Symptom Chart

SYMPTOM

Condition	Possible Sources	Action
The speed control is inoperative	Circuitry Speed control switches Powertrain control module (PCM)	GO to PINPOINT TEST A .
The speed control indicator lamp is never/always on	Circuitry Powertrain control module (PCM) Instrument cluster	REFER to INSTRUMENT CLUSTER .
The set speed fluctuates	Circuitry Powertrain control module (PCM) Output shaft speed (OSS) sensor	REFER to the INTRODUCTION -- GASOLINE MODELS article to continue diagnosis of the OSS sensor.