Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The cruise control is inoperative - unable to carry-out self-test and no flash codes	Wiring, terminals or connectors Cruise control switch Clockspring Throttle body linkage Cruise control cable Stoplamp switch Cruise control deactivator switch Clutch Pedal Position (CPP) switch (manual transmission) Cruise control actuator Smart Junction Box (SJB) PCM	GO to PINPOINT TEST A .
The set speed fluctuates or incorrect vehicle speed signal (VSS)	Accelerator cable Base engine concern Cruise control cable Cruise control actuator PCM	GO to PINPOINT TEST B .
The cruise control does not disengage when the brakes are applied	Wiring, terminals or connectors Obstructions to the accelerator pedal or linkage Stoplamp switch Cruise control deactivator switch Cruise control cable Accelerator cable Cruise control actuator	GO to PINPOINT TEST C .
The cruise control does not disengage when the clutch is applied - no flash codes present	CPP switch	INSTALL a new CPP switch. REFER to ENGINE CONTROLS - ELECTRONIC ENGINE CONTROLS article. TEST the system for normal operation.
The cruise control indicator lamp is always on	Wiring, terminals or connectors Cruise control actuator Instrument Cluster (IC)	GO to PINPOINT TEST G .
Self-test will not start or complete after multiple attempts	Wiring, terminals or connectors Cruise control switch Cruise control actuator	GO to PINPOINT TEST A .
Flash code 1 - flash with last switch pressed, but no dynamic pull occurs at the throttle and the cruise control is inoperative	Cruise control cable Cruise control actuator	CHECK the cruise control cable for attachment and sticking or binding. If there is a concern with the cruise control cable, REPAIR or INSTALL a new cruise control cable. REFER to CRUISE CONTROL CABLE . TEST the system for normal operation. Otherwise, INSTALL a new cruise control actuator. REFER to CRUISE CONTROL ACTUATOR . TEST the system for normal operation.
Flash code 1 - flash with last switch pressed, dynamic pull occurs at throttle and the cruise control is inoperative	Wiring, terminals or connectors Cruise control switch Clockspring Throttle body linkage Cruise control cable Stoplamp switch Cruise control deactivator switch CPP switch (manual transmission) Cruise control actuator SJB PCM	GO to PINPOINT TEST A .
Flash code 2 - stoplamp switch circuit failure	Wiring, terminals or connectors Stoplamp switch CPP switch (manual transmission) Cruise control actuator	GO to PINPOINT TEST D .
Flash code 3 - cruise control deactivator switch circuit failure	Wiring, terminals or connectors Cruise control deactivator switch Cruise control actuator	GO to PINPOINT TEST E .
Flash code 4 - vehicle cruise signal circuit failure	Wiring, terminals or connectors Cruise control actuator	GO to PINPOINT TEST F .
Flash code 5 - cruise control actuator internal failure	Cruise control actuator	INSTALL a new cruise control actuator. REFER to CRUISE CONTROL ACTUATOR . TEST the system for normal operation.
The cruise control drops out when pressing the switches	Cruise control switch Cruise control actuator	GO to PINPOINT TEST H .
The vehicle does not slow down after deactivating the cruise control	Base engine operation	The cruise control system does not control the vehicle speed when deactivated. ADVISE the customer the brakes must be applied to slow the vehicle.
The cruise control is inoperative when towing a trailer	Aftermarket trailer tow wiring harness	ADVISE the customer that the factory trailer tow wiring harness must be used.
The cruise control indicator lamp is never on	Wiring, terminals or connectors Cruise control actuator IC	REFER to INFORMATION CENTER - INSTRUMENTATION AND WARNING CHIMES article to continue diagnosis of the cruise control indicator lamp.