Symptom Chart

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the navigation system module	Battery junction box (BJB) fuse 14 (10A) Circuitry Navigation system module	GO to PINPOINT TEST A .
Navigation system does not operate correctly - the global positioning system (GPS) antenna signal is inoperative	Circuitry GPS antenna Navigation system module	GO to PINPOINT TEST B .
Navigation system does not operate correctly - the position cursor is inoperative	Circuitry Anti-lock brake system (ABS) module Navigation system module	GO to PINPOINT TEST C .
Navigation system does not operate correctly - the voice guidance is inoperative/does not operate correctly	Circuitry Audio unit Navigation system module	GO to PINPOINT TEST D .
Navigation system does not operate correctly - the display screen is inoperative	Circuitry Audio unit Navigation system module	GO to PINPOINT TEST E .
Navigation system does not operate correctly - the navigation screen is inoperative	Circuitry Audio unit Navigation system module	GO to PINPOINT TEST F .
Navigation system does not operate correctly - the audible switches are inoperative	Circuitry Audio unit Navigation system module	GO to PINPOINT TEST G .
Navigation system does not operate correctly - unable to insert or eject map disc	Circuitry Navigation system module	GO to PINPOINT TEST H .
Navigation system does not operate correctly - the audio unit is inoperative	Central junction box (CJB) fuse(s): 2(5A) 18 (20A) Circuitry Audio unit Navigation system module	GO to PINPOINT TEST I .