Audio System — Acura MDX II (2006-2010)

Scheme 61

Scheme 61: Component Location Index

Scheme 62

Symptom Troubleshooting Index

Symptom	Diagnostic procedure	Also check for
Poor AM or FM radio reception or interference	Symptom Troubleshooting (see POOR AM OR FM RADIO RECEPTION OR INTERFERENCE )	AM/FM antenna lead and/or sublead short or open in the wire AM/FM antenna open
Audio unit power switch will not turn ON (No information display and no sound)	Symptom Troubleshooting (see POWER SWITCH WILL NOT TURN ON (NO INFORMATION DISPLAY AND NO SOUND) )
Audio unit power will not turn OFF	Symptom Troubleshooting (see AUDIO UNIT POWER WILL NOT TURN OFF )
No sound is heard from speaker(s) (display is normal) (with navigation)	Symptom Troubleshooting (see NO SOUND IS HEARD FROM SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION) )
No sound is heard from speaker(s) (display is normal) (without navigation)	Symptom Troubleshooting (see NO SOUND IS HEARD FROM SPEAKER(S) (DISPLAY IS NORMAL) (WITHOUT NAVIGATION) )
Audio system sound is weak or distorted (display is normal)	Symptom Troubleshooting (see AUDIO SYSTEM SOUND IS WEAK OR DISTORTED (DISPLAY IS NORMAL) )
Radio preset memory is lost	Symptom Troubleshooting (see RADIO PRESET MEMORY IS LOST )	Battery condition Battery cable condition
Volume does not change	Symptom Troubleshooting (see VOLUME DOES NOT CHANGE )
Volume does not increase with speed	Symptom Troubleshooting (see VOLUME DOES NOT INCREASE WITH SPEED )
Volume is too high or too low when driving at freeway speeds	Symptom Troubleshooting (see VOLUME IS TOO HIGH OR TOO LOW WHEN DRIVING AT FREEWAY SPEEDS )
Radio tuner does not change stations	Symptom Troubleshooting (see RADIO TUNER DOES NOT CHANGE STATIONS )
Display does not dim or brighten with dimmer	Symptom Troubleshooting (see DISPLAY DOES NOT DIM OR BRIGHTEN WITH DIMMER )
Audio unit button illumination does not work	Symptom Troubleshooting (see AUDIO UNIT BUTTON ILLUMINATION DOES NOT WORK )
Audio disc does not load	Symptom Troubleshooting (see AUDIO DISC DOES NOT LOAD )
Audio disc does not eject	Symptom Troubleshooting (see AUDIO DISC DOES NOT EJECT )
Audio disc changer does not load all six discs	Symptom Troubleshooting (see AUDIO DISC CHANGER DOES NOT LOAD ALL SIX DISCS )	Tire pressure (over-inflated), disc smudged, dirty, or scratched
Audio disc changer does not move between discs	Symptom Troubleshooting (see AUDIO DISC CHANGER DOES NOT MOVE BETWEEN DISCS )
Audio disc does not play	Symptom Troubleshooting (see AUDIO DISC DOES NOT PLAY )
Audio disc skips	Symptom Troubleshooting (see AUDIO DISC SKIPS )	Tire pressure (over-inflated), disc smudged, dirty, or scratched
Error code: XM NO SIGNAL or XM ANTENNA is displayed	Symptom Troubleshooting (see ERROR CODE: XM NO SIGNAL OR XM ANTENNA IS DISPLAYED )
XM radio display is blank and no station information is displayed (with AcuraLink)	Symptom Troubleshooting (see XM radio display is blank and no station information is displayed (with AcuraLink) )
XM radio display is blank and no station information is displayed (without AcuraLink)	Symptom Troubleshooting (see XM radio display is blank and no station information is displayed (Without AcuraLink) )
XM radio preset memory is lost (with AcuraLink)	Symptom Troubleshooting (see XM radio preset memory is lost (with AcuraLink) )
XM radio preset memory is lost (without AcuraLink)	Symptom Troubleshooting (see XM radio preset memory is lost (without AcuraLink) )
Poor or no sound with XM radio (Audio unit does display XM channels)	Symptom Troubleshooting (see POOR OR NO SOUND WITH XM RADIO (AUDIO UNIT DOES DISPLAY XM CHANNELS) )
Audio remote switch does not work properly	Symptom Troubleshooting (see AUDIO REMOTE SWITCH DOES NOT WORK PROPERLY )
Audio unit button does not work	Symptom Troubleshooting (see AUDIO UNIT BUTTON DOES NOT WORK )
Audio unit disc indicator does not work	Symptom Troubleshooting (see AUDIO UNIT DISC INDICATOR DOES NOT WORK )
Security indicator does not work properly	Symptom Troubleshooting (see SECURITY INDICATOR DOES NOT WORK PROPERLY )

SYMPTOM TROUBLESHOOTING CHART

Overview

The audio unit acts as the processor for all audio functions. You can select the audio functions from the audio panel, the audio remote (on steering wheel), or by using the navigation voice control system. The audio display provides the current front and rear audio status. For vehicles with the navigation option, additional audio information is available by touching the audio button. (See the owner's manual for more details.)

Each audio component passes its audio or audio signal to the audio unit. In addition, it communicates with the audio unit via the GA-Net bus. Any open connection in this circuit will cause audio and navigation functions to appear inoperative.

The audio unit has a built-in EEPROM (electrically erasable programmable read-only memory). This memory holds the audio presets data (AM/FM radio frequency, sound settings, etc.) even when the battery is disconnected.

With the ELS and the premium sound system, an audio amplifier unit powers the speakers.

The 6 DVD (6 CD) changer output can be directed to the audio unit.

The XM can be output to either the front or the RES (rear entertainment system). However, if the XM is playing in the front, the CD changer cannot be used for the RES. The RES (built into the audio unit) can be used to play a CD in the rear.

A security signal is daisy-chained between the audio, RES and navigation components for integration into the vehicle's alarm system.

Speed-sensitive volume compensation (SVC)

Some audio systems are equipped with speed-sensitive volume compensation (SVC). The navigation or audio unit receives the vehicle speed pulse (VSP) from the PCM. The system processes the speed input and increases the navigation or audio system volume level as the vehicle speed increases to compensate for the various interior noise that occurs at higher speeds. When the vehicle slows down, the volume returns to its normal level. The SVC has four settings: SVC OFF, LOW, MID, and HIGH that can be adjusted using the navigation or audio unit. The SVC comes from the factory with the MID set as the default.

To change the audio unit SVC setting, press the tune folder sound knob repeatedly until the SVC is displayed, rotate the knob to adjust the SVC to the desired setting (SVC OFF, LOW, MID, or HIGH).

To change the navigation unit SVC setting, press the AUDIO button, and then select the SOUND icon on the navigation display. Press the navigation display to select the desired setting (OFF, LOW, MID, HI).

The optional navigation system provides voice control for radio, XM, CD player, and RES functions. The GA-Net (audio unit) communicates the voice control commands. When using the TALK/BACK or route guidance (RG), only the center speaker is muted and you hear the navigation instructions through the front speakers. When using HFL/AcuraLink, the center speaker, the rear speakers, and the subwoofer are muted and the front speakers give the telephone sound. When using HFL/AcuraLink and RG or TALK/BACK, the center speaker, the rear speakers, and the subwoofer are muted and you hear the telephone sound and navigation instructions through the front speakers but not the RES headphones. GA-Net bus passes the muting commands. For more information, see the NAVIGATION SYSTEM article. The outline of the audio interruption function is shown in the following table.

Contents	Audio output
Contents	Center CH	Left front CH	Right front CH	Right rear CH	Left rear CH	Subwoofer CH
TALK/BACK	MUTE	Navigation sound	Navigation sound	Audio	Audio	Audio
Route guidance	MUTE	Navigation sound	Navigation sound	Audio	Audio	Audio
On Star/HFL/AcuraLink	MUTE	Telephone sound	Telephone sound	MUTE	MUTE	MUTE
On Star/HFL/AcuraLink and RG or TALK/BACK	MUTE	Telephone sound and navigation sound	Telephone sound and navigation sound	MUTE	MUTE	MUTE

CONTENTS CHART

Scheme 63

Scheme 63: System Diagram

Note. All items may not apply to this vehicle. Seethe Owner's Manual for more information.

Audio Glossary

Item	Definition
Active noise control	The active noise control system cancels some of the vehicle noise. This occurs in the 1,500-2,400 rpm range. Microphones detect the low frequency sound, and the system outputs a canceling sound from the audio speaker.
AM (Amplitude Modulation)	The type of transmission used in the standard radio broadcast band from 530 to 1705 kHz.
Amplifier	A device that increases the level of a signal by increasing the current or voltage.
Antenna	A device used to send or receive electromagnetic waves through the air.
ATA (PC Card)	A type of card that has been tested for use in playing WMA, and MP3 music files in the PC Card slot. Sizes of up to 1 GB have been tested.
Audio remote switch	The switches on the steering wheel that control the audio system.
Auxiliary Jack	Allows the client to use a portable audio device to input music recordings.
Balance	A control that changes the relative volume of the left and right channels.
Band	A range of frequencies between two definite limits. Bands are assigned by the Federal Communications Commission for specific uses.
Bass	An adjustment for the low frequency sounds of around 160 Hz and below.
Byte	A unit of storage for computer files and memory. A CD holds approximately 700 million bytes.
Cassette	Audio or video magnetic tape container having two reels. Client's can insert it for recording or play back.
Compact flash	A standard for small-size (3x4 cm), memory cards used in mobile computers, PDAs, digital cameras. Compact flash memory cards are available in size of 32 MB up to 4 GB or more and can be played in the audio PC slot. Sizes above 1 GB has not been tested.
CD (Compact Disc)	A 4.5-inch plastic disc containing digital audio recording that is played optically on a laser equipped player. Never use discs with a paper label. In a hot car, labels can curl up and jam the unit.
CD (audio disc) changer	CD player that can store and play more than one CD. Two types are available. Some units accept CDs fed into the changer one at a time, and others accept a magazine (with CD's stacked in a container).
CD player	A component designed to play compact disc CD recording using a laser optical pickup. The signal from a CD player usually requires amplification.
Distortion	Inexact reproduction of an audio signal caused by playing music at levels the audio system cannot handle.
Dolby (noise reduction)	A processing system developed by Dolby Laboratories that reduces the background noise on recording media. The result is a cleaner playback from the audio system.
DVD (Digital Versatile Disc)	A 4.5-inch CD-like format used for storing movies with digital audio and video features. The DVD-A format is a DVD format designed for DVD audio systems. Some vehicles can play DVD and DVD-A formats.
Equalizer	A device that changes the relative volume of individual frequency bands to suit personal tastes of the listener.
Fader	The control that adjusts the relative volume levels of front and rear speakers in a four-speaker system.
Format	To prepare a PC Card to receive files this function is performed on a PC. Always choose either FAT or FAT32 as the NTFS format is not accepted by the system. Pick the default sectors for the format method selected.
FM (Frequency Modulation)	The form of modulation used for radio and television sound transmission in most of the world. Less prone to interference than AM. The FM broad cast band covers roughly 87 to 108 MHz.
GA-Net	The GA-Net allows the audio unit to communicate with all the audio and navigation components in a vehicle. If there is an open in the GA-Net, components or the entire audio and navigation system may appear inoperative.
GB (Gigabyte)	A unit of memory or disk storage equal to billion bytes (1000 million bytes).
HDD	Abbreviation for hard disc drive. They are sensitive to heat and it is not recommended that they be used in the PC card slot for playing audio files.
Hertz (HZ)	The unit of frequency equal to one cycle per second (cps). One kilohertz (kHz) equals 1,000 cps; one megahertz (MHz) equals 1 million cps.
Integrated amplifier	A component that combines a pre amp and a power amp into a single unit. A receiver combines an integrated amp and a tuner into a single unit.
Jewel case	The hard plastic case that contains a compact disc or DVD. Always use a jewel case to prevent scratches on the underside of a CD or DVD.
LCD (Liquid Crystal Display)	A type of digital display that changes reflectance or transmittance when an electrical field is applied to it.
MB (Megabyte)	A unit of memory or disc storage equal to 1 million bytes.
Memory	Circuitry or devices that hold information in electrical or magnetic form, such as the AM/FM radio presets.
MB (Megabyte)	One million bytes. Written as 1 MB. Megabytes are used as a measure of digital storage space. For example, a CD can hold 650 MB.
Mic	An abbreviation for microphone. For vehicles with navigation, the microphone accepts navigation voice commands to control audio and navigation functions.
MP3 music files	MP3 is an audio coding format. MP3 is a poplar audio compression format on the Internet and computers. CDs, and PC Card with these files can be played on some vehicle's audio system.
Mute	When the navigation gives guidance, the front speakers are muted (no music). When you use the voice control system, all of the speakers are muted.
Noise	Unwanted random sounds like buzzing, hiss, pops, static, whine, etc.
PC card	The slot used for playing MP3 and WMA music files. The PC Card is usually a combination of a small flash card in a PCMCIA adaptor that slides into the slot. The ATA, SD, and compact flash types of cards have been tested up to 1 GB.
PCMCIA	A computer standard for the slot that the PC card slides into. Another term for the PC card slot.
Processor	The part of an audio device that performs task/calculations. In the audio unit the processor handles muting to allow the navi to speak voice commands, and the decoding/playback of the sound files etc.
Radio	A head unit that combines a tuner, a preamplifier, and often a power-amplifier.
SCF (Cold Start Fix) screens	These screens are displayed if the system requires a GPS initialization. The vehicle should be moved outside into an open area away from buildings/power lines.
Stereo	A recording of at least two channels where you can hear sound or music from the left or right side.
SD (Secure Digital) card	This compact type of memory card allows for fast data transfer and has built-in security functions. SD cards have a small write-protection switch on the side.
Shield	A metallic foil or braided wire layer surrounding conductors which are designed to prevent electrostatic or electromagnetic interference (noise) from external sources such as buzzing, or popping sounds heard on the speakers.
Speaker (Loudspeaker)	A device that converts electrical energy into acoustical energy (sound).
Speed-sensitive volume compensation (SVC)	The SVC increases the audio volume to compensate for increased interior noise when the vehicle drivers at freeway speeds.
Subwoofer	A loudspeaker made to reproduce the lowest audio frequencies, approx 25 Hz to 125 Hz.
Track	A sound recording on a CD, tape, or PC Card.
Treble	An adjustment to control the "volume" of the high frequency sounds.
Tuner	A component (or part of a component) that receives radio signals and selects one broadcast from many.
Tweeter	A speaker designed to reproduce the higher frequencies (treble) only.
Voice coil	A coil of wire wrapped around a tube and then attached to the speaker cone or diaphragm. When an audio signal is applied, the coil becomes an electromagnet and interacts with the permanent magnet causing the come or diaphragm to vibrate. We interpret this vibrations as sound.
Volume control	Allows you to control the loudness of the music.
WMA music file	Windows Media Audio File. This is an accepted format for music files to be played on either a CD-R, a CD-RW, or a PC Card.
Woofer	A speaker that is designed to reproduce bass frequencies only.
XM radio	Satellite based radio transmission, which also uses a ground based repeater network to ensure seamless reception. The channels originate from XM's broadcast center, in Washington, DC, and up link to two satellites. These satellites transmit the signal across the entire continental United States.
XM receiver	The external component that receives and processes the XM signals from the XM satellites, and terrestrial (land) stations. The audio unit communicates to the XM receiver over the GA-Net bus.

