Radio/Audio System Description and Operation w/o CTF

The Radio/Audio System consists of 1 of 2 levels of audio entertainment:

Both levels of audio entertainment contain a speaker system that is appropriate for each radio/audio level and a choice of radios that contain various options.

Radio/Audio System Content

Base Level Audio System
UM7 Radio with AM/FM Stereo	UM6 Radio with AM/FM Stereo and Auto-Reverse Cassette
Fixed Mast Antenna	Fixed Mast Antenna

Uplevel Audio System
UL0/UP0 Radio with AM/FM Stereo and Auto-Reverse Cassette. UP0 includes a single CD Remote Playback Device	UN0 Radio with AM/FM Stereo and CD Player	U1F (Available on Oldsmobile Only) Radio with AM/FM Stereo and Auto-Reverse Cassette With CD Remote Playback Device
Fixed Mast Antenna	Fixed Mast Antenna	Fixed Mast Antenna
Optional Multiple CD Remote Playback Device	Optional Multiple CD Remote Playback Device	Optional Multiple CD Remote Playback Device
Optional BOSE audio amplifier	Optional BOSE audio amplifier	BOSE audio amplifier
Optional Rear Seat Audio Controller	Optional Rear Seat Audio Controller	--
Optional Steering Wheel Controls	Optional Steering Wheel Controls	Steering Wheel Controls

Playing the Radio - Base Level

VOLUME-BAL

RECALL

Finding a Station (Base Level)

AM-FM

Press the tune knob in order to change the radio band between AM and FM. The display will indicate the current band and the last radio frequency that was selected on that band.

TUNE

SEEK

SCAN

1. Press both SEEK buttons in order to activate the SCAN mode.
2. SCAN will appear on the display and the radio will stop at every station for a few seconds.
3. Press the right arrow button in order to tune into the next higher station
4. Press the left arrow button in order to tune into the next lower station.
5. Press VOLUME or both SEEK buttons to stop scanning.

PUSH BUTTONS

Up to 14 stations can be preset into the radio's memory using the numbered push buttons (1,3,5, and  7). In order to preset 4 AM and 4 FM stations, perform the following steps:

1. Tune to the desired radio station.
2. Press the SET push button. SET will appear on the display.
3. Press and hold a numbered push button until the SET display goes off. The radio will tune to the preset station the next time the same push button is pressed.

In order to preset 3 additional AM and 3 additional FM stations perform the following steps:

1. Tune to the desired radio station.
2. Press the SET push button. SET will appear on the display.
3. Press and hold two adjacent push buttons (1 and  3) until the SET display goes off. The radio will tune to the preset station the next time both push buttons are pressed.
4. Repeat the first 2 steps for each remaining pair of push buttons (3 and 5, or 5 and 7).

Setting the Tone - Base Level

BASS

TREB

Adjusting the Speakers - Base Level

BAL

FADE

Playing a Cassette Tape - Base Level

1. In order to play a tape, the ignition switch must be in the ACCESSORY or RUN position and the receiver must be turned ON.

Tapes are end-loaded into the cassette player.

2. Insert the tape squarely through the door, exposed tape side of the cassette facing to the right.
3. When the tape is fully inserted, the AM/FM portion of the radio will turn off and the tape will begin playing.
4. The tape player works best with tapes that are 30-45 minutes long on each side.

Longer running tapes may not work well in these players because they are usually too thin.

5. Once the tape is playing, the volume, balance and fade knobs operate the same as with the radio.

An arrow indicates which side of the tape is being played.

FWD

1. Press the SEEK right arrow key in order to fast forward the tape.
2. Press the SEEK left arrow key in order to stop the fast forward operation.

REV

1. Press the SEEK left arrow key in order to rewind the tape.
2. Press the SEEK right arrow key in order to stop rewinding the tape.

RECALL

Press the volume control knob to change from one side of the tape to the other.

EJECT

Press the EJECT push button in order to remove the tape or in order to stop the tape and switch to the radio.

CLN

1. If CLN appears on the display, the cassette player needs to be cleaned in order to prevent damage to the tape player.
2. After cleaning the tape player, press and hold the EJECT button for 5 seconds in order to reset the CLN indicator.
3. The radio displays "- - -" in order to show that the indicator has been reset.

