Self-Diagnostic System

When vehicle is in cruise control mode, system will cancel due to a malfunction in actuator, vehicle speed sensor or other cruise circuit. When cruise control functions are canceled due to a malfunction, CRUISE indicator light will blink, indicating a trouble code is stored in cruise control ECU memory. See DIAGNOSTIC TROUBLE CODE (DTC) DEFINITIONS table under SELF-DIAGNOSTIC SYSTEM.

If a fault or symptom is present, but no trouble codes were set, a system function test can be performed. See CRUISE CONTROL FUNCTION TEST under TROUBLE SHOOTING.

Before proceeding with cruise control system self-diagnostic system, ensure basic inspection of system connectors and wiring harnesses has been performed. If no faults were found during basic inspection, proceed with self-diagnostic system.

NOTE: Intermittent failures may cause CRUISE indicator light to flicker or come on. Light will go out after fault goes away. Fault may or may not be present at time of testing. However, a corresponding trouble code may be stored in cruise control ECU memory. See DIAGNOSTIC PROCEDURE under SELF-DIAGNOSTIC SYSTEM.