AUDIO GLOSSARY TERMS

Audio Unit Connector for Inputs and Outputs

When replacing an audio unit connector, match the wires to the cavities listed in the following tables.

With navigation/With rear entertainment system

Scheme 64

Scheme 64: Audio Unit Connector for Inputs and Outputs

With navigation/Without rear entertainment system

Scheme 65

When replacing an audio unit connector, match the wires to the cavities listed in the following tables.

Without navigation/Without rear entertainment system

Scheme 66

Scheme 66: Audio Unit Connector for Inputs and Outputs

Scheme 67

Cavity	Wire	Connects to
A4	LT GRN	Rear controller and screen (SCTY4) (3)
	LT GRN	Navigation display unit (SCTY4) (1)
	RED (2)	MICU (SCTY 1)
A6	LT BLU	MICU (K-LINE)
A9	BLK	Ground (G504)
A14	PUR	ACC (audio power supply)
A17	WHT	Constant power
(1) With navigation (2) Without navigation (3) With rear entertainment

(1)	With navigation

(2)	Without navigation

(3)	With rear entertainment

AUDIO UNIT A (17P) CONNECTOR TERMINAL REFERENCE

Scheme 68

Cavity	Wire	Connects to
B3	BRN	Audio remote ground
B5	GRN	Stereo amplifier (RS485+) (1)
B6	BLU	Stereo amplifier (RS485-) (1)
B8	RED	Stereo amplifier (FL PRE IN-)
B10	PNK	Stereo amplifier (FR PRE IN-)
B11	PUR	Stereo amplifier (RL PRE IN-)
B13	YEL	Stereo amplifier (RR PRE IN-)
B14	RED	Stereo amplifier (SW PRE IN-)
B16	PNK	Stereo amplifier (CTR PRE IN-)
B19	ORN	Audio remote
B20	PNK	Stereo amplifier (RS 485 GND) (1)
B22	BRN (2)	Stereo amplifier (RS 485 SH) (1)
B23	LT GRN	Stereo amplifier (+B)
B24	GRN	Stereo amplifier (FL PRE IN+)
B26	BLU	Stereo amplifier (FR PRE IN+)
B27	LT BLU	Stereo amplifier (RL PRE IN+)
B29	BRN	Stereo amplifier (RR PRE IN+)
B30	GRN	Stereo amplifier (SW PRE IN+)
B32	BLU	Stereo amplifier (CTR PRE IN+)
(1) With navigation (2) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	With navigation

(2)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUDIO UNIT B (32P) CONNECTOR TERMINAL REFERENCE

Scheme 69

Cavity	Wire	Connects to
C1	PNK	Auxiliary jack assembly (AUX AUDIO R/L GND)
C2	BRN (1)	Auxiliary jack assembly (AUX AUDIO R/L SH)
C5	PUR	XM receiver, HandsFreeLink control unit (LINE OUT-)
C6	BRN (1)	XM receiver, HandsFreeLink control unit (LINE OUT SH)
C13	BLU	Auxiliary jack assembly (AUX AUDIO R)
C14	GRN	Auxiliary jack assembly (AUX AUDIO L)
C15	WHT	Auxiliary jack assembly (CONN CHK)
C17	LT BLU	XM receiver, HandsFreeLink control unit (LINE OUT+)
C23	LT GRN	XM receiver (B-CAN)
C24	BLU	Climate control unit (HVAC BUS)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUDIO UNIT C (24P) CONNECTOR TERMINAL REFERENCE

Scheme 70

Cavity	Wire	Connects to
C1	RED	Auxiliary jack assembly (AUX SIG GND)
C2	BRN (1)	Auxiliary jack assembly (SH AUX)
C5	PUR	XM receiver, HandsFreeLink control unit (LINE OUT-)
C6	BRN	XM receiver, HandsFreeLink control unit (LINE OUT SH)
C13	BLK	Auxiliary jack assembly (AUX RCH)
C14	WHT	Auxiliary jack assembly (AUX LCH)
C15	LT BLU	Auxiliary jack assembly (AUX DET)
C17	LT BLU	XM receiver, HandsFreeLink control unit (LINE OUT+)
C23	LT GRN	XM receiver (B-CAN)
C24	BLU	Climate control unit (HVAC BUS)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUDIO UNIT C (24P) CONNECTOR TERMINAL REFERENCE

Scheme 71

Cavity	Wire	Connects to
D2 (1)	RED	XM receiver (ACC)
D3	BRN (2)	XM receiver. Navigation unit, Navigation display unit (GANET BUS SH)
D4	BRN (2)	XM receiver (GANET AUDIO SH)
D5	RED	XM receiver (GANET AUDIO R+)
D6	BLK	XM receiver (GANET AUDIO L+)
D9	GRN	XM receiver, Navigation unit, Navigation display unit (GANET BUS+)
D10	RED	XM receiver, Navigation unit, Navigation display unit (GANET BUS -)
D13	WHT	XM receiver (GANET AUDIO R-)
D14	GRN	XM receiver (GANET AUDIO L-)
(1) Without AcuraLink (2) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	Without AcuraLink

(2)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUDIO UNIT D (14P) CONNECTOR TERMINAL REFERENCE

Scheme 72

Cavity	Wire	Connects to
E1	BRN (1)	Auxiliary jack assembly (AUX VIDEO IN SH)
E2	LT BLU	Auxiliary jack assembly (AUX VIDEO IN GND)
E3	BRN (1)	Rear controller and screen (RR NTSC SH)
E4	YEL	Rear controller and screen (SYSTEM ACC)
E6	BRN (1)	Rear controller and screen (RR BUS SH)
E7	PUR	Rear controller and screen (RR BUS-)
E8	PUR	Auxiliary jack assembly (AUX VIDEO IN)
E9	PNK	Rear controller and screen (RR NTSC GND)
E10	BLU	Rear controller and screen (RR NTSC)
E12	BLK	Rear controller and screen (RES AUDIO OUT R)
E13	BRN (1)	Rear controller and screen (RES AUDIO OUT SH)
E14	RED	Rear controller and screen (RES AUDIO OUT L)
E15	WHT	Rear controller and screen (RES AUDIO OUT GND)
E16	LT BLU	Rear controller and screen (RR BUS+)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUDIO UNIT E (16P) CONNECTOR TERMINAL REFERENCE

Scheme 73

Cavity	Wire	Connects to
F1		Rear controller and screen (DIG AUDIO SIG)
F2		Rear controller and screen (DIG AUDIO SH)

AUDIO UNIT F (2P) CONNECTOR TERMINAL REFERENCE

Scheme 74

Cavity	Wire	Connects to
H1		Antenna, module unit (SIG)
H2		Antenna module unit (SH (AM/FM))
H3		Antenna module unit (ANT+B)

AUDIO UNIT H (3P) CONNECTOR TERMINAL REFERENCE

Stereo Amplifier Connector for Inputs and Outputs

When replacing a stereo amplifier connector, match the wires to the cavities listed in the following tables.

With navigation

Scheme 75

Scheme 75: Stereo Amplifier Connector for Inputs and Outputs

Without navigation

Scheme 76

Scheme 77

Cavity	Wire	Connects to
A1	BLU	Audio unit (RS 485-)
A2	PNK	Audio unit (RS 485 GND)
A3	LT GRN	Audio unit (+B)
A4	BLU	Audio unit (CTR PRE IN+)
A6	GRIM	Audio unit (SW PRE IN+)
A8	BRN (1)	Navigation unit (RG SH)
A9	LT BLU	Navigation unit(RG GND)
A10	GRN	Audio unit (FL PRE IN+)
A11	BLU	Audio unit (FR PRE IN+)
A13	LT BLU	Audio unit (RL PRE IN+)
A14	BRN	Audio unit (RR PRE IN+)
A15	GRN	Audio unit (RS 485+)
A16	BRN (1)	Audio unit (RS 485 SH)
A18	PNK	Audio unit (CTR PRE IN-)
A19	RED	Audio unit (SW PRE IN-)
A20	WHT	Subwoofer (SUBW SW+B)
A21	PUR	Navigation unit (RG L+)
A24	RED	Audio unit (FL PRE IN-)
A25	PNK	Audio unit (FR PRE IN-)
A27	PUR	Audio unit (RL PRE IN-)
A28	YEL	Audio unit (RR PRE IN-)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

STEREO AMPLIFIER A (28P) CONNECTOR TERMINAL REFERENCE

Scheme 78

Cavity	Wire	Connects to
A1	LT GRN	Audio unit (+B)
A3	BLU	Audio unit (CTR PRE IN+)
A4	GRN	Audio unit (SW PRE IN+)
A6	GRN	Audio unit (FL PRE IN+)
A7	BLU	Audio unit (FR PRE IN+)
A9	LT BLU	Audio unit (RL PRE IN+)
A10	BRN	Audio unit (RR PRE IN+)
A13	PNK	Audio unit (CTR PRE IN-)
A14	RED	Audio unit (SW PRE IN-)
A16	RED	Audio unit (FL PRE IN-)
A17	PNK	Audio unit (FR PRE IN-)
A19	PUR	Audio unit (RL PRE IN-)
A20	YEL	Audio unit (RR PRE IN-)

STEREO AMPLIFIER A (20P) CONNECTOR TERMINAL REFERENCE

Scheme 79

Cavity	Wire	Connects to
B1	PNK	Subwoofer (WOOFER PRE-)
B2	PNK	Front center speaker (CTR SPKR-)
B3	ORN	Right rear door speaker (RR R SPKR-)
B4	PUR	Left rear door speaker (RR L SPKR-)
B5	BLK	Right satellite speaker (R D-PLR SPKR-)
B6	BRN	Front passenger's door speaker, Right tweeter (FR R SPKR-)
B7	GRN	Driver's door speaker. Left tweeter (FR L DR SPKR-)
B8	GRY	Left satellite speaker (LD-PLR SPKR-)
B9	BLK	Ground (G504)
B10	BLU	Subwoofer (WOOFER PRE+)
B11	BLK	Front center speaker (CTR SPKR+)
B12	BLU	Right rear door speaker (RR R SPKR+)
B13	PNK	Left rear door speaker (RR L SPKR+)
B14	RED	Right satellite speaker (R D-PLR SPKR+)
B15	RED	Front passenger's door speaker, Right tweeter (FR R SPKR+)
B16	WHT	Driver's door speaker. Left tweeter (FR L DR SPKR+)
B17	BLU	Left satellite speaker (L D-PLR SPKR+)
B18	PUR	Stereo amplifier (+B)

STEREO AMPLIFIER B (18P) CONNECTOR TERMINAL REFERENCE

Scheme 80

Cavity	Wire	Connects to
B1	PUR	Left rear door speaker (RR L SPKR-)
B2	GRN	Driver's door speaker, Left tweeter (FR L DR SPKR-)
B3	GRY	Subwoofer (L D-PLR SPKR-)
B5	ORN	Right rear door speaker (RR R SPKR-)
B6	BRN	Front passenger's door speaker, Right tweeter (FR R SPKR-)
B7	PNK	Front center speaker (CTR SPKR-)
B8	BLK	Subwoofer (R D-PLR SPKR-)
B9	BLK	Ground (G504)
B10	PNK	Left rear door speaker (RR L SPKR+)
B11	WHT	Driver's door speaker, Left tweeter (FR L DR SPKR+)
B12	BLU	Subwoofer (L D-PLR SPKR+)
B14	BLU	Right rear door speaker (RR R SPKR+)
B15	RED	Front passenger's door speaker, Right tweeter (FR R SPKR+)
B16	BLK	Front center speaker (CTR SPKR+)
B17	RED	Subwoofer (R D-PLR SPKR+)
B18	PUR	Stereo amplifier (+B)

STEREO AMPLIFIER B (18P) CONNECTOR TERMINAL REFERENCE

AcuraLink Control Unit (XM Receiver) Connector for Inputs and Outputs (With AcuraLink)

When replacing an AcuraLink Control Unit (XM receiver) connector, match the wires to the cavities listed in the following tables.

