Inspection and Verification: Notes
NOTE:
If any concerns are noted with the speedometer, stoplamps, or horn, address those concerns by referring to their associated articles before continuing speed control system diagnosis.
- Verify the customer concern.
- Verify the speedometer operates correctly without speed control by test driving the vehicle. If the speedometer does not operate correctly, refer to INSTRUMENT CLUSTER .
- Verify the stoplamps operate correctly with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING .
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Speed control cable
- Speed control actuator
- Battery junction box (BJB) fuse 29 (10A) (speed control servo) (vehicles built after 11/04)
- Central junction box (CJB) fuse(s):
- 42 (15A) (speed control deactivator switch)
- 53 (10A) (speed control servo) (vehicles built before 11/04)
- Circuitry
- Loose or corroded connector(s)
- Switches
- Speed control actuator
- Check the wiring harness for obvious signs of shorts, opens, bad connections, or damage.
- Verify that the throttle cable is adjusted correctly and not holding the throttle open or increasing the idle speed.
- Make sure the throttle linkage operates freely and smoothly when connected to the speed control cable and speed control actuator.
- If the fault is not visually evident, verify the symptom and go to the Self-Test Diagnostics.