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Home >> Buick >> 2007 >> Lucerne V6-3.8L >> Repair and Diagnosis >> Cruise Control >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Cruise Control Inoperative/Malfunctioning
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Cruise Control Inoperative/Malfunctioning



Cruise Control Inoperative/Malfunctioning

Diagnostic Aids

In order to avoid misdiagnosis, inspect for the following:

* Ensure that the following cruise control switches are not stuck in the engaged position:

- On/Off switch
- Set/Coast switch
- Resume/Accel switch

* Proper operation of the brake lamps - Refer to Exterior Lighting Systems Description and Operation.

For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics

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 within 9-16 volts.
* The park brake is not applied.

Test Description

Step 1 - Step 7:




Step 8 - Step 16:




The number below refers to the step number on the diagnostic table.
6. This step tests the ignition 1 voltage circuit for an open, for a short to ground, or for a high resistance.
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