With AcuraLink

Scheme 81

Scheme 81: AcuraLink Control Unit (XM Receiver) Connector for Inputs and Outputs (With AcuraLink)

Scheme 82

Cavity	Wire	Connects to
A1	WHT	XM receiver (+B)
A2	PUR	XM receiver (ACC)
A3	WHT	Navigation unit (NV RX+)
A4	GRN	Navigation unit (NV TX+)
A6	WHT	Gauge control module (CAN HI)
A7	GRN	Audio unit, Navigation unit, Navigation display unit (GANET BUS+)
A9	BLK	Audio unit (GANET AUDIO L+)
A10	RED	Audio unit (GANET AUDIO R+)
A11	BLK	Ground (G606)
A12	YEL	XM receiver (IG1)
A13	RED	Navigation unit (NV RX-)
A14	BLK	Navigation unit (NV TX-)
A15	BRN (1)	Navigation unit (NV SH)
A16	RED	Gauge control module (CAN LO)
A17	RED	Audio unit, Navigation unit, Navigation display unit (GANET BUS-)
A18	BRN (1)	Audio unit, Navigation unit, Navigation display unit (GANET BUS SH)
A19	GRN	Audio unit (GANET AUDIO L-)
A20	WHT	Audio unit (GANET AUDIO R+)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

ACURALINK CONTROL UNIT A (20P) CONNECTOR TERMINAL REFERENCE

Scheme 83

Cavity	Wire	Connects to
B2	BRN (1)	Audio unit, HandsFreeLink control unit (LINE OUT SH)
B3	LT BLU	Audio unit, HandsFreeLink control unit (LINE OUT+)
B5	LT GRN	Audio unit, HandsFreeLink control unit, Multiplex integrated control unit (B-CAN)
B6	BRN (1)	HandsFreeLink control unit, Navigation unit (HFT COMM SH)
B7	GRN	HandsFreeLink control unit, Navigation unit (HFT COMM 3)
B8	RED	Handsfreelink control unit, Navigation unit (HFT COMM 1)
B11	PUR	Audio unit, HandsFreeLink control unit (LINE OUT-)
B15	BLK	HandsFreeLink control unit. Navigation unit (HFT COMM 4)
B16	WHT	HandsFreeLink control unit, Navigation unit (HFT COMM 2)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

ACURALINK CONTROL UNIT B (16P) CONNECTOR TERMINAL REFERENCE

XM Receiver Connector for Inputs and Outputs (Without AcuraLink)

When replacing an XM receiver connector, match the wires to the cavities listed in the following tables.

Scheme 84

Scheme 84: XM Receiver Connector for Inputs and Outputs (Without AcuraLink)

XM RECEIVER CONNECTOR A (14P) (without AcuraLink)

Cavity	Wire	Connects to
A1	WHT	XM receiver (+B)
A2	RED	XM receiver (ACC)
A3	BRN (1)	Audio unit, Navigation unit, Navigation display unit (GANET BUS SH)
A5	RED	Audio unit (GANET AUDIO R+)
A6	BLK	Audio unit (GANET AUDIO L+)
A9	GRN	Audio unit, Navigation unit, Navigation display unit (GANET BUS+)
A10	RED	Audio unit, Navigation unit, Navigation display unit (GANET BUS-)
A11	BLK	Ground (G606)
A13	WHT	Audio unit (GANET AUDIO R-)
A14	GRN	Audio unit (GANET AUDIO L-)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

XM RECEIVER A (14P) CONNECTOR TERMINAL REFERENCE

Interface Dial Connector for Inputs and Outputs

When replacing an interface dial connector, match the wires to the cavities listed in the following table.

Scheme 85

Scheme 85: Interface Dial Connector for Inputs and Outputs

INTERFACE DIAL CONNECTOR (5P)

Cavity	Wire	Connects to
1	WHT	Navigation unit (JOG BUS)
2	BRN (1)	Navigation unit (JOG SH)
3	BLK	Ground (G506)
4	PUR	ACC (interface dial power supply)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

INTERFACE DIAL (5P) CONNECTOR TERMINAL REFERENCE

Auxiliary Jack Assembly Connector for Inputs and Outputs (Without rear entertainment)

When replacing an auxiliary jack assembly connector, match the wires to the cavities listed in the following table.

Scheme 86

Scheme 86: Auxiliary Jack Assembly Connector for Inputs and Outputs (Without rear entertainment)

AUXILIARY JACK ASSEMBLY CONNECTOR (5P) (Without rear entertainment)

Cavity	Wire	Connects to
1	LT BLU	Audio unit (AUX DET)
2	GRY (1)	Audio unit (SH AUX)
3	RED	Audio unit (AUX SIG GND)
4	WHT	Audio unit (AUX LCH)
5	BLK	Audio unit (AUX RCH)
(1) The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

(1)	The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray, may not match the color of the wire listed on the schematic.

AUXILIARY JACK ASSEMBLY (5P) CONNECTOR TERMINAL REFERENCE

Scheme 87

Scheme 87: Circuit Diagram

Scheme 88

Scheme 89

Scheme 90

Self-diagnostic Function

The audio system has a self-diagnostic function. To run the self-diagnostic function, do the following

Scheme 91

Scheme 91: How to check for audio system condition

Turn the ignition switch to ON (II).
Turn off the audio unit.
Push and hold the No. 1 and No. 6 buttons. While holding the buttons, push the VOL PUSH PWR knob to ON. Release the buttons and the self-diagnostic function begins.
By pressing a preset button, the input triggers the diagnostic mode that is assigned to that preset switch. "No. 3" button Entire LCD lighting/light-out mode: Turns on/off the entire LCD to show the presence or absence of an LCD segment failure. "No. 4" button Duty (for the Illumination dim) indication mode: Indicates the duty for the Illumination dim. "No. 5" button Vehicle speed pulse indication mode: Indicates the vehicle speed pulse. "6 Disc" or "DVD" button (Push and hold 5 sec.) DRAM residual quantity indication mode: Indicates the DRAM residual quantity. "AM" or "FM" button (Push and hold 5 sec.) Reception level check mode: Indicates the reception level. When entering the reception level check mode, the AM/FM or FM button is used to change the S-METER, OFFSET, MP and USN (A/I). "A.SEL/ROM" button Bus line check mode: The audio communication line is checked between the DSP, EEPROM, and TUNER.

How to Obtain the Audio Unit Serial Number

Note. This procedure can only be done when the power has been disconnected from the audio unit, and the audio unit displays CODE.

With the audio unit switched off, push and hold the preset buttons No. 1, No. 6 and the VOL PUSH PWR knob.

The audio unit will display the letter and the eight digits of the serial number (example 12345678). Use all eight digits as the serial number when using the iN (interactive network) to get the 5 digit anti-theft code.

Scheme 92

Scheme 92: How to Obtain the Audio Unit Serial Number

Display Specifications

Note. Any other diagnostic screens shown are for audio manufacturer's use only.

Scheme 93

Scheme 93: Display Specifications

Scheme 94

Scheme 94: Speaker check mode

Scheme 95

Turn the ignition switch to ON (II).
Push and hold the No. 1 and No. 3 buttons. While holding the buttons, push the VOL PUSH PWR knob to ON. Release the buttons and the speaker check mode begins. A tone or low-frequency hum should sound from one speaker.
Each time you press the SEEK or CH button, the speaker outputs a beep sound in the listed order. Display Specifications NOTE: Any other diagnostic screens shown are for the audio manufactures purpose only.
The speaker check mode ends when you turn the audio unit off, or turn the ignition switch to LOCK (0).

Error Codes

The audio system displays error codes when a problem is detected with the CD disc changer, the audio disc, the XM radio, or the anti-theft code.

CD Error Codes

Error Code Displayed	Possible Cause	Solution
DISC READ	Cannot read disc.	Eject the disc and try another one, or the disc is installed up side down.
DISC ERROR	There is a problem with the disc player. A common problem is disc labels coming off the disc while in the player.	Try to eject the disc and try another one. If there is still a problem, replace the navigation unit or audio unit.
HEAT ERROR	Disc player is hot. This can happen if the vehicle is parked out in the hot sun all day.	Park the vehicle in a cooler place for a while and try the disc player again. If the error code is still present, try another disc. If the error code is still present, replace the navigation unit or audio unit.
Focus Error	Possibly DVD inserted in unit, or CD installed up side down.	Eject CD and try a known-good CD.
File Error	Audio unit cannot read the files on the CD or CD-R.	Verify that CD/CD-R file names end in "CDA" or "WMA." Verify that CD-R discs with compressed music formats end in "MP3" or "WMA." Other file formats like l-tunes or "Ogg" are not recognized. WMA files may have (DRM) copy protection and cannot be read.
Mech Error	CD label jammed in the mechanism. CD eject mechanism or motor is inoperative. CD spindle motor won't spin up the CD.	Press the EJECT button and hold it for 5 seconds. If the CD does not eject, try again. If the CD still won't eject, replace the unit.

CD ERROR CODES CHART

XM Error Codes

Error Code Displayed	Possible Cause	Solution
LOADING	XM radio is acquiring audio or program information.	Wait until the radio receives the information.
OFF AIR	XM channel not in service.	Try another XM channel.
NO SIGNAL	Loss of signal.	Both terrestrial and satellite antennas have lost signal. Park the vehicle outside with a clear view of the southern horizon.
UPDATING	XM radio is receiving information update from the network.	This message will disappear once the update finishes.
CHECK ANTENNA	XM antenna error.	Repair open or short in the satellite antenna. Substitute the XM antenna with a known-good one, and recheck. if the error is gone, replace the original XM antenna. If the error is still present, replace the antenna lead.
ANTENNA ERROR	XM antenna error.
	No signal from XM.	Check a known-good vehicle with XM radio. If the known-good vehicle has the same symptoms, contact XM satellite radio at (800) 852-9696.

XM ERROR CODES CHART

Audio Unit Error Codes

Error Code Displayed	Possible Cause	Solution
CODE ERROR E	Anti-theft code mismatch (1st try).	Enter the correct anti-theft code.
CODE ERROR 1	Anti-theft code mismatch (10th try).	Remove fuse No. 5 (10 A) in the under-dash fuse/ relay box, then reinsert it. You will have 10 more tries to enter the correct anti-theft code.

AUDIO UNIT ERROR CODES CHART

Poor AM or FM radio reception or interference

Note. Check the radio reception in an open area. Poor reception/interference can be caused by any of these conditions. The radio station is far away. A tall buildings, mountains, or a high-voltage power lines are nearby. Check the connectors for poor connections or loose terminals. After market window tint. Check the vehicle battery condition first.

Scheme 96

Scheme 96: Poor AM or FM radio reception or interference

Scheme 97

Scheme 98

Scheme 99

Scheme 100

Scheme 101

Scheme 102

Scheme 103

Turn the ignition switch to ON (II).
Do the seek stop test (see «SEEK STOP TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__seek-stop-test) ).and the reception level indication in the Self-diagnostic Function (See «SELF-DIAGNOSTIC FUNCTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__self-diagnostic-function) ). Is the test vehicle within 10 % of the known-good vehicle? YES - Multipath interference or weak station. Operation is normal. NO - Go to step 3.
Check if the radio reception/interference is the same in several locations. Is the reception/interference the same? YES - Go to step 4. NO - Multipath interference or weak station. Operation is normal.
Check the reception/interference while the engine is running. Is there noise (static or whine) only with the engine running? YES - Check the antenna and radio grounds. If OK, check the charging system and the ignition system. NO - Go to step 5.
Turn the ignition switch to LOCK (0).
Remove the tailgate spoiler trim (see «TAILGATE SPOILER TRIM REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#exterior-trim__tailgate-spoiler-trim-replacement) ).
Touch one tester probe to the antenna element 1P connector No. 1 terminal, and the other tester probe at the antenna element to check for continuity. Is there continuity? YES - Go to step 8. NO - Replace rear spoiler trim.
Go into the self-diagnostic mode and use the Tuner communication check mode (see «SELF-DIAGNOSTIC FUNCTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__self-diagnostic-function) ). Is the tuner communication OK? YES - Go to step 9. NO - Audio unit is faulty, replace the audio unit.
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). Check that the AM/FM antenna lead and sub-lead are properly connected. Are they connected properly? YES - Go to step 10. NO - Reconnect the connector, and recheck the function.
Disconnect the AM/FM antenna amplifier 3P connector.
Turn the ignition switch to ON (II).
Turn on the audio unit and select AM or FM.
Measure the voltage between AM/FM antenna amplifier 3P connector No. 3 terminal and body ground. Is there battery voltage? YES - Go to step 20 . NO - Go to step 15 .
Turn the ignition switch to LOCK (0).
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Disconnect audio unit connector H (3P).
Check for continuity between the audio unit connector H (3P) No. 3 terminal and AM/FM antenna amplifier 3P connector No. 3 terminal. Is there continuity? YES - Go to step 18. NO - Repair open in the wire between audio unit and the AM/FM antenna amplifier. Also check the antenna lead/sublead connector.
Check for continuity between the audio unit connector H (3P) No. 3 terminal and body ground. Is there continuity? YES - Repair short to body ground in the wire between audio unit and the AM/FM antenna amplifier. NO - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Turn the ignition switch to LOCK (0).
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Disconnect audio unit connector H (3P).
Check for continuity between the audio unit connector H (3P) No. 1 terminal and AM/FM antenna amplifier 3P connector No. 1 terminal. Is there continuity? YES - Go to step 23. NO - AM/FM antenna lead and/or sublead is faulty, replace the AM/FM antenna lead and/or sublead.
Check for continuity between the audio unit connector H (3P) No. 1 terminal and body ground. Is there continuity? YES - AM/FM antenna lead and/or sublead is faulty, replace the AM/FM antenna lead and/or sublead. NO - Go to step 24.
Check for continuity between the audio unit connector H (3P) No. 2 terminal and AM/FM antenna amplifier 3P connector No. 2 terminal. Is there continuity? YES - Go to step 25. NO - AM/FM antenna lead and/or sublead is faulty, replace the AM/FM antenna lead and/or sublead.
Check for continuity between the audio unit connector H (3P) No. 1 and No. 2 terminals. Is there continuity? YES - Replace the AM/FM antenna and recheck. If the reception is still poor, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - AM/FM antenna lead and/or sublead is faulty, replace the AM/FM antenna lead and/or sublead.

Power switch will not turn ON (No information display and no sound)

Note. Check the vehicle battery condition first. Check the connectors for poor connections or loose terminals.

Scheme 104

Scheme 104: Power switch will not turn ON (No information display and no sound)

Scheme 105

Turn the ignition switch to ON (II).
Push the power switch ON to see if audio unit turns ON. Does the audio unit display operate properly, and the audio unit sound normal? YES - Intermittent failure, the system is OK at this time. NO - Go to step 3.
Turn the ignition switch to LOCK (0).
Check the No. 5(10 A) fuse and No. 32 (10 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 5. NO - Replace the fuse, and recheck.
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). Check that the audio unit connectors are properly connected. Is it connected properly? YES - Go to step 6. NO - Repair poor connections and reconnect the connector, and recheck the function.
Disconnect the audio unit connector A (17P). NOTE: Eject all the CDs before disconnecting the audio unit and CD changer to prevent damaging the CD player's load mechanism.
Turn the ignition switch to ON (II).
Measure the voltage between No. 14 and No. 17 terminals of audio unit connector A (17P) and body ground. Is there battery voltage? YES - Go to step 9. NO - Repair open in the wire(s) between the No. 5 (10 A) and No. 32(10 A) fuses in the under-dash fuse/relay box and the audio unit.
Reconnect the audio unit connector A (17P).
Measure the voltage between audio unit connector A (17P) No. 9 terminal and body ground. Is there less than 0.1 V? YES - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Repair open in the wire between the audio unit connector A (17P) No. 9 terminal and body ground (G504) (see «DASHBOARD WIRE HARNESS (VIEW OF PASSENGER'S SIDE)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__dashboard-wire-harness-view-of-passengers) ).

Audio unit power will not turn OFF

Note. Check for aftermarket accessories plugged into the vehicle accessory power sockets. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Scheme 106

Scheme 106: Audio unit power will not turn OFF

Turn the ignition switch to ON (II).
With the ignition switch ON (II), push the power switch OFF or turn the ignition switch to LOCK (0) to see if the audio unit turns OFF. Does the audio unit turn OFF? YES - Operation is normal. NO - Go to step 3.
Turn the ignition switch to LOCK (0).
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). Disconnect the audio unit connector A (17P). NOTE: Eject all the CDs before disconnecting the audio unit and CD changer to prevent damaging the CD player's load mechanism.
Measure the voltage between the No. 14 terminal of audio unit connector A (17P) and body ground. Is there battery voltage? YES - Check for short to power on the PUR wire. NO - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Note. Set the fader and balance positions to the center. On vehicles equipped with navigation and HandsFreeLink verify the voice systems are not activated. Press each system's back button to return the audio unit to the normal operating mode. Check the vehicle battery condition first. Check the connectors for poor connections or loose terminals.

Scheme 107

Scheme 107: No sound is heard from speaker(s) (display is normal) (with navigation)

Scheme 108

Scheme 109

Scheme 110

Scheme 111

Scheme 112

Scheme 113

Scheme 114

Scheme 115

Scheme 116

Scheme 117

Scheme 118

Scheme 119

Scheme 120

Scheme 121

Turn the ignition switch to ON (II).
Turn on the audio unit and make sure the volume button is not set to the MIN level. Is it at the MIN level? YES - Raise the volume level, and recheck the function. NO - Go to step 3.
On the steering wheel, check the navigation talk command, and/or the HandsFreeLink talk command functions. Are the navigation talk command and/or the HFL talk command functions set? YES - Cancel the navigation talk command by pressing the navigation BACK button, and for the HFL talk command, press the HFL BACK button, then recheck the function. NO - Go to step 4.
Do the speaker(s) check mode with the self-diagnostic function (see «SPEAKER CHECK MODE»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Did all speakers produce a tone? YES - Go to step 11 . NO - Go to step 5.
Check the subwoofer for tone. Did the subwoofer make a tone? YES - Go to step 6. NO - Go to step 29 .
Turn the ignition switch to LOCK (0).
Check the faulty speaker(s) for damage. Is there any damage? YES - Replace the speaker and recheck. NO - Go to step 8.
Remove the faulty speaker(s) that has no sound (see «SPEAKER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ), and disconnect its connector.
Check the speaker(s) connector for a loose or poor connection. Reconnect the speaker connector, and recheck the symptom; is the condition still present? YES - Go to step 10. NO - Intermittent failure. Operation is normal.
Test the speaker(s) (see «SPEAKER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Is the speaker OK? YES - Go to step 11. NO - Replace the speaker(s).
Do the audio unit self-diagnostic function DSP unit communication check (see «SELF-DIAGNOSTIC FUNCTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__self-diagnostic-function) ). Is the DSP communication OK? YES - Go to step 12. NO - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Disconnect stereo amplifier connector B (18P).
Turn the ignition switch to ON (II).
Measure the voltage between stereo amplifier connector B (18P) No. 18 terminal and body ground. Is there battery voltage? YES - Go to step 15. NO - Repair open in the wire between the No. 8 (30 A) fuse in the under-dash fuse/relay box and stereo amplifier connector B (18P) No. 18 terminal.
Disconnect stereo amplifier connector A (28P).
Measure the voltage between stereo amplifier connector A (28P) No. 3 terminal and body ground. Is there battery voltage? YES - Go to step 17. NO - Repair open in the wire between the stereo amplifier connector A (28P) No. 3 terminal and audio unit connector B (32P) No. 23 terminal.
Reconnect the stereo amplifier connector B (18P).
Measure the voltage between stereo amplifier connector B (18P) No. 9 terminal and body ground. Less than 0.1 V? YES - Go to step 19. NO - Repair open to the body ground in the wire between the stereo amplifier connector B (18P) No. 9 terminal and body ground (G504) (see «DASHBOARD WIRE HARNESS (VIEW OF PASSENGER'S SIDE)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__dashboard-wire-harness-view-of-passengers) ).
Disconnect stereo amplifier connector B (18P) and speaker connector.
Check for continuity between body ground and stereo amplifier connector B (18P) according to the table. CONNECTOR TERMINAL REFERENCE Speaker Stereo amplifier connector Wire color Front center speaker B11 (+) BLK B2 (-) PNK Driver's door speaker, Left tweeter B16 (+) WHT B7 (-) GRN Front passenger's door speaker, Right tweeter B15 (+) RED B6 (-) BRN Left rear door speaker B13 (+) PNK B4 (-) PUR Right rear door speaker B12 (+) BLU B3 (-) ORN Left satellite speaker B17 (+) BLU B8 (-) GRY Right satellite speaker B14 (+) RED B5 (-) BLK Subwoofer B10 (+) BLU B1 (-) PNK Is there continuity? YES - Repair short in the wire(s) between the stereo amplifier and the speaker(s). NO - Go to step 21.
Measure the resistance between stereo amplifier connector B (18P) according to the table. CONNECTOR TERMINAL REFERENCE Speaker Stereo amplifier connector Wire color Front center speaker B11 (+) BLK B2 (-) PNK Driver's door speaker, Left tweeter B16 (+) WHT B7 (-) GRN Front passenger's door speaker, Right tweeter B15 (+) RED B6 (-) BRN Left rear door speaker B13 (+) PNK B4 (-) PUR Right rear door speaker B12 (+) BLU B3 (-) ORN Left satellite speaker B17 (+) BLU B8 (-) GRY Right satellite speaker B14 (+) RED B5 (-) BLK Subwoofer B10 (+) BLU B1 (-) PNK Resistance Front center speaker: 4 ohms Driver's door speaker, Left tweeter: 2 ohms Front passenger's door speaker, Right tweeter: 2 ohms Left rear door speaker: 2 ohms Right rear door speaker: 2 ohms Left satellite speaker: 4 ohms Right satellite speaker: 4 ohms Subwoofer: 2 ohms Is the resistance the same as indicated? YES - Go to step 22. NO - Repair open in the wire between the stereo amplifier and the speaker(s).
Disconnect audio unit connector B (32P).
Check for continuity between the following terminals of the stereo amplifier connector A (28P) and audio unit connector B (32P). CONNECTOR TERMINAL REFERENCE Stereo amplifier connector Audio unit connector Wire color A1 B6 BLU A2 B20 PNK A15 B5 GRN Is there continuity? YES - Go to step 24. NO - Repair open in the wire between the stereo amplifier and audio unit.
Check for continuity between the terminals of stereo amplifier connector A (28P) according to the table. CONNECTOR TERMINAL REFERENCE From terminal To terminal A2 A1, A15 A16 A1, A15 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between audio unit and stereo amplifier (replace appropriate shield harness). NO - Go to step 25.
Check for continuity between body ground and stereo amplifier connector A (28P) terminal No. 1, 2, and 15 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between stereo amplifier and audio unit (replace the appropriate shielded harness). NO - Go to step 26.
Check for continuity between audio unit connector B (32P) and stereo amplifier connector A (28P) according to the table. CONNECTOR TERMINAL REFERENCE Audio unit connector Stereo amplifier connector Wire color B32 A4 BLU B16 A18 PNK B24 A10 GRN B8 A24 RED B26 A11 BLU B10 A25 PNK B27 A13 LT BLU B11 A27 PUR B29 A14 BRN B13 A28 YEL B14 A19 RED B30 A6 GRN Is there continuity? YES - Go to step 27. NO - Repair open in the appropriate wire(s) between the audio unit and stereo amplifier.
Check for continuity between stereo amplifier connector A (28P) and body ground according to the table. CONNECTOR TERMINAL REFERENCE stereo amplifier connector Wire color A4 BLU A18 PNK A10 GRN A24 RED A11 BLU A25 PNK A13 LT BLU A27 PUR A14 BRN A28 YEL A19 RED A6 GRN Is there continuity? YES - Repair short body ground in the wire(s) between the audio unit and stereo amplifier. NO - Go to step 28.
Check for continuity between the terminals of stereo amplifier connector A (28P) according to the table. CONNECTOR TERMINAL REFERENCE From terminal To terminals A4 A18, A10, A24, A11, A25, A13, A27, A14, A28, A6, A19 A18 A10, A24, A11, A25, A19, A13, A27, A14, A28, A6 A10 A24, A11, A25, A13, A6, A27, A14, A28, A19 A24 A11, A25, A13, A27, A6, A14, A28, A19 A11 A25, A13, A27, A14, A6, A28, A19 A25 A13, A17, A14, A28, A6, A19 A13 A27, A14, A28, A6, A19 A27 A14, A28, A6, A19 A14 A28, A6, A19 A6 A28, A19 A19 A28 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between audio unit and stereo amplifier (replace appropriate shield harness). NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good stereo amplifier and recheck. If the symptom indicated goes away, replace the original stereo amplifier (see «STEREO AMPLIFIER REMOVAL/ INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).
Disconnect the subwoofer 8P connector.
Measure the voltage between subwoofer 8P connector No. 5 terminal and body ground. Is there battery voltage? YES - Go to step 31. NO - Repair open in the between the subwoofer 8P connector No. 5 terminal and No. 12 (10 A) fuse in the under-dash fuse/relay box.
Turn the ignition switch to ON (II).
Measure the voltage between subwoofer 8P connector No. 6 terminal and body ground. Is there battery voltage? YES - Go to step 33. NO - Repair open in the between the stereo amplifier connector A (28P) No. 20 terminal and subwoofer 8P connector No. 6 terminal.
Check for continuity between body ground and subwoofer 8P connector No. 6 terminal. Is there continuity? YES - Repair short to body ground in the wire(s) between the stereo amplifier and subwoofer. NO - Go to step 34.
Turn the ignition switch to LOCK (0).
Check for continuity between subwoofer 8P connector No. 4 terminal and body ground. Is there continuity? YES - Go to step 6 . NO - Repair open to the body ground in the wire between the subwoofer 8P connector No. 4 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).

Note. Set the fader and balance positions to the center. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Scheme 122

Scheme 122: No sound is heard from speaker(s) (display is normal) (without navigation)

Scheme 123

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

Scheme 129

Turn the ignition switch to ON (II).
Turn on the audio unit and make sure the volume button is not set to the MIN level. Is it at the MIN level? YES - Raise the volume level, and recheck the function. NO - Go to step 3.
Do the speaker check mode with the self-diagnostic function (see «SPEAKER CHECK MODE»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Did all speakers produce a tone? YES - Go to step 9 . NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Check the faulty speaker(s) for damage. Is there any damage? YES - Replace the speaker and recheck. NO - Go to step 6.
Remove the speaker(s) that has no sound (see «SPEAKER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ), and disconnect its connector.
Check the speaker connector for a loose or poor connection. Reconnect the speaker connector, and recheck the symptom; is the condition still present? YES - Go to step 8. NO - Intermittent failure. Operation is normal.
Test the speaker(s) (see «SPEAKER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Is the speaker OK? YES - Go to step 9. NO - Replace the speaker(s).
Do the audio unit self-diagnostic function DSP unit communication check (see «SELF-DIAGNOSTIC FUNCTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__self-diagnostic-function) ). Is the DSP communication OK? YES - Go to step 10. NO - Audio unit is faulty, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Disconnect stereo amplifier connector B (18P). NOTE: Eject all the CDs before disconnecting the audio unit and CD changer to prevent damaging the CD player's load mechanism.
Turn the ignition switch to ON (II).
Measure the voltage between stereo amplifier connector B (18P) No. 18 terminal and body ground. Is there battery voltage? YES - Go to step 13. NO - Repair open in the between No. 8 (30 A) fuse in the under-dash fuse/relay box and stereo amplifier connector B (18P) No. 18 terminal.
Disconnect stereo amplifier connector A(20P).
Measure the voltage between stereo amplifier connector A (20P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 15. NO - Repair open in the between the stereo amplifier connector A (20P) No. 1 terminal and audio unit connector B (32P) No. 23 terminal.
Reconnect the stereo amplifier connector B (18P).
Measure the voltage between stereo amplifier connector B (18P) No. 9 terminal and body ground. Is there less than 0.1 V? YES - Go to step 17. NO - Repair open to the body ground in the wire between the stereo amplifier connector B (18P) No. 9 terminal and body ground (G504) (see «DASHBOARD WIRE HARNESS (VIEW OF PASSENGER'S SIDE)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__dashboard-wire-harness-view-of-passengers) ).
Check for continuity between audio unit connector B (32P) and stereo amplifier connector A (20P) according to the table. CONNECTOR TERMINAL REFERENCE Audio unit connector Stereo amplifier connector Wire color B32 A3 BLU B16 A13 PNK B24 A6 GRN B8 A16 RED B26 A7 BLU B10 A17 PNK B27 A9 LT BLU B11 A19 PUR B29 A10 BRN B13 A20 YEL B30 A4 GRN B14 A14 RED Is there continuity? YES - Go to step 18. NO - Repair open in the appropriate wire(s) between the audio unit and stereo amplifier.
Disconnect stereo amplifier connector B (18P) and speaker connector.
Check for continuity between body ground and stereo amplifier connector B (18P) according to the table. CONNECTOR TERMINAL REFERENCE Speaker Stereo amplifier connector Wire color Front center speaker B16 (+) BLK B7 (-) PNK Driver's door speaker. Left tweeter B11 (+) WHT B2 (-) GRN Front passenger's door speaker, Right tweeter B15 (+) RED B6 (-) BRN Left rear door speaker B10 (+) PNK B1 (-) PUR Right rear door speaker B14 (+) BLU B5 (-) ORN Subwoofer B12 (+) BLU B3 (-) GRY B17 (+) RED B8 (-) BLK Is there continuity? YES - Repair short in the wire(s) between the stereo amplifier and the speaker(s). NO - Go to step 20.
Measure the resistance between stereo amplifier connector B (18P) according to the table. CONNECTOR TERMINAL REFERENCE Speaker Stereo amplifier connector Wire color Front center speaker B16 (+) BLK B7 (-) PNK Driver's door speaker, Left tweeter B11 (+) WHT B2 (-) GRN Front passenger's door speaker, Right tweeter B15 (+) RED B6 (-) BRN Left rear door speaker B10 (+) PNK B1 (-) PUR Right rear door speaker B14 (+) BLU B5 (-) ORN Subwoofer B12 (+) BLU B3 (-) GRY B17 (+) RED B8 (-) BLK Resistance Front center speaker: 4 ohms Driver's door speaker. Left tweeter: 2 ohms Front passenger's door speaker, Right tweeter: 2 ohms Left rear door speaker: 2 ohms Right rear door speaker: 2 ohms Subwoofer: 2 ohms Is the resistance the same as indicated? YES - Go to step 21. NO - Repair open in the wire between the stereo amplifier and the speaker(s).
Check for continuity between stereo amplifier connector A (20P) and body ground according to the table. CONNECTOR TERMINAL REFERENCE stereo amplifier connector Wire color A3 BLU A13 PNK A6 GRN A16 RED A7 BLU A17 PNK A9 LT BLU A19 PUR A10 BRN A20 YEL A14 RED A4 GRN Is there continuity? YES - Repair short to body ground in the wire(s) between the audio unit and stereo amplifier. NO - Go to step 22.
Check for continuity between the terminals of stereo amplifier connector A (20P) according to the table. CONNECTOR TERMINAL REFERENCE From terminal To terminals A3 A13, A6, A16, A7, A17, A9, A19, A10, A20 A13 A6, A16, A7, A17, A9, A19, A10, A20 A6 A16, A7, A17, A9, A19, A10, A20 A16 A7, A17, A9, A19, A10, A20 A7 A17, A9, A19, A10, A20 A17 A9, A19, A10, A20 A9 A19, A10, A20 A19 A10, A20 A10 A20 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between audio unit and stereo amplifier (replace appropriate shield harness). NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good stereo amplifier and recheck. If the symptom indicated goes away, replace the original stereo amplifier (see «STEREO AMPLIFIER REMOVAL/ INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).

Note. Check the connectors for poor connection or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and check for sound in each mode (AM, FM, XM, and CD). Is there sound from the speakers, and is the sound quality normal in each mode? YES - Intermittent failure. The system is OK at this time. Check for loose connections at the audio unit, the amplifier, and each speaker. NO - Speakers all work, sound quality is poor. If sound quality is poor only with the XM radio, or the XM radio does not function, go to «POOR OR NO SOUND WITH THE XM RADIO»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__poor-or-no-sound-with-xm) . If the sound quality is poor only with AM or FM, go to «POOR RADIO RECEPTION OR INTERFERENCE»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__poor-am-or-fm-radio-reception) ). If the sound is poor in all modes, go to «SOUND QUALITY DIAGNOSIS»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__sound-quality-diagnosis) .

Radio preset memory is lost

Note. If only XM stations are lost, go to XM radio preset memory is lost (with AcuraLink) or XM radio preset memory is lost (without AcuraLink) ). Check the vehicle battery condition first.

Scheme 130

Scheme 130: Radio preset memory is lost

Scheme 131

Turn the ignition switch to ON (II).
Turn on the audio unit and set each of the radio station preset buttons. Do each of the preset buttons set properly? YES - Go to step 3. NO - Go to step 5 .
Turn the ignition switch to LOCK (0) for 1 minute, then turn it back to ON (II).
Test all the preset buttons for proper recall operation. Do the preset buttons recall the set radio stations? YES - System is normal at this time. Check connections at the audio unit. NO - Go to step 5.
Inspect No. 5 (10 A) fuse in the under-dash fuse/ relay box. Is it OK? YES - Go to step 6. NO - Replace the fuse and reset. If it fails again, repair the short to ground in the harness.
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Turn the ignition switch to ON (II).
Measure the voltage between the audio unit connector A (17P) No. 17 terminal and body ground. Is there battery voltage? YES - Go to step 9. NO - An open wire between the under-dash fuse/ relay box and audio unit A17 terminal.
Measure the voltage between the audio unit connector A (17P) No. 9 terminal and body ground. Is there less than 0.1 V? YES - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - An open wire between the audio unit connector A (17P) No. 9 terminal and body ground (G504).

Volume does not change

Note. Set the fader and balance positions to the center. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and check for sound in each mode (AM, FM, XM, and CD). Is the sound normal ? YES - Go to step 3. NO - Go to «AUDIO SYSTEM SOUND IS WEAK OR DISTORTED»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) (see ), or no sound is heard from speakers (see «NO SOUND IS HEARD FROM SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION)»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__no-sound-is-heard-from-speakers) ).
Operate the volume knob to see if the volume changes. Does the volume change? YES - Operation is normal at this time. NO - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Volume does not increase with speed

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Verify the (SVC) mode setting in the navigation or audio unit sound set-up. Is the (SVC) set to off? YES - Change the setting to Mid and reset (see «SYSTEM DESCRIPTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). NO - Go to step 2.
Do the self-diagnostic function for the vehicle speed pulse indication (see «SELF-DIAGNOSTIC FUNCTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__self-diagnostic-function) ). Does the self-diagnostic function indicate a VSP signal? YES - Substitute a known-good navigation or audio unit and retest. If the symptom/indication goes away, replace the original navigation or audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Go to step 3.
Check for B-CAN codes with the HDS. Are there any B-CAN codes? YES - Go to the applicable B-CAN code troubleshooting. NO - Go to step 4.
Inspect the VSP signal in the navigation system (see «CAR STATUS»(/acura/mdx/ii-2006-2010/remont/navigation-system/#navigation-system__car-status) ). Does the VSP change from 0 to 1 when the vehicle is moving? YES - Substitute a known-good audio unit, then retest the VSP signal in the audio self-diagnostic test. If the speed is shown, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If so speed is shown, substitute a known-good navigation unit. NO - Inspect the VSP circuit (see «NAVIGATION UNIT INPUTS AND OUTPUTS FOR CONNECTOR C (8P)»(/acura/mdx/ii-2006-2010/remont/navigation-system/#navigation-system) ).

Volume is too high or too low when driving at freeway speeds

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Test-drive the vehicle at highway speeds, and monitor volume level. Is the volume level too high or too low? YES - Go to step 2. NO - Intermittent failure, the system is OK at this time.
Change the (SVC) mode setting in sound set-up to Mid (see «SYSTEM DESCRIPTION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Is the volume level still too high, or too low? YES - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Improper (SVC) setting for clients sound taste.

Radio tuner does not change stations

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and check the audio information on the display panel. Does the audio information display properly? YES - Go to step 3. NO - Go to audio unit power switch will not turn ON (see «POWER SWITCH WILL NOT TURN ON (NO INFORMATION DISPLAY AND NO SOUND)»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__power-switch-will-not-turn-on) ).
Operate the tuning knob to see if the radio station changes. Does the radio station change? YES - Intermittent failure, the turning knob is OK at this time. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Display does not dim or brighten with dimmer

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Scheme 132

Scheme 132: Display does not dim or brighten with dimmer

Scheme 133

Scheme 134

Scheme 135

Scheme 136

Turn the ignition switch to ON (II).
Turn the headlight switch to the parking or headlight on position.
Check the display of the climate control unit. Does the climate control illumination change with dimmer? YES - Go to step 4. NO - Go to climate control power and ground circuit troubleshooting (see «CLIMATE CONTROL UNIT TROUBLESHOOTING»(/acura/mdx/ii-2006-2010/remont/automatic-hvac-system/#climate-control-system) ).
Check the No. 7 (10 A) fuse and the No. 32 (10 A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 5. NO - Replace the fuse, and recheck.
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). Check that the audio unit and climate control unit connectors are properly connected. Are they connected properly? YES - Go to step 6. NO - Repair poor connections and reconnect the connector, and recheck the function.
Turn the ignition switch to LOCK (0).
Disconnect audio unit connector C (24P) and climate control unit connector B (14P).
Check for continuity between the audio unit connector C (24P) No. 24 terminal and climate control unit connector B (14P) No. 8 terminal. Is there continuity? YES - Go to step 9. NO - Repair open in the wire between the audio unit connector C (24P) No. 24 terminal and climate control unit connector B (14P) No. 8 terminal.
Check for continuity between the body ground and audio unit connector C (24P) No. 24 terminal. Is there continuity? YES - Repair short to body ground in the wire(s) between the audio unit and climate control unit. NO - Go to step 10.
Disconnect climate control unit connector A (40P).
Measure the voltage between No. 1 terminal of climate control unit connector A (40P) and body ground. Is there battery voltage? YES - Go to step 12. NO - Repair open in the wire(s) between No. 7 (10 A) fuse in the under-dash fuse/relay box and the climate control unit.
Turn the ignition switch to ON (II).
Measure the voltage between No. 25 terminal of climate control unit connector A (40P) and body ground. Is there battery voltage? YES - Go to step 14. NO - Repair open in the wire(s) between the 32 (10 A) fuse in the under-dash fuse/relay box and the climate control unit.
Turn the ignition switch to LOCK (0).
Reconnect the audio unit connector A (17P).
Turn the ignition switch to ON (II).
Measure the voltage between climate control unit connector A (40P) No. 37 terminal and body ground. Is there less than 0.1 V? YES - Substitute a known-good climate control unit, and recheck. If the symptom/indicated goes away, replace the original climate control unit. If the symptom is still present, substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Repair open in the wire between the climate control unit connector A (40P) terminal No. 37 and body ground (G506) (see «DASHBOARD WIRE HARNESS (VIEW OF PASSENGER'S SIDE)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__dashboard-wire-harness-view-of-passengers) ).

Audio unit button illumination does not work

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn the combination lighting switch to the parking light position.
Check the illumination of the audio unit buttons. Are the buttons illuminated? YES - All buttons illuminated: Intermittent problem: the audio unit is OK at this time. Check for loose or poor connections at the audio unit connector C (24P). Some button(s) illuminated: Audio panel is faulty, replace the audio panel. NO - Go to step 4.
Check the illumination of several other buttons not related to the audio system. Are the buttons illuminated? YES - Go to the B-CAN line troubleshooting (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(/acura/mdx/ii-2006-2010/remont/communication-devices/#multiplex-integrated-control-system__troubleshooting-b-can-system-diagnosis-test) ). If the B-CAN line is OK, substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/indicated goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Troubleshoot the interior lights. Start by checking the No. 22 (7.5 A) fuse in the under-hood fuse/relay box. If the fuse is OK, check the interior light relay.

Audio disc does not load

Note. Disc labels should not be used in the audio unit. They may damage the player mechanism. Make sure the CD disc is compatible with the system (see the owner's manual for more information). Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and insert known-good disc to see if the symptom can be duplicated. Does the disc load? YES - Operation is normal. If the disc loads normally, but will not play, go to «AUDIO DISC DOES NOT PLAY»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-disc-does-not-play) . NO - Go to step 3.
Insert another disc. Does the disc load? YES - The original disc is faulty. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Audio disc does not eject

Note. Disc labels should not be used in the audio unit. They may damage the player mechanism. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit. Does the system turn on? YES - Go to step 3. NO - Go to audio unit power switch will not turn ON (see «POWER SWITCH WILL NOT TURN ON (NO INFORMATION DISPLAY AND NO SOUND)»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__power-switch-will-not-turn-on) ).
Check to see if the disc ejects correctly with no binding by pushing the EJECT button. Does the disc eject properly? YES - Operation is normal. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Audio disc changer does not load all six discs

Note. Disc labels should not be used in the audio unit. They may damage the player mechanism. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and try loading six discs into the audio unit/CD changer. Does the audio unit accept all six discs? YES - Intermittent failure, the audio unit is OK at this time. NO - Go to step 3.
Try loading the disc player with six known-good discs. Does the audio unit/CD changer accept all six discs? YES - At least one of the original discs is faulty. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Audio disc changer does not move between discs

Note. Disc labels should not be used in the audio unit. They may damage the player mechanism. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and insert six discs into the audio unit/CD changer and see if the changer moves between discs. Does the changer operate normally? YES - Intermittent failure, the disc changer is OK at this time. NO - Go to step 3.
Insert six known-good discs into the audio unit. Does the changer operate normally? YES - At least one of the original discs is faulty. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Special tools required

Diagnostics CD 07AAZ-SDBA100

Audio disc does not play

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Turn on the audio unit and try loading a disc. Does the disc load? YES - Go to step 3. NO - Go to «DISC DOES NOT LOAD»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-disc-does-not-load) .
Insert another audio disc to see if the symptom can be duplicated. Does the disc play? YES - Operation is normal. NO - Go to step 4.
Insert audio diagnostic CD (T/N 07AAZ-SDBA100) in the audio unit. Does the disc play? YES - The original disc is faulty or has an unreadable format. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Special tools required

Diagnostics CD 07AAZ-SDBA100
Skip test CD 07AAZ-SDBA200
Skip test CD 07AAZ-SDBA300

Audio disc skips

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Turn the ignition switch to ON (II).
Confirm the vehicle's tires are properly inflated.
Check the client's disc for scratches and fingerprints. NOTE: The following test should be done with the audio unit bass and treble set to the client's listening settings. When comparing to known-good vehicles, do the comparison on the same model and trim level.
Test-drive the vehicle to identify when the client's disc skips. The audio diagnostic CD (T/N 07AAZ-SDBA100) can be used if the client's disc is not available; use tracks 10-12. Does the disc skip? YES - Go to step 5. NO - Operation is normal.
Compare the client's skipping disc that skips to a known-good vehicle under the same conditions. Does the disc skip in the known-good vehicle under the same conditions? YES - The CD player operation is normal, the problem is with the client's disc. NO - Go to step 6. NOTE: Do the following test with vehicle parked and the engine running.
Insert the diagnostic skip test CD (T/N 07AAZ-SDBA300). Play tracks 2-11, and note on which number track(s) the disc starts skipping. Do the same test on a known-good vehicle. Does the disc skip on same track(s) as the known-good vehicle? YES - Operation is normal. NO - Go to step 7.
Insert the diagnostic skip test CD (T/N 07AAZ-SDBA200). Play tracks 7-11 and tracks 13-15 and note on which number track(s) where the disc starts skipping. Do the same test on a known-good vehicle. Does the disc skip on same track number(s) as the known-good vehicle? YES - Operation is normal. NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Error code: XM NO SIGNAL or XM ANTENNA is displayed

Note. Check XM radio reception in an open area. Poor reception/interference can be caused by tall buildings, mountains, or high-voltage power lines. If you can only tune to channel 000,001,174 and 247, make sure the audio unit is set to channel mode (see ), if it is set to channel mode, call XM radio customer support and check the account activation status. If you replace the XM receiver, the Acuralink must be reactivated by Acura Client Services. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Scheme 137

Scheme 137: Error code: XM NO SIGNAL or XM ANTENNA is displayed

Scheme 138

Scheme 139

Scheme 140

Park vehicle outside with a clear view of the southern horizon.
Turn the ignition switch to ON (II).
Turn on the audio unit and select XM radio. Does the XM radio receive a signal? YES - Reception interference operation is normal. NO - With AcuraLink: Go to step 5 . Without AcuraLink: Go to step 12 .
Turn the ignition switch to LOCK (0).
Check the XM antenna 2P connector and the XM receiver (AcuraLink control unit) connector C (2P). Are the connectors connected? YES - Go to step 6. NO - Reconnect XM antenna 2P connector and XM receiver (AcuraLink control unit) connector C (2P), recheck XM radio operation. If the signal is restored, operation is normal. If signal is not restored go to step 6.
Disconnect XM receiver (AcuraLink) connector A (20P).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between No. 5 (10 A) fuse in the under-dash fuse/relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal.
Reconnect the XM receiver (AcuraLink control unit) connector A (20P).
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground. Is there less than 0.1 V? YES - Go to step 11. NO - Repair open in the wire between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).
Substitute known-good XM antenna. Does the XM radio receiver a signal? YES - Replace XM antenna (see «XM ANTENNA REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). NO - Substitute a known-good XM antenna lead. If the XM receiver (AcuraLink control unit) receives a signal, replace the original XM antenna lead. If the XM receiver (AcuraLink control unit) does not receive a signal, substitute a known-good XM receiver (AcuraLink control unit).
Check XM antenna 2P connector and XM receiver connector B (2P). Are the connectors connected? YES - Go to step 13. NO - Reconnect XM antenna 2P connector and XM receiver connector B (2P), recheck XM radio operation. If the signal restored, operation is normal. If signal not restored go to step 6 .
Disconnect XM receiver connector A (14P).
Measure the voltage between XM receiver connector A (14P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 15. NO - Repair open in the wire between No. 5 (10 A) fuse in the under-dash fuse/relay box and XM receiver connector A (14P) No. 1 terminal.
Reconnect the XM receiver connector A (14P).
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver connector A (14P) No. 11 terminal and body ground. Is there less than 0.1 V? YES - Go to step 18. NO - Repair open in the wire between XM receiver connector A (14P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).
Substitute known-good XM antenna. Does the XM radio receiver a signal? YES - Replace XM antenna (see «XM ANTENNA REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). NO - Substitute a known-good XM antenna lead. If the XM receiver receives a signal, replace the original XM antenna lead. If the XM receiver does not receive a signal, substitute a known-good XM receiver unit.

XM radio display is blank and no station information is displayed (with AcuraLink)

Note. Always check the connectors for poor connections or loose terminals. If you replace the XM receiver, the Acuralink must be reactivated by Acura Client Services. Check the vehicle battery condition first.

Scheme 141

Scheme 141: XM radio display is blank and no station information is displayed (with AcuraLink)

Scheme 142

Scheme 143

Scheme 144

Scheme 145

Scheme 146

Scheme 147

Disconnect the XM receiver (AcuraLink control unit) connector A (20P).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 3. NO - Repair open in the between No. 5 (10 A) fuse in the under-dash fuse/relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal.
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 2 terminal and body ground. Is there battery voltage? YES - Go to step 5. NO - Repair open in the wire between No. 32 (10 A) fuse in the under-dash fuse/relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 2 terminal.
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 12 terminal and body ground. Is there battery voltage? YES - Go to step 6. NO - Repair open in the wire between No. 21 (10 A) fuse in the under-dash fuse/relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 12 terminal.
Reconnect the XM receiver (AcuraLink control unit) connector A (20P).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground. Is there less than 0.1 V? YES - Go to step 8. NO - Repair open in the wire between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).
Turn the ignition switch to LOCK (0).
Disconnect audio unit connector D (14P), XM receiver (AcuraLink control unit) connector A (20P), navigation unit connector A (20P), and navigation display unit 20P connector.
Check for continuity between the following terminals of the audio unit connector D (14P) and XM receiver (AcuraLink control unit) connector A (20P). CONNECTOR TERMINAL REFERENCE Audio unit connector XM receiver (AcuraLink control unit) connector Wire color D3 A18 BRN D9 A7 GRN D10 A17 RED Is there continuity? YES - Go to step 11. NO - Repair open in the wire(s) between audio unit and XM receiver (AcuraLink control unit).
Check for continuity between body ground and XM receiver (AcuraLink control unit) connector A (20P) terminals No. 7 and 17 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the audio unit and XM receiver (AcuraLink control unit) or between the shield wires (replace the applicable shield harness). NO - Go to step 12.
Check for continuity between the terminals of XM receiver (AcuraLink control unit) connector A (20P) according to the cable. CONNECTOR TERMINAL REFERENCE From terminal To terminals A18 A17, A7 A17 A7 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between the audio unit and XM receiver (AcuraLink control unit) (replace the appropriate shield harness). NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit. If the symptom is still present, substitute a known-good XM receiver (AcuraLink control unit) and recheck. If the symptom indicated goes away, update the AcuraLink control unit if it does not have the latest software, then recheck. If the software is the latest, replace the AcuraLink control unit (see «ACURALINK CONTROL UNIT (XM RECEIVER) REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__acuralink-control-unit-xm-receiver-removalinstallation) ).

XM radio display is blank and no station information is displayed (Without AcuraLink)

Note. Check the vehicle battery condition first. Check the connectors for poor connections or loose terminals.

Scheme 148

Scheme 148: XM radio display is blank and no station information is displayed (Without AcuraLink)

Scheme 149

Scheme 150

Scheme 151

Scheme 152

Scheme 153

Scheme 154

Turn the ignition switch to LOCK (0).
Disconnect XM receiver connector A (14P).
Measure the voltage between XM receiver connector A (14P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to Step 4. NO - Repair open in the wire between No. 5 (10 A) fuse in the under-dash fuse/relay box and XM receiver connector A (14P) No. 1 terminal.
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver connector A (14P) No. 11 terminal and body ground. Is there less than 0.1V? YES - Go to step 6. NO - Repair open in the wire between XM receiver connector A (14P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).
Turn the ignition switch to LOCK (0).
Reconnect XM receiver connector A (14P).
Measure the voltage between XM receiver connector A (14P) No. 2 terminal and body ground. Is there 10 volts or more present? YES - Go to step 9. NO - Substitute a known- good XM receiver and recheck. If 10 volts or more are present, replace the original XM receiver (see «XM RECEIVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver connector A (14P) No. 2 terminal and body ground. Is there less than 0.5V? YES - Go to step 11. NO - Substitute a known- good audio unit and recheck. If 0.5 volts or less are present, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Turn the ignition switch to LOCK (0).
Disconnect audio unit connector D(14P), XM receiver connector A (14P), navigation unit connector A (20P), and navigation display unit 20P connector.
Check for continuity between the following terminals of the audio unit connector D (14P) and XM receiver A (14P). CONNECTOR TERMINAL REFERENCE Audio unit connector XM Receiver connector Wire color D3 A3 BRN D9 A9 GRN D10 A10 RED Is there continuity? YES - Go to step 14. NO - Repair open in the wire(s) between audio unit and XM receiver.
Check for continuity between body ground and XM receiver connector A (14P) terminals No. 9 and 10 individually. Is there continuity? YES - Repair short to body ground in the wire(s) between the audio unit and XM receiver or a short between the shield wires (replace the applicable shielded harness). NO - Go to step 15.
Check for continuity between the terminals of XM receiver connector A (14P) according to the cable. CONNECTOR TERMINAL REFERENCE From terminal To terminals A3 A9, A10 A9 A10 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between the audio unit and XM receiver (replace the appropriate shield harness). NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good XM receiver and recheck. If the symptom/ indicated goes away, replace the original XM receiver (see «XM RECEIVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).

XM radio preset memory is lost (with AcuraLink)

Note. Check the connectors for poor connections or loose terminals. If you can only tune to channel 000,001,174, and 247, make sure the audio unit is set to channel mode (see owners manual), if it is set to channel mode, call XM Satellite Radio customer support and check the account activation status. If you replace the XM receiver, the AcuraLink must be reactivated by Acura Client Services. Check the vehicle battery condition first.

Scheme 155

Scheme 155: XM radio preset memory is lost (with AcuraLink)

Scheme 156

Scheme 157

Turn the ignition switch to ON (II).
Turn on the audio unit and set each of the XM radio channel preset buttons. Do each of the XM radio channel preset buttons set properly? YES - Go to step 3. NO - Go to step 7 .
Turn the ignition switch to LOCK (0) for 1 minute, then turn it back to ON (II).
Test all of the XM radio channel preset buttons for proper recall operation. Do the preset buttons recall the set radio stations? YES - System is normal at this time. Check connections at the audio unit. NO - Go to step 5.
Turn the ignition switch to LOCK (0).
Disconnect XM receiver (AcuraLink control unit) connector A (20P).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between the under-dash fuse/relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 1 terminal.
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 2, and No. 12 terminals and body ground individually. Is there battery voltage? YES - Go to step 10. NO - Repair open in the wire between the under-dash fuse-relay box and XM receiver (AcuraLink control unit) connector A (20P) No. 2 and No. 12 terminals.
Reconnect XM receiver (AcuraLink control unit) connector A (20P).
Measure the voltage between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground. Is there less than 0.1 V? YES - Update the AcuraLink control unit if it does not have the latest software, then recheck. If the software is the latest, replace the AcuraLink control unit (see «ACURALINK CONTROL UNIT (XM RECEIVER) REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__acuralink-control-unit-xm-receiver-removalinstallation) ). NO - Repair open in the wire between XM receiver (AcuraLink control unit) connector A (20P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).

