Cruise Control: Description and Operation

Cruise Control System (CCS)

General information
All cruise control system functions are controlled by the Engine Control Module (ECM). The processing of electronic engine controls and cruise control functions are integrated in the ECM. Other than the cruise control switches on the steering column, the clutch and brake pedal switches (where applicable) and related wiring, there are no separate cruise control components to be serviced.

As all electronic throttle control operations are monitored by On Board Diagnostic (OBD), Diagnostic Trouble Codes (DTC) pertaining to engine electronics that are stored in DTC memory may be relevant to cruise control function.

Always check DTC memory first before troubleshooting CCS (function 02).

The operating status of the cruise control system, cruise control switches, brake and clutch switches (as inputs to the ECM) can be tested using an OBD program procedure.