Description And Operation: Conventional: Description

The standard equipment conventional electronic speed control system includes the following major components, which are described in further detail elsewhere in this service information:

• Antilock Brake System Module  - An Antilock Brake System (ABS) module is located on the antilock brake Hydraulic Control Unit (HCU) in the engine compartment. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), DESCRIPTION AND OPERATION .
• Stop Lamp Sensor  - The stop lamp sensor is located on the brake pedal support bracket under the driver side of the instrument panel.
• Instrument Panel Cluster (IPC)  - A CRUISE indicator is located in the fixed segment display of the (IPC) that provides an indication to the vehicle operator when the speed control system is turned ON.
• Powertrain Control Module  - The Powertrain Control Module (PCM) is located in the engine compartment. The PCM contains the software and hardware that monitors all of the cruise control system inputs and controls all of the speed control system outputs. Refer to MODULE, POWERTRAIN CONTROL (PCM), DESCRIPTION AND OPERATION .
• Speed Control Switches  - A speed control switch pod containing four momentary switch push buttons is located in the right horizontal spoke of the steering wheel. Refer to SWITCH, SPEED CONTROL, DESCRIPTION AND OPERATION .
• Steering Column Control Module  - The Steering Column Control Module (SCCM) is located at the top of the steering column just below the steering wheel.
• Wheel Speed Sensors  - A wheel speed sensor is located on the knuckle of each front and rear wheel.

The ABS module, the IPC, the PCM and the SCCM each contain a microcontroller and programming that allow them to communicate with each other using the Controller Area Network (CAN) data bus. This method of communication is used by the SCCM 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 AND OPERATION .