XM radio preset memory is lost (without AcuraLink)

Scheme 158

Scheme 158: XM radio preset memory is lost (without AcuraLink)

Scheme 159

Scheme 160

Turn the ignition switch to ON (II).
Turn on the audio unit and set each of the XM radio channel preset buttons. Do each of the XM radio channel preset buttons set properly? YES - Go to step 3. NO - Go to step 7 .
Turn the ignition switch to LOCK (0) for 1 minute, then turn it back to ON (II).
Test all of the XM radio channel preset buttons for proper recall operation. Do the preset buttons recall the set radio stations? YES - System is normal at this time. Check connections at the audio unit. NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Disconnect XM receiver connector A (14P).
Measure the voltage between XM receiver connector A (14P) No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 8. NO - Repair open in the wire between the under-dash fuse/relay box and XM receiver connector A (14P) No. 1 terminal.
Turn the ignition switch to ON (II).
Measure the voltage between XM receiver connector A (14P) No. 2 terminal, and body ground individually. Is there battery voltage? YES - Go to step 10. NO - Repair open in the wire between the under-dash fuse-relay box and XM receiver connector A (14P) No. 2 terminal.
Reconnect XM receiver connector A (14P).
Measure the voltage between XM receiver connector A (14P) No. 11 terminal and body ground. Is there less than 0.1 V? YES - Replace the XM receiver (see «XM RECEIVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). NO - Repair open in the wire between XM receiver connector A (14P) No. 11 terminal and body ground (G606) (see «FLOOR WIRE HARNESS (RIGHT BRANCH)»(/acura/mdx/ii-2006-2010/remont/body-electrical/#connectors-and-harnesses__floor-wire-harness-right-branch) ).

Poor or no sound with XM radio (Audio unit does display XM channels)

Note. Check the XM radio reception in an open area. Poor reception/interference can be caused by nearby tall buildings, mountains, or high-voltage power lines. Check the connectors for poor connections or loose terminals. If you can only tune to channel 000, 001,174, and 247, make sure the audio unit is set to channel mode (see owners manual), if it is set to channel mode, call XM Satellite Radio customer support and check the account activation status. If you replace the XM receiver, the AcuraLink must be reactivated by Acura Client Services. Check the vehicle battery condition first.

Scheme 161

Scheme 161: Poor or no sound with XM radio (Audio unit does display XM channels)

Scheme 162

Scheme 163

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Scheme 166

Turn the ignition switch to ON (II).
Turn on the audio unit and select XM radio.
Check for an error message on the display. Are there any messages displayed? YES - Go to «ERROR CODE»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__error-codes) . NO - With AcuraLink: Go to step 4. Without AcuraLink: Go to step 9 .
Turn the ignition switch to LOCK (0).
Disconnect audio unit connector D (14P) and the XM receiver (AcuraLink control unit) connector A (20P).
Check for continuity between audio unit connector D (14P) and XM receiver (AcuraLink control unit) connector A (20P) according to the table. CONNECTOR TERMINAL REFERENCE Audio unit connector XM Receiver (AcuraLink control unit) connector Wire color D6 A9 BLK D14 A19 GRN D5 A10 RED D13 A20 WHT Is there continuity? YES - Go to step 7. NO - Repair open in the wire(s) between the audio unit and XM receiver (AcuraLink control unit) or replace the appropriate shielded harness.
Check for continuity to body ground between the terminals of XM receiver (AcuraLink control unit) connector A (20P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and the audio unit connector D (14P) No. 4 terminal (the harness shield). CONNECTOR TERMINAL REFERENCE XM Receiver (AcuraLink control unit) connector Wire color A9 BLK A10 RED A19 GRN A20 WHT Is there continuity? YES - Replace the shielded wires between the audio unit and XM receiver (AcuraLink control unit). NO - Go to step 8.
Check for continuity between the terminals of XM receiver (AcuraLink control unit) connector A (20P) according to the table. CONNECTOR TERMINAL REFERENCE From terminal To terminals A9 A10, A19, A20 A10 A19, A20 A19 A20 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between the audio unit and XM receiver (AcuraLink control unit). NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good XM receiver (AcuraLink control unit) and recheck. If the symptom/indication goes away, replace the original XM receiver (AcuraLink control unit) (see «XM RECEIVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).
Check for continuity between audio unit connector D (14P) and XM receiver connector A (14P) according to the table. CONNECTOR TERMINAL REFERENCE Audio unit connector XM receiver connector Wire color D6 A6 BLK D14 A14 GRN D5 A5 RED D13 A13 WHT Is there continuity? YES - Go to step 7 . NO - Repair open in the wire(s) between the audio unit and XM receiver.
Check for continuity between XM receiver connector A (14P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and the audio unit connector D(14P) No. 4 terminal (the harness shield). CONNECTOR TERMINAL REFERENCE XM receiver connector Wire color A5 RED A6 BLK A13 WHT A14 GRN Is there continuity? YES - Repair short to body ground in the wire(s) between the audio unit and XM receiver or a short between the shield wires (replace the applicable shielded harness). NO - Go to step 11.
Check for continuity between the terminals of XM receiver connector A (14P) according to the cable. CONNECTOR TERMINAL REFERENCE From terminal To terminals A5 A6, A13, A14 A6 A13, A14 A13 A14 Is there continuity between any of the terminals? YES - Repair short in the wire(s) between the audio unit and XM receiver. NO - Substitute a known-good audio unit and recheck. If the symptom/indicated goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good XM receiver and recheck. If the symptom/ indication goes away, replace the original XM receiver (see «XM RECEIVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ).

Audio remote switch does not work properly

Note. Check the connectors for poor connections or loose terminals. Check the vehicle battery condition first.

Scheme 167

Scheme 167: Audio remote switch does not work properly

Scheme 168

Test the audio remote switch (see «AUDIO REMOTE SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system) ). Is the audio remote switch OK? YES - Intermittent failure, the audio remote switch and audio unit are OK at this time. NO - Go to step 2.
Turn the ignition switch to ON (II).
Turn on the audio unit and check the audio unit operation (volume up, volume down, CH (-), CH (+), MODE). Is the audio unit operation OK? YES - Operation is normal. NO - Go to step 4.
Turn the ignition switch to LOCK (0).
Remove the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Disconnect the audio unit connector B (32P). NOTE: Eject all the CDs before disconnecting the audio unit and CD changer to prevent damaging the CD player's load mechanism.
Reconnect the audio remote switch. While moving the steering wheel about 3/4 turn left and right, measure the resistance between the audio unit connector B (32P) No. 3 and No. 19 terminals as specified in the table. AUDIO REMOTE SWITCH TABLE AUDIO REMOTE SWITCH CHART Button held down VOL DOWN VOL UP CH (-) CH (+) MODE (NONE) Resistance about 100 ohms about 357 ohms about 775 ohms about 1.7 kohms about 3.7 kohms about 10 kohms Is the resistance OK? YES - Go to step 8. NO - Repair open or high resistance in the circuit between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel (see «CABLE REEL REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/airbag/#srs-supplemental-restraint-system) ).
Check for continuity between body ground and the No. 3 and No. 19 terminals of audio unit connector B (32P) individually. Is there continuity? YES - Repair the short to body ground in the circuit between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel (see «CABLE REEL REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/airbag/#srs-supplemental-restraint-system) ). NO - Replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Audio unit button does not work

Note. To troubleshoot the main power switch, go to POWER SWITCH WILL NOT TURN ON (see ).

Refer to the following switch list, and find the appropriate switch for each button. Then do the following exercise to identify the switch that does not work by operating various buttons that only belong to that switch. Switch list Switch A: AM/FM, XM, 6DDISC, AUX, DISP, SCAN, RPT, ASEL/RDM, SEEK±, DVD, REAR PWR, FRONT SOURCE, REAR SOURCE, REAR CTRL, ELECT, ROAD, PWR, SOUND, 1-6 Switch B: INFO, MAP/GUIDE, MENU, CANCEL, SET UP, AUDIO, interface dial/ display
Check to see if the buttons that do not function all belong to switch A. Are they all switch A's? YES - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). NO - Go to Step 3.
Check to see if the buttons that do not function belong to switch B. Are they switch B's? YES - Faulty audio-HVAC display panel and audio unit. Replace the audio-HVAC display module. NO - Check the connections between the interface dial and audio panel, and recheck the function. If the symptom is still present, substitute a known-good audio unit and recheck. If the symptom/ indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Audio unit disc indicator does not work

Note. Discs with labels should not be used in the audio unit. They may damage the player mechanism.

Turn on the audio system.
Insert a known-good disc or press the EJECT button. Is the DISC indicator (LED) indicated? YES - The audio unit is OK at this time. Check for loose or poor connections at audio unit and audio panel. NO - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Security indicator does not work properly

Note. The system will not operate without the 4-digit : security (anti-theft) code. Before, troubleshooting, confirm that a 4-digit security (anti-theft) code is recorded.

Turn off the audio system. Is the security indicator (LED) light on (blink)? YES - Go to Step 2. NO - Substitute a known-good audio unit and. recheck. If the symptom/indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the, symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).
Turn on the audio system. Is the security indicator (LED) light out? YES - The audio unit is OK at this time. Check for loose or poor connections at audio unit and audio panel. NO - Substitute a known-good audio unit and recheck. If the symptom/indication goes away, replace the original audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the symptom is still present, substitute a known-good audio panel and recheck. If the symptom/ indication goes away, replace the original audio panel (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ).

Sound Quality Diagnosis

Special tools required

Diagnostics CD 07AAZ-SDBA100

Use the following tests to check sound quality.

Note. Before beginning the following tests, write down the client's bass, treble, fader and balance settings, then set them to their center positions for the testing.

Left/Right Channel ID

Do this test to confirm proper channel routing.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play track No. 1 (left, both, right channel ID) at a normal, or slightly higher than normal, volume level.
The voice should be audible only from the channel or channels when indicated. If the channel ID is correct for each side, go to «PHASE TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__phase-test) . If the channel ID is not correct, check for Shorted speaker wire Faulty amplifier Faulty audio unit

Special tools required

Diagnostics CD 07AAZ-SDBA100

Use the following tests to check sound quality.

Note. Before beginning the following tests, write down the client's bass, treble, fader and balance settings, then set them to their center positions for the testing.

Phase Test

Do this test to confirm proper speaker phasing.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play track No. 2 (phase) at a normal, or slightly higher than normal, volume level.
The voice should sound centered and focused when it is in-phase.
The voice should sound diffused, and have "less bass" when it is out of phase. If the voice changes from in-phase to out of phase as indicated by the prompt, the phasing is correct. Go to «ELECTRICAL NOISE TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__electrical-noise-test) . If the voice always sounds out of phase, phasing is not correct. Check for: Crossed speaker wires Faulty amplifier Faulty audio unit

Special tools required

Diagnostics CD 07AAZ-SDBA100

Electrical Noise Test

Do this test to check for electrical noise being induced into the audio system.

Note. Electrical noise may be caused by outside sources that cannot be handled by the audio system. Make sure you remove any cell phones and/or turn off any aftermarket devices before beginning this test.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play track No. 4 (digital zero) at a normal, or slightly higher than normal, volume level.
Operate any electrical device that may create electrical noise in the audio system, including starting the engine.
Play track No. 5 (near digital zero) at a normal, or slightly higher than normal, volume level.
Operate any electrical device that may create electrical noise in the audio system, including starting the engine.
Play track No. 6 (SNR) at a normal, or slightly higher than normal, volume level.
Operate any electrical device that may create electrical noise in the audio system, including starting the engine. If no abnormal noise is heard, go to the «INDIVIDUAL SPEAKER TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__individual-speaker-test) . If the noise is present only during the SNR track, replace the audio unit (see «AUDIO UNIT REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__audio-unit-removalinstallation) ). If the noise is heard during the digital zero or near digital zero track, check for Poor ground at the audio unit, amplifier, engine, or battery cable Pinched or shorted speaker or amplifier wire Faulty amplifier Faulty audio unit Other faulty components causing excessive electrical noise (ignition coils, alternator, door lock actuators, etc.). Disconnect any suspect components, and then replay the tracks that were originally noisy. If the noise is gone, check the component's circuit and the component.

Special tools required

Diagnostics CD 07AAZ-SDBA100

Individual Speaker Test

Do this test to identify a faulty speaker.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play track No. 30 (steady 300 Hz tone) at a normal, or slightly higher than normal, volume level.
Listen to each speaker for poor sound compared to the other channels. Use the audio unit's fader and balance settings to help isolate the channel with the problem. If the sound quality produced by a specific speaker is poor, substitute it with a known-good speaker. If the poor sound quality continues, go to the «SOUND BALANCE TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__sound-balance-test) . If the sound quality is OK, go to the «SOUND BALANCE TEST»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__sound-balance-test) .

