Cruise Control: Testing and Inspection

Cruise Control Inoperative/Malfunctioning (6.6L)

Diagnostic Aids

To avoid a misdiagnosis, inspect for the following:

* Proper operation of the stop lamps. Refer to Exterior Lighting Systems Description and Operation.
* The throttle linkage is not binding.

Electro magnetic interference (EMI) on the speed sensor signal circuit may cause erratic cruise control operation.

Conditions for Enabling Cruise Control

* The vehicle speed is greater than 40 km/h (25 mph).
* The vehicle is not in PARK, REVERSE, NEUTRAL, or 1st gear.
* The system voltage is between 12 volts and 16 volts.

Test

Step 1 - Step 9:

Step 10 - Step 23:

Step 24 - Step 25: