Symptom Chart: Notes

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the front electronic module (FEM)	Central junction box fuse(s): 20 (10A). 29 (5A). 30 (5A). 33 (10A). Battery junction box (BJB) fuse 25 (40A). Circuitry. J1850 standard corporate protocol (SCP) communication network. FEM.	REFER to MODULE COMMUNICATIONS NETWORK to continue module communication diagnosis.
No communication with the instrument cluster	Central junction box (CJB) fuse(s): 4 (5A). 13 (5A). 17 (5A). 20 (10A). Circuitry. J1850 standard corporate protocol (SCP) communication network. Instrument cluster.	Go To PINPOINT TEST F .
The climate control illumination is inoperative	Climate control module.	INSTALL a new module. REFER to CLIMATE CONTROL SYSTEM . CLEAR the DTCs. REPEAT the self-test.
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	Central junction box (CJB) fuse 33 (10A). Circuitry. 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 .