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.

When vehicle is in cruise control mode, system will cancel due to a malfunction in actuator, vehicle speed sensor or speed control switch circuit. When cruise control functions are canceled, CRUISE indicator light will blink 5 times, indicating 2-digit trouble code(s) are 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 Diagnostic Trouble Codes (DTCs) were set, a system function test can be performed. System function test will cause CRUISE indicator light to display a one-digit function code if circuit tested is okay. See CRUISE CONTROL FUNCTION TEST under TROUBLE SHOOTING. Function codes are not to be confused with DTCs. One-digit function codes are only used in the function test. Two-digit trouble codes indicate that a fault has occurred in the system.