Preliminary Inspection
- Check fuses, and replace as necessary. See WIRING DIAGRAMS . Visually inspect for broken or open wires. Check for a broken or partially broken wire inside insulation which could cause system malfunction, but prove good in a continuity/voltage check with system disconnected.
- Check for any stored Diagnostic Trouble Codes (DTCs). See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTICS SYSTEM. Service any stored DTCs. See DIAGNOSTIC TESTS . If no DTCs exist, go to next step.
- Ensure any aftermarket electronic equipment (if equipped) is properly installed. Repair as necessary. After repair, check cruise control system for normal operation. If problems still exist, go to SYMPTOM TESTS .