Playing the Radio - Uplevel

PWR-VOL

RECALL

Speed Compensated Volume (SCV)

Finding a Station - Uplevel

AM-FM

TUNE

1. Press lightly on the TUNE control in order to release the tune control from the tune control's recessed position.
2. Rotate the TUNE knob to the right in order to increase the frequency.
3. Rotate the TUNE knob to the left in order to decrease the frequency.
4. Push the TUNE control back in order to store the frequency setting while not tuning.

SEEK

SCAN

1. Press and hold SEEK for 2 seconds. SCAN will appear on the display.
2. Use SCAN in order to listen to each radio station for a few seconds.
3. Press SEEK again in order to stop scanning.

PUSH BUTTONS

Up to 18 stations (6 AM, 6 FM1, and 6 FM2) can be preset into the radio's memory using the 6 numbered push buttons. In order to preset a station in memory, perform the following steps:

1. Press AM-FM in order to select the band.
2. Tune to the desired station, using the TUNE knob or SEEK.
3. Press AUTO TONE in order to select the setting that you prefer.
4. Press and hold 1 of the 6 push buttons until audio returns, approximately 2 seconds.
5. Whenever you press that push button, the preset station will return.

The AUTO TONE that you selected will also be automatically selected for that push button.

PSCAN

Any stations already stored in preset memory can be sampled by the PSCAN mode.

1. In order to use PSCAN, press the PSCAN push button.

PSCAN will scan each of the presets and stop for a few seconds.

2. Press PSCAN or another push-button in order to stop scanning to listen to a specific station.

PSCAN appears in the display whenever the tuner is in the PSCAN mode.

If 1 of the stations stored on a push-button is weak, the radio display shows the channel number (P1-P6) for several seconds before advancing to the next preset station.

Setting the Tone - Uplevel

AUTO TONE

The automatic tone control (ATC) feature tailors the equalization to the type of broadcast being received.

1. Press AUTO TONE in order to step through the 6 preset equalization settings of CLASSIC, NEWS, ROCK, POP, JAZZ, or C/W (Country Western).

Note the graph and words in the display for each press of the push button.

2. One or more presses of the AUTO TONE push-button brings up manual (MAN) and return the control of tone back to the TREB and BASS controls.
3. Any time that a BASS or TREBLE control rotates, the tone automatically sets to MAN.

BASS

1. Depress the BASS control in order to remove the control from the recessed position.
2. Rotate the BASS control to the right in order to increase the bass response.
3. Rotate the BASS control to the left in order to decrease the bass response.
4. Operation of this control will switch the radio's AUTO TONE feature to MAN.
5. Push the control knob back in to store when not in use.

TREBLE

1. Depress the TREB control in order to remove the control from the recessed position.
2. Pull the TREB control out to a fully extended position in order to make TREB adjustments.
3. Rotate the TREB control to the right in order to increase the treble response.
4. Rotate the TREB control to the left in order to decrease the treble response.
5. Operation of this control will switch the radio's AUTO TONE feature to MAN.
6. Push the control knob back in to store when not in use.

Adjusting the Speakers - Uplevel

BALANCE

1. Depress the BAL control in order to remove the control from the recessed position.
2. Rotate the balance to the right in order to adjust the sound to the right speakers.
3. Rotate the balance to the left in order to adjust the sound to the left speakers.
4. Push the control knob back in to store when not in use.

FADE

1. Depress the FADE control in order to remove the control from the recessed position.
2. Rotate the FADE control knob to the right in order to adjust the sound to the front speakers.
3. Rotate the FADE control knob to the left in order to adjust the sound to the rear speakers.
4. Push the control knob back in order to store when not in use.

Playing a Cassette Tape - Uplevel

1. Tapes may be played with the ignition ON or OFF.

If the ignition is ON but the radio is OFF, the tape will begin playing.

A tape symbol, accompanied by tape direction arrows, is shown in the center of the graphic display whenever a tape is playing.

2. Tapes are end-loaded into these players. Insert the tape squarely through the door, exposed tape side of the cassette facing the right.
3. When the tape is fully inserted, the AM/FM portion of the radio will turn OFF and the tape will begin playing.
4. The tape player works best with tapes that are 30 to 45 minutes long on each side. Longer tapes may not work well in the cassette player because the tapes are so thin.
5. To load a cassette with the ignition in the OFF position, press EJECT or RECALL.
6. Insert the cassette.
7. If the ignition is in the ON position and the radio is in the OFF position, the tape will begin to play.
8. The player automatically senses the tape cartridge for metal or Cr02 tape media and presets the pre-emphasis.

