Vehicle Speed Is Unstable

If vehicle speed is unstable, perform the following procedures in order.

• Check actuator cable play and operation. See CRUISE CONTROL ACTUATOR CABLE ADJUSTMENT  under ADJUSTMENTS.
• Perform VEHICLE SPEED SENSOR CIRCUIT CHECK  under SYSTEM TESTS.
• Perform THROTTLE VALVE OPENING SIGNAL CIRCUIT  under SYSTEM TESTS.
• Replace actuator with known good unit.