Speed Control System (Cruise Control) - General Information and Functional Check

PROCEDURE

1. The cruise control system maintains the selected cruising speed of the vehicle automatically. The cruise control servo is located in the engine compartment, mounted on the left side of the rear bulkhead (on V6 models, on the right side), and is connected to the throttle lever by a cable. The main components of the system are the servo, the brake pedal switch (on manual transmission models, the clutch pedal switch), the control switches, the speed sensors, and the relays. Checking the individual functions of the system requires special diagnostic equipment and is beyond the scope of an average do-it-yourself mechanic. The following describes only general checks to identify the causes of the most common cruise control malfunctions.
2. Locate the cruise control fuse and check its condition (refer to Fuses - General Information).
3. The brake pedal switch (or the Brake Pedal Position [BPP] switch) must cancel cruise control when the brake pedal is pressed. Have an assistant press the brake pedal and check that the brake lights operate.
4. If the brake lights do not respond when the pedal is pressed, determine the cause of the malfunction and repeat the cruise control operation check.

5. Check the condition of the control cable running from the cruise control servo/actuator assembly to the throttle lever. Replace the cable if it is damaged or worn.