selected.
Parking Brake Actuator DTC Reset	The electric handbrake module will reset the handbrake actuator when commanded.
Handbrake Switch Procedure	The electric handbrake module will test the handbrake switch signals to verify they are working properly or if there is an open circuit.