Table 1:	Radio Features
Table 2:	Cassette Features
Table 3:	Compact Disc Features
Table 4:	XM Advisory Messages

The Entertainment System on this vehicle is configured with a radio, antenna, and speakers.

The following list shows the radios available for this vehicle:

Radio Features

Controls	Functions
All Radios, except UM8
Power	Push PWR/PUSH/VOL knob to turn the radio ON.
Volume	The volume is adjusted by rotating the PWR/PUSH/VOL knob.
Automatic Volume Control	Press the AUTOVOL button.
Tune	Turn the TUNE/SELECT/PUSH RCL knob.
Seek	Momentarily press the SEEK/SCAN button.
Scan	Hold the SEEK/SCAN button at least 4 seconds.
Presets	Six AM, Six FM1 and Six FM2
Preset Saving	Press and hold desired button until an audible beep is heard.
Set Clock	Press and hold the HR or MN button until an audible beep indicates the time set mode has been entered. Once the beep is heard, the time can be set by tapping each button to incrementally adjust the time. Holding down each button will rapidly change the time.
Recall	Push the TUNE/SELECT/PUSH RCL knob.
Fade or Balance	Press the BAL/FADE button to select and adjust w/SELECT knob.
Bass, Treble or Midrange	Press the TONE button to select and adjust w/SELECT knob.
Automatic Tone	Press AUTO TONE button.
Navigation Display Head, UM8
Power	Push PWR/VOL knob to turn the radio on.
NAV	Displays the map guidance screen.
NAV RPT	Repeats the last voice guidance message.
SETUP	Displays the setup function for the Navigation Radio.
Scroll/Select knob	Push to display menu/Move up/down and left/right to highlight selection/Push to select.
Soft Key Buttons	Push to select the options listed on the navigation screen.

Cassette Features

Controls	UB1 Radio
Eject	EJECT button
Fast Forward	Preset button 1
Reverse	Preset button 4
Auto Reverse	Yes
Side	Preset button 5
Previous	Preset button 1
Next	Preset button 2
Dolby	Preset button 6
Repeat	NA

Compact Disc Features

Controls	UB1 Radio	UB0 Radio	UC6 Radio
Eject	EJECT button
Fast Forward	Preset button 1
Reverse	Preset button 4
Disc	Preset button 5
Previous	Preset button 1
Next	Preset button 2
Dolby	Preset button 6
Repeat	NA
Random	Preset button 6

Each item in the list below represents topics covered in detail below.

AM/FM Reception

Radio Signal

The radio signal is sent from a broadcast station and is then received by an antenna. The strength of the signal received depends on the following:

AM Reception

The AM band has a lower frequency range than the FM band. These longer wavelengths:

The AM frequencies have longer range due to the ground wave. The ground wave follows the curvature of the earth and is effected by its conductivity. Greater conductivity equates to less signal loss thus transmission over water is better than over land. The AM band has a range of 80-320 km (50-200 mi).

FM Reception

The shorter wavelengths of the higher frequency FM band:

Broadcasts in the FM band are limited to "line of sight" reception which is typically 40 km (25 mi). Even when out of a direct line of sight, the signal may be reflected into areas that would be in a "shadow" otherwise. Factors which affect the line of sight include:

XM Satellite Radio

XM satellite radio provides digital radio reception. The XM signal is broadcast from two satellites and, where necessary, terrestrial repeaters. The high power satellites allow the antenna to receive the XM signal even when foliage and other partial obstructions block the antennas view of the satellite. Terrestrial repeaters are used in dense urban ares. These repeaters will receive the satellite signal and re-broadcast them at much higher power levels in order to ensure reception in areas with densely packed tall buildings.

Theft Deterrent

The theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place the radio will not respond to any button presses and become inoperative. The two scenarios able to cause this condition are:

The only way to unlock the radio is by using a scan tool.

The digital radio receiver utilizes class 2 serial data to determine if it is in the appropriate vehicle. Each time the digital radio receiver receives the "run" power mode message, it compares the VIN information received from the body control module (BCM) on the class 2 serial data circuit. If a mis-match occurs, the radio display will indicate to the user the digital radio receiver is locked. The digital radio receiver cannot be unlocked, it must be replaced. The two scenarios able to cause this condition are:

Integral Multi Disc CD Changer (IMDX)

The integral multi disc CD changer has the capability of storing and playing up to six (6) compact discs. The integral multi disc CD changer has a shock-absorbing system. Only under extreme operating temperatures or severe shock or vibration should the compact disc player skip or mute. If the customer travels an abnormally rough road, a skip condition may be normal. Test drive the vehicle on a normal road with a known good CD. If the condition is still present, replace the radio.

The use of CD lens cleaner discs is not advised, due to the risk of contaminating the lens of the CD optics with lubricants internal to the CD mechanism.

