Initialization Sequence

The electronic brake control module (EBCM) performs 1 initialization test each ignition cycle. The initialization of the EBCM occurs when 1 set of the following conditions occur:

Both of the following conditions occur:

• The EBCM detects that there is a minimum of 500 RPM from the powertrain control module (PCM) via a serial data message.
• The brake pedal position sensor (BPP) is not applied.

OR

Both of the following conditions occur:

• The vehicle speed is greater than 16 km/h (10 mph).
• The BPP is applied.

The initialization sequence may also be commanded with a scan tool.

The initialization sequence cycles each solenoid valve and the pump motor, as well as the necessary relays, for approximately 1.5 seconds to check component operation. The EBCM sets a DTC if any error is detected. The initialization sequence may be heard and felt while it is taking place and is considered part of normal system operation.

The EBCM defines a drive cycle as the completion of the initialization sequence.