Symptom Chart

NOTE: Refer to SYSTEM WIRING DIAGRAMS for connector numbers stated in the pinpoint test.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the powertrain control module (PCM)	Underhood auxiliary junction box (AJB) fuse 118 (40A). Central junction box (CJB) fuses: 204 (5A). 207 (5A). Circuitry. PCM.	GO to PINPOINT TEST A: NO COMMUNICATION WITH THE POWERTRAIN CONTROL MODULE .
Unable to enter self-test	PCM.	GO to PINPOINT TEST B: UNABLE TO ENTER SELF-TEST .
The speed control switch is inoperative-no DTCs	Speed control actuator switch.	INSTALL a new speed control switch. REFER to SPEED CONTROL SWITCH .
The speed control indicator is always on	Instrument cluster.	REFER to INSTRUMENT CLUSTER .
The speed control is inoperative-no DTCs	Circuitry. Parking brake switch. Digital transmission range (TR) sensor. Low battery voltage.	GO to PINPOINT TEST H: THE SPEED CONTROL IS INOPERATIVE-NO DTCs .