General information
All cruise control system functions are controlled by the applicable 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/multi-function steering wheel, 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 the applicable Engine Fuel Injection system DTC memory first with VAS 5051 Vehicle Diagnostic Testing and Information System before troubleshooting CCS.
Perform troubleshooting of CCS using VAS 5051 Vehicle Diagnostic Testing and Information System
See also:
• VAS 5051 TESTER, CONNECTING