Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
The speed control is inoperative	Wiring, terminals and connectors PCM not configured for speed control Parking brake system concern Speed control switch Digital transmission range (TR) sensor Vehicle speed signal PCM	Go to Pinpoint Test A .
The speed control indicator lamp is never/always on	Wiring, terminals and connectors PCM Instrument cluster (IC)	REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article.
The set speed fluctuates	Wiring, terminals and connectors PCM Output shaft speed (OSS) sensor	REFER to the Introduction - Gasoline Engines article.