Inspection and Verification

NOTE: If any concerns are noted with the speedometer, the stoplamps or the horn, address those concerns, referring to the appropriate system, before continuing speed control diagnosis.

1. Verify the customer concern by operating the speed control system.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage. Refer to the chart.
3. If the inspection reveals an obvious concern that can be readily identified, repair as necessary.
4. Verify the speedometer operates correctly by driving the vehicle. If the speedometer does not operate correctly, refer to Instrument Panel, Gauges and Warning Indicators.
5. If the vehicle is equipped with a diesel engine and the concern is still present after the inspection, refer to Computers and Control Systems. Testing and Inspection

If the vehicle is equipped with a gasoline engine and the concern is still present after the inspection, go to the Symptom Chart. Diagnosis By Symptom