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 audio unit - CDX6 and DM100i only	Circuitry Audio unit Central junction box (CJB)	GO to PINPOINT TEST A .
The audio unit is inoperative/does not operate correctly	Circuitry Audio unit CJB Driver door module (DDM)	GO to PINPOINT TEST B .
The audio unit does not operate correctly - display is frozen or no graphics are displayed (navigation audio unit only)	Circuitry Audio unit Navigation system module	REFER to NAVIGATION SYSTEM .
Poor reception	Antenna Antenna connections Noise suppression equipment Ignition system Generator Antenna isolator module Audio unit	GO to PINPOINT TEST C .
Continuous SEEK/SCAN in AM/FM	Antenna Antenna connections Antenna isolator module Audio unit	GO to PINPOINT TEST C .
Poor quality/distorted/no sound from one or more speakers - except navigation	Speaker Circuitry Audio unit Center imaging amplifier	GO to PINPOINT TEST D .
Poor quality/distorted/no sound from one or more speakers - navigation	Speaker Circuitry Audio amplifier Audio unit	GO to PINPOINT TEST E .
The subwoofer is inoperative - CDX6 only	Circuitry Subwoofer amplifier Subwoofer speaker Audio unit	GO to PINPOINT TEST F .
The subwoofer is inoperative - navigation only	Circuitry Subwoofer amplifier Subwoofer speaker Audio unit	GO to PINPOINT TEST G .
The auxiliary audio control is inoperative/does not operate correctly - steering wheel control switches	Circuitry Audio unit Steering wheel control switches Horn switch harness Clockspring Powertrain control module (PCM)	GO to PINPOINT TEST H .
Loud popping sound when cycling the ignition switch - CDX6 and navigation only	Circuitry Subwoofer amplifier Audio unit Center imaging amplifier	GO to PINPOINT TEST I .