Special tools required

Diagnostics CD 07AAZ-SDBA100

Sound Balance Test

Perform this test to identify a faulty channel or speaker.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Confirm the bass and treble are set to the center positions.
Play track No. 3 (pink noise) at a normal, or slightly higher than normal, volume level.
A "static" type sound should be heard through all speakers.
Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit of a known-good vehicle.
Set the bass and treble to the center positions.
Play track No. 3 (pink noise) all the same level as was played in step 3 .
Compare the sounds made by the two vehicles. If the sound does not have as much bass, check the subwoofer and circuit. If the sound does not have enough "hiss," check the tweeters and their circuits.

Special Tools Required

Diagnostics CD 07AAZ-SDBA100

Frequency Sweep

Do this test to find rattles or reverberations that may cause a perception of poor sound quality.

Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play track No. 13 (sweep from 500 Hz to 35 Hz) at a normal, or slightly higher than normal, volume level.
Listen to each speaker for poor sound quality or reverberations caused by specific frequencies. Use the voice-over to estimate the frequency that causes the vibration. Use the audio unit's fader and balance settings to help isolate the channel with the problem. If vibrations or poor sound quality are heard, go to step 4. If no vibrations or poor sound quality are heard, go to «SOUND JUDGING»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__sound-judging) .
Choose the appropriate track from No. 14 to 25 (small range frequency sweep) or 26 to 53 (single frequencies) to recreate the frequency that caused the poor sound quality or vibration witnessed in step 3 ; this aids in diagnosis of the cause. NOTE: When you get to the track that recreates the problem, select the repeat function on the audio unit, this will help you isolate the cause.
Replace or insulate the source of the vibration or, if the speaker is the source of the poor sound quality, replace it.

Special tools required

Diagnostics CD 07AAZ-SDBA100

Sound Judging

Do this test to compare overall sound quality, imaging, and dynamics between the client's vehicle and a known-good vehicle. Only use a vehicle of the same model and trim level for this test.

In the client's vehicle, set the bass, treble, fader, and balance settings to the client's normal settings that were written down before beginning the test.
Insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play tracks No. 7 to 12 (sound quality, midland, dynamics, and imaging demonstration tracks) at a normal, or slightly higher than normal, volume level. Write down the volume setting being used.
Listen to areas of the track that stand out as being either very clear or poorer than other areas of the track.
In a known-good vehicle, insert the audio diagnostic CD (T/N 07AAZ-SDBA100) into the audio unit.
Play the tracks at the same volume level and the same bass, treble, balance, and fader settings as used in step 3 in the client's vehicle.
Listen to the same area of the track that stood out as being either very clear or poorer than other areas of the track.
Compare the client's vehicle's sound quality results the known-good vehicle's results. If the sound quality in the client's vehicle is comparable to the sound quality in the known-good vehicle, then the client's vehicle is operating as designed. If the sound quality is not comparable, check these items in order. Loose or improperly installed speakers or other hardware that may create interference from the vibrations generated by the speakers Poor power or ground to the stereo amplifier Damaged speaker(s) Faulty amplifier Faulty audio unit

Seek Stop Test

Do this test to check the performance of the audio unit's AM and FM reception. Refer to symptom troubleshooting: audio sound weak or distorted, or no sound is heard from speakers (display is normal) (see NO SOUND IS HEARD FROM SPEAKER(S) (DISPLAY IS NORMAL) (WITH NAVIGATION) ) before continuing with this test.

Note. Window tint, aftermarket theft-recovery devices and other aftermarket devices may affect reception. Changes in cloud cover and other atmospheric conditions will affect the ability of the audio unit to receive radio signals.

Park the client's vehicle in an open area away from buildings or other obstructions.
Park a known-good vehicle (same year, model, and trim level) next to the client's vehicle, facing the same direction.
Start the engine in the client's vehicle, and turn on the radio.
Set the FM receiver to 87.7 MHz.
Press the "Seek +" button, and record the first station that the audio unit locks onto.
Press the "Seek +" button repeatedly, and write down each station that the audio unit locks onto until the station recorded in step 5 is reached again.
Set the AM receiver to 530 kHz.
Press the "Seek +" button, and record the first station that the audio unit locks onto.
Press the "Seek +" button repeatedly, and write down each station that the audio unit locks onto until the station recorded in step 8 is reached again.
Turn the ignition switch to LOCK (0).
Start the engine in the known-good vehicle, and then perform steps 4 thru 10 on the known-good vehicle.
Compare the number of stations received in steps 6 and 9 in the client's vehicle with the number of stations received in the known-good vehicle. If the number of stations received is the same, or within 10 %, the audio unit's tuner performance is OK. The problem may be atmospheric conditions, multi-path interference, or other obstructions to the radio signal. If the client's vehicle receives fewer stations by at least 10 %, go to step 2 of poor radio reception or interference (see «POOR AM OR FM RADIO RECEPTION OR INTERFERENCE»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#audio-system__poor-am-or-fm-radio-reception) ).

Audio Unit Removal/Installation

SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and the precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or service.

Note. Put on gloves to protect your hands. Take care not to scratch the dashboard and related parts. Lay a workshop towel under the parts when working on them to protect the face panel from scratches or other damage. Eject all the disc before remove the audio unit to prevent damaging the CD/DVD player's load mechanism. If you are replacing the audio unit, write down the audio presets (if possible), and enter them into the new audio unit.

Scheme 169

Scheme 169: Audio Unit Removal/Installation

Scheme 170

Make sure you have the anti-theft codes for the audio system and the navigation system (if equipped).
Remove the driver's inner dashboard trim (see «DRIVER'S INNER DASHBOARD TRIM REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ), and front passenger's dashboard trim (see «PASSENGER'S DASHBOARD TRIM REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ).
Remove the console lower trim panel (A) and the self tapping screws, then pull out the audio unit (B).
Disconnect the connectors (C), then remove the audio unit.
Remove the climate control unit (see «DUST AND POLLEN FILTER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/automatic-hvac-system/#climate-control-system) ).
Remove the screws and the audio unit (A) from the audio panel (B).
Install the audio unit in the reverse order of removal, and note these items
Give the new anti-theft codes to the client. Make sure all the connectors and the antenna lead are secure. Enter anti-theft codes for the audio system and the navigation system (if equipped). Set the clock (on vehicles without navigation). If necessary, enter the navigation system code.

Scheme 171

Scheme 171: Door Speaker

Remove the door panel. Front: (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ) Rear: (see «REAR DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__rear-door-panel-removalinstallation) )
Remove the three mounting screws from the speaker (A).
Disconnect the 2P connector (B), and remove the speaker.
Measure the resistance between the No. 1 and No. 2 terminals. There should be about 2 ohms.
If the resistance is not as specified, replace the door speaker.

Center Speaker

Note. Put on gloves to protect your hands. Take care not scratch the dashboard.

Scheme 172

Scheme 172: Center Speaker

Remove the center upper panel (see «DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ).
Remove the screws and the speaker (A).
Measure the resistance between No. 1 and No. 2 terminals there should be about 4 ohms.
If the resistance is not as specified, replace the front center speaker.

Scheme 173

Scheme 173: Tweeter

Scheme 174

Scheme 175

Carefully pry the tweeter grille (A) out of the dashboard. Be careful not to damage the tweeter grille and the dashboard.
Disconnect the 2P connector (B) from the tweeter.
Remove the tweeter speaker from the speaker grille.
Check the capacitor (A) condition. If any problem is found, replace the tweeter.
Measure the resistance between the tweeter (A) No. 2 terminal and the outside terminal of the capacitor. There should be about 6 ohms.
If the resistance is not as specified, replace the tweeter.

Scheme 176

Scheme 176: Satellite Speaker

Remove the quarter pillar trim (see «QUARTER PILLAR TRIM»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__quarter-pillar-trim) ).
Remove the speaker grille (A) and connector clip (B).
Remove the screws and the satellite speaker (C).
Measure the resistance between the No. 1 and No. 2 terminals. There should be about 4 0.
If the resistance is not as specified, replace the satellite speaker.

Scheme 177

Scheme 177: Subwoofer/amplifier unit (With navigation)

Remove the right rear side trim panel (see «TRIM REMOVAL/INSTALLATION - REAR SIDE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-area) ).
Disconnect the 8P connector (A), then remove the bolts, nuts and pull out the subwoofer (B).

Input Test

With the connector still disconnected, make the input tests at the connector according to the table. TERMINAL TEST CHARTS Terminal Test 5 Measure the voltage to ground with all conditions: There should be battery voltage. 6 Measure the voltage to ground with audio power switch ON: There should be battery voltage.
Reconnect the connector to the subwoofer/ amplifier unit, and make the input test at the connector according to the table. TERMINAL TEST CHART Terminal Test 4 Measure the voltage to ground with all conditions: There should be less than 0.1 V.
If the input test proves OK and the subwoofer has no sound, replace the faulty subwoofer/amplifier unit.

Scheme 178

Scheme 178: Subwoofer (Without navigation)

Remove the right rear side trim panel (see «TRIM REMOVAL/INSTALLATION - REAR SIDE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-area) ).
Disconnect the 8P connector (A), then remove the bolts, nuts and pull out the subwoofer (B).
Measure the resistance between the No. 2 and No. 7 terminals and No. 3 and No. 8. There should be about 2 ohms.
If the resistance is not as specified, replace the subwoofer.

Scheme 179

Scheme 179: Stereo Amplifier Removal/ Installation

Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ) and passenger's dashboard undercover (see «PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ).
Disconnect the connectors (A).
Loosen the bolts, then pull out the stereo amplifier (B).
Install the stereo amplifier in the reverse order of removal.

AcuraLink Control Unit (XM Receiver) Removal/Installation

With AcuraLink

Note. The AcuraLink must be reactivated by Acura Client Services when: The AcuraLink control unit (XM receiver) is replaced. DATA RESET was selected while in the self-diagnostic function. Vehicle ownership changes.

Scheme 180

Scheme 180: AcuraLink Control Unit (XM Receiver) Removal/Installation

Remove the right rear side trim panel (see «TRIM REMOVAL/INSTALLATION - REAR SIDE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-area) ).
Disconnect the connectors (A), then remove the bolts and pull out the AcuraLink control unit (XM receiver) (B).
Install the AcuraLink control unit (XM receiver) in the reverse order of removal. NOTE: If you replaced the AcuraLink control unit, make sure it has the latest software (see «UPDATING THE ACURALINK CONTROL UNIT»(/acura/mdx/ii-2006-2010/remont/entertainment-systems/#acuralink) ).

Scheme 181

Scheme 181: XM Receiver Removal/Installation

Remove the right rear side trim panel (see «TRIM REMOVAL/INSTALLATION - REAR SIDE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-area) ).
Disconnect the connectors (A), then remove the bolts and pull out the XM receiver (B).
Install the XM receiver in the reverse order of removal.

Scheme 182

Scheme 182: Audio Remote Switch Test

Scheme 183

Remove the driver's airbag assembly (see «DRIVER'S AIRBAG REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/airbag/#srs-supplemental-restraint-system) ).
Remove the 20P connector from the cable reel.
Measure the resistance between the No. 19 and No. 20 terminals in each switch position according to the table. RESISTANCE CHART Position Resistance Switch not pressed About 10 kohms MODE About 3.7 kohms CH (+) About 1.7 kohms CH (-) About 775 ohms ↑ (VOL. UP) About 357 ohms ↓ (VOL. DOWN) About 100 ohms
If the resistance is not as specified, replace the audio remote switch (see «STEERING WHEEL DISASSEMBLY/REASSEMBLY»(/acura/mdx/ii-2006-2010/remont/manual-power-steering/#power-steering-system) ).
Use a diode tester between the terminals in each switch position according to (Scheme 183).
If the diode test is not as specified, replace the audio remote switch (see «STEERING WHEEL DISASSEMBLY/REASSEMBLY»(/acura/mdx/ii-2006-2010/remont/manual-power-steering/#power-steering-system) ).

Scheme 184

Scheme 184: AM/FM Antenna Amplifier Replacement

Remove the headliner (see «HEADLINER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__headliner-removalinstallation) ).
Disconnect the connector (A) from the AM/FM antenna amplifier (B).
Remove the bolt and AM/FM antenna amplifier.
Install the unit in the reverse order of removal.

Scheme 185

Scheme 185: XM Antenna Replacement

Remove the headliner (see «HEADLINER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__headliner-removalinstallation) ).
Remove the nut (A) from the XM antenna (B).
Disconnect the connector (C) and remove the XM antenna.
Install the XM antenna in the reverse order of removal.

Scheme 186

Scheme 186: Without Rear Entertainment

Open the center console.
Carefully pull out the auxiliary jack assembly (A), then disconnect the 5P connector (B).
Install in the reverse order of removal.

Audio System Acura MDX II

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Symptom Troubleshooting Index

Overview

Speed-sensitive volume compensation (SVC)

Scheme 63

Audio Unit Connector for Inputs and Outputs

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Stereo Amplifier Connector for Inputs and Outputs

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AcuraLink Control Unit (XM Receiver) Connector for Inputs and Outputs (With AcuraLink)

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XM Receiver Connector for Inputs and Outputs (Without AcuraLink)

Scheme 84

Interface Dial Connector for Inputs and Outputs

Scheme 85

Auxiliary Jack Assembly Connector for Inputs and Outputs (Without rear entertainment)

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Self-diagnostic Function

Scheme 91

How to Obtain the Audio Unit Serial Number

Scheme 92

Display Specifications

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Error Codes

Poor AM or FM radio reception or interference

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Power switch will not turn ON (No information display and no sound)

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Audio unit power will not turn OFF

Scheme 106

No sound is heard from speaker(s) (display is normal) (with navigation)

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No sound is heard from speaker(s) (display is normal) (without navigation)