Single Disc Loading

To operate the integral multi disc CD changer in the single play mode, press the "LOAD" button for less than two seconds. The LED to the right of the disc door will turn green to indicate the CD can be loaded. Insert the disc into the slot, label side up. The player will pull the disc in.

Multi Disc Loading

To operate the changer in the multi disc mode, press the "LOAD" button for more than two seconds and the LED to the right of the disc door will flash. Once the light stops flashing and turns green you can load a disc. Insert the disc into the slot, label side up. The player will pull the disc in. Once the disc is loaded, the light will begin flashing again. Once the light stops flashing and turns green you can load another disc.

Removing CDs

Use the eject button to remove a disc or discs. Perform the following to eject:

Amplifier

The amplifier in early build vehicles is a class 2 device that communicates with the scan tool on the Class 2 bus. The Class 2 amplifier will set a U100 in the radio if there is a communication problem. The late build vehicles have a NON-Class 2 amplifier that does not communicate over the Class 2 bus and therefore the NON-Class 2 amplifier will not set codes. Both amplifiers have similar operating characteristics, therefore, there are not separate diagnostics for the NON-Class 2 amplifier.

Automatic Volume Control

With automatic volume, the audio system adjusts automatically to make up for road and wind noise by increasing the volume as vehicle speed increases. On first design Bose amplifiers (class 2) the system uses a noise compensation microphone to monitor cabin noise and increase volume as needed, press the AUTO VOL button until AVOL ON appears on the display, to turn off press AUTO VOL button until AVOL OFF is displayed. On second design Bose amplifiers (non-class 2) and base radios the radio uses a vehicle speed signal, received via class 2 message to adjust volume based on speed, press the AUTO VOL button to select LOW, MEDIUM, or HIGH. To turn AUTO VOL off, press until AVOL OFF is displayed.

Radio Data System (RDS)

All uplevel audio systems are equipped with technology known as the radio data system (RDS). RDS is a system that sends data along with the audio of the FM station you are currently tuned to. RDS is a standard that defines how a FM broadcast station may send digital data along with the audio program. Think of it as a one way wireless modem, allowing the broadcaster to send information about his program to your receiver.

RDS data is carried in what is known as a "sub-carrier". A sub-carrier is a frequency that the FM broadcaster is authorized to use to send data or other audio programs that are not audible in the main audio program. RDS information can be used to display program information and to control the radio.

To receive the RDS signal, all that is needed is an FM receiver with a RDS circuit. A special integrated circuit capable of dealing with the RDS signal is in the RDS circuit and passes it along to the receiver's microprocessor where it is decoded and acted upon.

RDS Basic Information

RDS basic information:

In some cases, a radio station broadcasting incorrect information may cause the RDS features of the radio to appear to work improperly.

Broadcast RDS information can be used in a variety of ways by the receiver and listener, but basically falls into two categories: Display and Control.

Displaying Program Information

RDS displays textual information such as:

RDS is always on. When tuned to a non-RDS station, your radio will display frequency information as you would normally expect. When tuned to a RDS station, your radio will change from displaying the frequency of the FM station to displaying the call letters of the station or display the nickname of the station. This feature is known as the Program Service Name.

Controlling the Radio

RDS can control the radio when data the receiver can use responds to timely information performing the following:

Viewing and Selecting RDS Information for Display

Press the TUNE knob once for less then 2 seconds when the radio displays the program service name and the frequency of the station will be displayed. Press the knob again, and the program type (PTY) will be displayed. Pressed again, and the program name will be displayed (if the broadcaster is broadcasting one). The program name is an eight-character name that the broadcaster may use to further identify the type of programming currently being broadcast.

Using the RDS Traffic Feature

Some RDS broadcasters may carry traffic information programming to inform you of current traffic conditions in your listening area and is indicated by the icon in the radio display. RDS enables the broadcaster to get this information to you even when you are listening to a tape or compact disc. This feature can be enabled or disabled by the listener. Press the "TRAF" button to find a station that claims to carry traffic information. You may do this even when playing a cassette tape or compact disc. This action will operate in the background without interrupting the current playback. If the radio is not currently tuned to an RDS traffic station, the radio will immediately SEEK an RDS traffic station. If the radio finds an RDS traffic station, the" TRAF" icon will appear in the radio display as will brackets around the (TRAF) icon. If the radio cannot find an RDS traffic station after searching through the entire FM band, the radio will display "NO TRAFFIC".

Alternate Frequency (AF) Switching

RDS permits broadcaster's to send information to the radio that allows the radio to automatically switch frequency to the best quality station in that broadcaster's network.

Since the radio is displaying the broadcaster call letters or nickname, the listener will not see the frequency during an AF switch unless you have changed the default display to be frequency instead of Program Service name.

To enable or disable AF switching perform the following:

When AF is enabled and you recall a RDS station stored on preset, the radio determines if the station stored is of acceptable quality. If not, the radio checks all available AF's for your station. If the radio fails to locate your program, AF SEARCH will be displayed as the radio scans across the band looking for your program or an affiliated network. If the radio cannot find the original station or an acceptable alternate frequency NOT FOUND will be displayed and the radio returns to the original frequency for the preset.

