Inspection and Verification

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION CHART

Mechanical	Electrical
Audio unit Antenna Antenna cable Global positioning system (GPS) antenna Navigation system compact disc (CD) Speaker mounting/speaker cones Radio ignition interference capacitor, radio frequency interference suppression bond, or radio receiver hood bonding strap	Smart junction box (SJB) fuse(s): 7 (10A) 12 (5 A) 16 (15A) Battery junction box (BJB) fuse(s): 15 (20A) 22 (40A) 23 (40A) Ignition switch Circuitry Audio unit CD changer Subwoofer Speaker(s)

If the vehicle is not equipped with a navigation radio, refer to INFORMATION AND ENTERTAINMENT SYSTEM in this article to continue diagnosis.
If the concern is visually evident, GO to SYMPTOM CHART .
If the concern is not visually evident, proceed to the SPEAKER WALK-AROUND TEST and the audio unit self-diagnostic mode.

AUDIO UNIT DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Source	Action
B1342	ECU Is Defective	Audio unit	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B1342 is retrieved again, REMOVE the audio unit. SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT in this article. TEST the system for normal operation after the repair.
B2103	Antenna Not Connected	Audio unit	VERIFY that the radio antenna is connected. CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2103 is retrieved again, REMOVE the audio unit. SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT in this article. TEST the system for normal operation after the repair.
B2139	Data Mismatch	Audio unit	GO to PINPOINT TEST O .
B2204	GPS Antenna Open or Short	Audio unit	GO to PINPOINT TEST R .
B2208	Navigation To Head Unit Communication Error	Audio unit	GO to SYMPTOM CHART .
B2402	Audio CD/DJ Thermal Shutdown Fault	CD changer	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2402 is retrieved again, REMOVE the CD changer. SEND it to an authorized audio system repair facility. TEST the system for normal operation after the repair.
B2403	Audio CD/DJ Internal Fault	CD changer	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2403 is retrieved again, REMOVE the CD changer. SEND it to an authorized audio system repair facility. TEST the system for normal operation after the repair.
B2405	Audio Single-Disc CD Player Thermal Shutdown Fault	Audio unit	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2405 is retrieved again, REMOVE the audio unit. SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT in this article. TEST the system for normal operation after the repair.
B2406	Audio Single-Disc CD Player Internal Fault	Audio unit	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2406 is retrieved again, REMOVE the audio unit. SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT in this article. TEST the system for normal operation after the repair.
B2858	H/U is Defective	Audio unit	GO to SYMPTOM CHART .
B2913	Audio Subwoofer Not Connected	Audio unit	GO to PINPOINT TEST L .
U2003	Audio Compact Disc/Disc Jockey is Not Responding	Audio unit	GO to PINPOINT TEST H .
U2014	Audio Subwoofer Unit is Not Responding	Audio unit	GO to PINPOINT TEST D .
A477	Audio Unit Configuration	Audio unit	CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC A477 is retrieved again, REMOVE the audio unit. SEND it to an authorized audio system repair facility. REFER to AUDIO UNIT in this article. TEST the system for normal operation after the repair.