Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the front electronic module (FEM)	Circuitry Standard corporate protocol (SCP) communication network FEM	REFER to MULTIFUNCTION ELECTRONIC MODULES .
No communication with the instrument cluster	Circuitry Standard corporate protocol (SCP) communication network Instrument cluster	REFER to INSTRUMENT CLUSTER .
The climate control illumination is inoperative	Climate control module	INSTALL a new climate control module. REFER to CLIMATE CONTROL SYSTEM-GENERAL INFORMATION AND DIAGNOSIS . TEST the system for normal operation.
One or more module-controlled illumination source(s) is inoperative	Circuitry Front electronic module (FEM) Interior auxiliary junction box Central junction box (CJB) Joint connector 3 Illumination components	Go To PINPOINT TEST A .
The control illumination is inoperative	Fuse Circuitry Central junction box (CJB) Joint connector 3 Interior auxiliary junction box Instrument cluster Front electronic module (FEM)	Go To PINPOINT TEST B .
The control illumination is always on	Circuitry Front electronic module (FEM) Central junction box (CJB) Interior auxiliary junction box Joint connector 3	Go To PINPOINT TEST C .
The instrument cluster illumination is inoperative	Circuitry Instrument cluster	Go To PINPOINT TEST D .
The instrument panel illumination does not dim	Circuitry Instrument panel dimmer switch Instrument cluster	Go To PINPOINT TEST E .