For metal tapes, "DD" will be displayed.

9. Any time a tape is playing, use the volume, balance, fade, treble, and bass just as with the radio.

An arrow indicates which side of the tape is being played.

10. When you insert a tape, the top of the cassette plays first.

PREV

PROG

Press the PROG push button in order to switch from one side of the tape to the other.

NEXT

REV

DOLBY®

Dolby Noise Reduction is manufactured under a license from Dolby Laboratories Licensing Corporation.

Dolby® and the "DD" symbol are trademarks of Dolby Laboratories Licensing Corporation.

1. Press the Dolby push-button in order to reduce cassette tape noise.
2. The "DD" Dolby® symbol will appear in the display.

FWD

1. Press FWD in order to fast-forward the tape. The tape rapidly advances to the end of the tape or until you press the FWD push-button again.
2. The radio will play the last selected station during the FWD operation.
3. The tape direction arrow blinks during FWD operation.

AM-FM

Press the AM-FM button in order to switch from tape to radio.

TAPE AUX

1. Press TAPE AUX in order to return to the tape player.
2. The lighted arrow appears and shows the direction of play when a tape is in the active mode.

EJECT

1. In order to remove the tape, press EJECT.
2. EJECT may be activated with either the ignition or the radio OFF.
3. Cassettes may be loaded with the radio OFF by pressing EJECT before loading the cassette tape.

CLN

1. If CLN appears on the display, the cassette player needs to be cleaned in order to prevent damage to the tape player.
2. After cleaning the tape player, press and hold EJECT for 5 seconds in order to reset the CLN indicator.
3. The radio displays "- - -" in order to show that the indicator reset.

Playing a Compact Disc - Uplevel

PWR

1. Press the PWR knob in order to turn the system on.
2. The system can be turned on by inserting a compact disc into the player with the ignition in the ON position.
3. Insert a disc partway into the slot, label side up.
4. The player pulls the disc in.
5. When inserted, the disc will begin playing track 1.
6. Wait a few seconds until the disc plays.
7. The letters "CD" and a CD symbol appears on the display.
8. If the disc comes back out and ERR appears on the display, inspect for the following conditions:

•	The disc is upside down.

•	The disc is dirty, scratched, or wet.

•	There is too much moisture in the air.

•	Wait an hour and try again.

•	The vehicle is operating on a very rough road.

•	The disc player is very hot.

9. Press RECALL in order to eliminate the ERR message.

RECALL

1. Press the RECALL button in order to see what track is playing.
2. Press the RECALL button again within 5 seconds in order to see the elapsed time of the current track.
3. The track number appears when a new track begins to play.
4. Press RECALL again in order to return to the time display.

PREV

RDM

1. The random playback (RDM) feature allows the tracks on the compact disc to be played in random order rather than in sequential order.
2. During random playback, a RANDOM indicator appears in the display.
3. Press RDM again in order to return to normal play.

NEXT

1. Press NEXT or the SEEK right arrow in order to search for the next selection.
2. If you hold the NEXT button or press it more than once, the disc will advance further.
3. The next track number will appears on the display.

REV

1. Press and hold the REV button in order to quickly reverse within a track.
2. When the CD reverses, elapsed time displays in order to find the correct passage.

FWD

1. Press and hold the FWD button in order to quickly advance within a track.
2. When the CD advances, elapsed time displays in order to find the correct passage.

AM-FM

1. While in the CD mode, press the AM-FM button in order to stop playing the CD and play the radio.
2. The CD symbol will still be displayed but the letters CD are replaced with AM, FM1, or FM2.
3. If the radio is turned OFF, the disc will remain in the player and resume playing at the point where it stopped, when the radio is turned ON.

CD AUX

1. Press the CD AUX button in order to return from listening to the radio and play the CD.
2. When a disc plays, the letters "CD" and the CD symbol will appear on the display.
3. If the radio is turned OFF, the disc will remain in the player and resume playing at the point where it stopped, when the radio is turned ON.

EJECT

Remote Playback Device - Uplevel

In order to operate the Compact Disc player, perform the following steps:

1. Insert a disk part way into the slot, label side up.
2. If the radio is in the OFF position and the ignition is in the ON position when you insert the CD, the radio turns on and begins playing the CD.
3. In order to load a CD with the ignition in the OFF position, press the EJECT button on the remote player and insert the disc.
4. In order to remove the disc, press the EJECT button and remove the disc.
5. All of the compact disc functions are controlled by the radio buttons except EJECT.
6. When a disc is in the player, a CD symbol appears next to the CD symbol in the bottom left corner on the display.

