Cruise Control System Switches

WARNING: This page is about a different car, the 2003 Dodge Grand Caravan, 2003 Dodge Caravan, 2003 Chrysler Voyager, and 2003 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Cruise control system may also be referred to as speed control system.

There are 2 separate switch pods that operate the cruise control system and are located on the steering wheel. The cruise control system has 5 separate resistance switches that provide a single multiplexed (MUX) voltage input to the Powertrain Control Module (PCM). The switch names are: On, Off, Set, Coast, Resume, Accel, Tap-up, Coast and Cancel. Based on conditions when the buttons are pushed (and released), the 5 voltage ranges provided to the PCM result in the following functions: On, Off, Set, Coast, Resume, Accel, Tap-Up, Tap-Down, Coast and Cancel. The PCM also receives an input from the brake switch to sense whether the brake pedal has been depressed. When the PCM receives the brake depressed input, it turns off power to the cruise control servo and disengages cruise control. Also the power to the servo is supplied thorough the brake switch, which opens the circuit when the brake pedal is depressed. The individual switches cannot be repaired. If one switch fails, the entire switch module must be replaced.