Speed Control Inoperative

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Dodge Intrepid, 2003 Chrysler Intrepid, 2003 Chrysler Concorde, 2003 Chrysler 300M, and 2002 Dodge Intrepid. However, it is still accessible from the selected car via links, so may be relevant.

Road test vehicle and monitor Speed Control (S/C) system and speedometer operation. If road test verifies a malfunctioning S/C system and speedometer, diagnose speedometer problem before proceeding. See ANALOG INSTRUMENT PANELS - CONCORDE, INTREPID & 300M article. If road test verifies a malfunctioning S/C system, but speedometer operates properly, perform the following checks:

Turn ignition off. Connect scan tool. Using scan tool, retrieve DTCs. If DTCs exist, go to SELF-DIAGNOSTIC SYSTEM .
Check brake switch adjustment. See BRAKE SWITCH under REMOVAL & INSTALLATION.
Check for loose or corroded terminals at S/C servo. See COMPONENT LOCATIONS .
Check for leaking vacuum reservoir.
Check for loose or leaking vacuum supply lines.
Check for defective one-way vacuum check valve.
Check that both ends of servo control cable are attached securely.
Check that throttle linkage is not damaged or binding.
Check for damaged, binding or faulty servo.

If system and components appear to be okay and no DTCs are set, perform appropriate test(s) under SYSTEM TESTS .