The track number will also be displayed .

7. If the disc comes back out and ERR appears on the display, inspect for the following conditions:

•	An upside down disc

•	A dirty, scratched, or wet disc

•	Too much moisture in the air

•	If there is too much moisture in the air, wait about 1 hour and try again.

•	The vehicle is operating on a very rough road.

TAPE AUX

1. With a disc loaded in the player and the radio playing, press the TAPE AUX button once in order to play the compact disc.
2. Press AM-FM in order to return to the radio.
3. If you load both a cassette and a CD, press TAPE AUX in order to switch between the tape and the compact disc.

SEEK

1. Press the left arrow while playing a CD in order to go back to the beginning of the current track.
2. The CD goes back to the current track if more than 8 seconds have played.
3. Press the left arrow again in order to go to the previous tracks.
4. Press the right arrow in order to go to the next higher track on the disc.

PREV

1. Press PREV in order to go back to the beginning of a current track.
2. The CD goes back to the current track after 8 seconds have played.
3. Press PREV again in order to go the previous track on the disc.

PROG

The PROG button functions only when the vehicle is equipped with a 12-disc changer.

NEXT

Press the NEXT button in order to advance to the next track on the disc.

REV

1. Press and hold the REV button in order to quickly reverse within a track.
2. When the CD reverses, elapsed time displays in order to find the correct passage.

FWD

1. Press and hold the FWD button in order to advance within a track.
2. When the CD advances, elapsed time displays in order to find the correct passage.

RANDOM

1. Press PSCAN in order to enter the RANDOM play mode.

RANDOM will appear on the display.

2. While in this mode, the tracks on the disc will be played in random order.
3. If you press the SEEK, PREV, or NEXT buttons while in the random mode, the PREV or NEXT track scans randomly.
4. Press PSCAN again in order to turn off RANDOM and return to normal operation.

EJECT

RECALL

1. Press RECALL in order to see what track is playing.
2. Press RECALL again within 5 seconds in order to view elapsed time.
3. Press RECALL a third time and the time of day will be displayed.

Theftlock™ - Uplevel

Important: Read all steps before starting the procedure.

If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4.

If SEC appears on the display in step 4, the system has already been activated.

To change the code, the old code must be removed first.

In order to activate the Theftlock™ system, perform the following steps:

1. Write down any number from 000 to 1999.
2. Turn the ignition to the ACCESSORY or the RUN position.
3. Turn the radio OFF.
4. Press the 1 and 4 push-buttons together. Hold them down until "- - -" shows on the display.
5. Press MN and 000 will appear on the display.
6. Press and hold MN again until the last two digits agree with your code.
7. Press and hold HR to make the first one or two digits agree with your code.
8. Press the AM/FM push button after you have confirmed that the code matches the code you wrote down. If REP appears on the display, repeat steps 5 through 8.
9. SEC will appear on the display, the radio is now operable and secured.
10. With the ignition OFF, the Theftlock™ indicator flashes.

Activating the Theftlock™ Feature

Important: Read all steps before starting the procedure.

If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4.

If SEC appears on the display in step 4, the system has already been activated.

To change the code, the old code must be removed first.

In order to activate the Theftlock™ system, perform the following steps:

1. Write down any number from 000 to 1999.
2. Turn the ignition to the ACCESSORY or the RUN position.
3. Turn the radio OFF.
4. Press the 1 and 4 push-buttons together. Hold them down until "- - -" shows on the display.
5. Press MN and 000 will appear on the display.
6. Press and hold MN again until the last two digits agree with your code.
7. Press and hold HR to make the first one or two digits agree with your code.
8. Press the AM/FM push button after you have confirmed that the code matches the code you wrote down. If REP appears on the display, repeat steps 5 through 8.
9. SEC will appear on the display, the radio is now operable and secured.
10. With the ignition OFF, the Theftlock™ indicator flashes.

Unlocking a Radio That Displays LOC When Code is Known

Important: Read all steps before starting the procedure.

If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 4.

In order to unlock the Theftlock™ system after a power loss, perform the following steps:

1. Write down the users code.
2. Turn the ignition to the RUN position.
3. Press MN and 000 will appear on the display.
4. Press and hold MN until the last 2 digits agree with the code.
5. Press and hold HR until the first one or two digits agree with the code.
6. Press the AM/FM push button after you have confirmed that the code matches the one you wrote down. If REP appears on the display, repeat steps 3 through 6.
7. SEC will appear on the display, the radio is now operable and secured.