RDS Clock Time

Broadcasters can choose to send clock time information in the RDS data. This information can be used to update the clock time on the radio. RDS clock time is broadcasted once a minute. To set the clock using RDS clock data perform the following:

Radio Error Messages

The radio displays the following error messages:

CHECK CD: Displays when the player encounters a focus or tracking error.

CHK CDXX: Displays when the CD changer encounters a focus or tracking error, If equipped.

CHK TAPE: Displays if a tape has been inserted but is unable to be played due to an error.

NO DISC: Displays when the radio expected a disc to be inserted.

NONE: Displays when the radio is unable to detect the vehicle speed data information via the class 2 serial data circuit.

Voice Recorder

To record a message, press the button with the circle on it and begin speaking. Press the button with the circle on it again to stop recording. System allows you to record up to 4 minutes of messaging.

You may also press and hold the button with the circle on it while you are speaking and then let it go when you are finished.

To play back messages, press the button with the right arrow on it. Pressing the right arrow button more than once will return you to previously recorded messages. If you press and hold this button for more than 1 second, all of the recorded messages will be played back.

To delete messages, press the button with the square on it while the message is playing. If you press and hold the right arrow button and the circle button at the same time for a half of a second, all of the messages will be deleted.

Rear Seat Audio (RSA)

The rear seat audio (RSA) and rear HVAC control functions are combined into one dual function control unit. The rear seat audio (RSA) control allows the rear seat passengers to listen to a different music source than the front seat passengers. The rear seat passengers can only control the music sources that the front seat passengers are not listening to. For example, the rear seat passengers may listen to the cassette or CD through headphones while the driver listens to the radio through the front speakers. The rear seat passengers have control of the volume for each headphone. The primary radio controls always override the RSA controls.

Power (PWR)

Press the PWR button in order to turn the rear seat audio system ON or OFF. The rear speakers mute when the power is turned ON unless you have a Bose equipped vehicle. The rear seat audio functions are operable even when the primary radio power is OFF.

Volume (VOL)

Rotate the volume knob in order to increase or decrease the volume. The left volume knob controls the left headphone and the right volume knob controls the right headphone.

Source Switching

Press the PROG or SRCE button in order to switch between playing a cassette or a CD and listening to the radio. There must be a cassette tape and/or compact disc in the player.

Seek (SEEK)

Press the SEEK button in order to seek to the next station. The display will show your selection.

Preset Scan

Press and hold the SEEK button in order to scan station presets.

Next

While listening to a CD or cassette, press the SEEK button in order to hear the next track.

XM Satellite Radio

XM is a national satellite radio service that offers up to 100 coast to coast channels including music, news, sports, talk and children's programming. XM provides digital quality audio and text information, including song title and artist name. A service fee is required in order to receive the XM service. For more information, contact XM at www.xmradio.com or call 1-800-852-9696.

Digital Radio Receiver

The radio controls communicate with the digital radio receiver via the class 2 communication circuit. The digital radio receiver sends low level audio signals to the radio.

Viewing Messages

Press the TUNE/SELECT/RCL knob while in XM mode to view various pieces of information related to the current song or channel. By pressing TUNE/SELECT/RCL knob, you may view four different categories of information: Artist Name/Feature, Song/Program Title, Channel Category, and other Additional Information that may be broadcast on that channel. Additional Information messages may not always be available. Each of the four information types may have multiple pages of text. To reach a category, press TUNE/SELECT/RCL knob consecutively until the desired type is displayed. If there are multiple pages of text for the selected information type, the radio will automatically display all the pages for that type at a rate of approximately one page every three seconds before timing out and returning to the default display. You may override this feature by pressing the TUNE/SELECT/RCL knob to review all of the pages at your own pace.

Selecting a Program Type

The TUNE/SELECT/RCL knob can be used to scroll through the list of available program types (PROG TYPE). Press the PROG TYPE button, then turn the TUNE/SELECT/RCL knob to scroll through the available program types. When the desired program type is shown on the display, press the SCAN button. The radio will seek the next station of that type.

XM Advisory Messages

Radio Display Message	Condition
XM Updating	Updating encryption code
No XM Signal	Loss of signal
Loading XM	Acquiring channel audio (after 4 second delay)
Channel Off Air	Channel not in service
Channel Unavail	Channel no longer available
No Artist Info	Artist Name/Feature not available
No Title Info	Song/Program Title not available
No CAT Info	Category name not available
Not Found	No channel available for the chosen category
No Information	No text/informational message available
XM Theftlocked	Theft Lock active
XM Radio ID	Electronic serial number (ESN) channel 0
Unknown	Radio ID not known (should only be if hardware failure
Check XM Receiver	Hardware failure