Speed Control (Service Information): Description

An electronic speed control (also known as cruise control) system is standard factory-installed equipment on this vehicle. The electronic speed control system includes the following major components, which are described in further detail elsewhere in this service information:

• Body Control Module  - The Body Control Module (BCM) located in the passenger compartment receives the hardwired inputs from the cruise control switches and the stop lamp switch, then relays those inputs to the Powertrain Control Module (PCM) over the Controller Area Network (CAN) data bus. Refer to MODULE, BODY CONTROL (BCM), DESCRIPTION .
• Brake Lamp Switch  - The brake (also known as stop) lamp switch is located on the brake pedal support bracket under the driver side of the instrument panel. Refer to SWITCH, STOP LAMP, DESCRIPTION .
• Instrument Panel Cluster  - A CRUISE indicator is located in the Instrument Panel Cluster (IPC) that provides an indication to the vehicle operator when the speed control system is turned ON. Refer to DESCRIPTION .
• Powertrain Control Module  - The PCM located in the engine compartment contains the software and hardware that monitors all of the speed control system inputs and controls all of the speed control system outputs. Refer to MODULE, POWERTRAIN CONTROL (PCM), DESCRIPTION .
• Speed Control Switch Stalk  - A speed control switch containing selectable speed control options is located in the stalk attached to the left side of the steering column.
• Wheel Speed Sensors  - A wheel speed sensor is located on the knuckle of each front and rear wheel. Refer to DESCRIPTION .

The BCM, the PCM and the IPC each contain programming that allow them to communicate with each other using the CAN bus. This method of communication is used by the BCM to relay the status of the speed control switches to the PCM, and by the PCM for control of the CRUISE indicator in the IPC. Refer to COMMUNICATION, DESCRIPTION .