Check SET/ACCL Switch

Turn ignition off. Disconnect speed control servo/actuator connector C177 (located on left front side of engine compartment). Using an ohmmeter, check resistance between speed control servo/actuator connector C177 terminals No. 5 and 6 while pressing speed control SET/ACCL switch. See Figure . If resistance is 646-714 ohms, replace speed control servo/actuator and retest system operation. If resistance is not 646-714 ohms, replace speed control switches and retest system operation.