Symptom Chart

Condition	Possible Sources	Action
No communication with the smart junction box (SJB)	Circuitry Medium speed controller area network (MS-CAN) Instrument cluster	REFER to MODULE COMMUNICATIONS NETWORK article.
The control illumination is inoperative/always on	Circuitry SJB Instrument panel dimmer switch	Go to Pinpoint Test F .
The instrument cluster illumination is inoperative	Circuitry Instrument cluster SJB	Go to Pinpoint Test E .
The message center/odometer display is inoperative or does not dim	Instrument cluster	INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER article.
The climate control illumination is inoperative - front or rear (if equipped)	Circuitry Climate control assembly Rear integrated control panel (RICP)	Go to Pinpoint Test A .
The audio system illumination is inoperative - front or rear controls	Circuitry Audio unit RICP	Go to Pinpoint Test B .
A single illumination source is inoperative	Circuitry Illumination source(s)	Go to Pinpoint Test C .
A single illumination source is inoperative - window control switch(es)	Window control switch(es)	CHECK the operation of the power windows. If the power windows operate correctly, INSTALL a new window control switch. REFER to GLASS, FRAMES AND MECHANISMS article. TEST the system for normal operation. If the power windows do not operate correctly, REFER to GLASS, FRAMES AND MECHANISMS article.
The steering wheel control switch illumination source is inoperative	Circuitry Clockspring Speed control switch(es) Steering wheel audio control switch Steering wheel control switch harness	Go to Pinpoint Test D .