Difference Between Actual Vehicle Speed & Set Speed Is Too Great

Check cruise control actuator cable adjustment. See CRUISE CONTROL ACTUATOR CABLE  under ADJUSTMENTS. If cable adjustment is okay, perform the following check procedures in order:

• BRAKELIGHT SWITCH CIRCUIT CHECK 
• O/D & TCC OFF SIGNAL CIRCUIT 
• THROTTLE VALVE OPENING SIGNAL CIRCUIT CHECK 
• CRUISE CONTROL ECU CIRCUIT CHECK