If the wrong code is entered more than eight times, INOP will appear on the display.

Wait one hour before attempting to unlock the radio again.

This time only 3 attempts will be allowed before INOP appears on the display.

If this happens you must wait 1 hour before attempting to unlock the radio again.

Unlocking a Radio That Displays LOC When Code is Unknown

Important: Starting in 1995, a factory back-up code can be used to erase the original code if it is unknown.

Have account number ready to enter when asked. Account number is your 5 digit dealer code followed by one of these numbers:

•	Chevrolet - 1

•	Pontiac - 2

•	Oldsmobile - 3

•

Buick - 4

•

GMT - 5

•	Cadillac - 6

•	GM Canada - 7

•	Saturn - 8

Read all steps before starting the procedure.

If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 1.

In order to unlock the Theftlock™ system when code is unknown, perform the following steps:

1. Press and hold push buttons 2 and 3 until a three digit code appears on the display.
2. Write the three digit code on a piece of paper.
3. Press the AM/FM push button, a three digit code will appear on the display again.
4. Write the three digit code on a piece of paper.
5. Call Delco Electronics at 1-800-537-5140.
6. Follow the computer prompts to obtain the back-up code to be used in place of unknown code.
7. Press MN and 000 will appear on the display.
8. Press and hold MN until the last two digits agree with the back-up code.
9. Press and hold HR until the first one or two digits agree with the back-up code.
10. Press the AM/FM push button after you have confirmed that the code matches the one you wrote down. If REP appears on the display, repeat steps 7 through 10.
11. The display will show "- - -" to indicate unknown code has been removed.

If the back-up code does not unlock the radio, try reversing the first and last three digits of the display code.

If this is unsuccessful, call Delco Electronics to obtain a new factory back-up code.

Disabling the Theftlock™ Feature

Important: If more than 15 seconds elapse between any of the steps, the radio automatically reverts to time and you must start the procedure over from step 3.

In order to disable the Theftlock™ feature, enter the user code as follows:

1. Turn the ignition to ACCESSORY or RUN.
2. Turn the radio OFF.
3. Press the 1 and 4 buttons together. Hold then down until SEC appears on the display.
4. Press MN and "000" will appear on the display.
5. Press and hold MN until the last two digits agree with the user code.
6. Press and hold HR until the first one or two digits agree with the user code.
7. Press the AM/FM push button after you have confirmed that the code matches the one you wrote down. If REP appears on the display, repeat steps 4 through 7.
8. The display will show "- - -", indicating that the radio is no longer secured.
9. If the code is entered incorrectly, SEC appears on the display.
10. The radio will remain secured until the correct code is entered.

Rear Seat Audio (RSA)

The rear seat audio controller feature allows the rear seat passengers to listen to a different music source than the front seat passengers including the cassette tape and the remote compact disc (CD) players. 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. Be aware that the primary radio controls always override the rear seat audio controls.

Seek (SEEK)

The sound will mute while seeking. The SEEK button is inactive when the front radio is also using the SEEK feature. Use the following procedure in order to seek:

1. Press the up arrow in order to tune to the next higher station (with enough strength) and stay there.
2. Press the down arrow to tune to the next lower station (with enough strength) and stay there.

Use the following procedure in order to seek selections on a cassette tape:

1. Press the up arrow in order to hear the next selection on the tape.
2. Press the down arrow in order to go back to the previous selection.

Use the following procedure in order to seek selections on a compact disc:

1. Press the up arrow in order to immediately listen to the next track instead of waiting until the current track is finished.
2. Hold the up arrow button or press it more than once in order to advance to further tracks.
3. Press the down arrow in order to go to the start of the current track if more than 8 seconds have played.

Power (PWR)

Press this button in order to turn the rear seat audio system ON or OFF. The rear speakers mute when the power is turned ON. You may operate the rear seat audio functions even when the primary radio power is off.

Band Switching - AM/FM

Press the AM/FM button in order to switch between AM, FM1 and FM2. The selection appears on the display. If the front passengers are already listening to AM-FM, the rear seat audio controller will not switch between the bands and cannot change the frequency.

Source Switching - TAPE CD

Use the following procedure in order to switch between listening sources:

1. Press the TAPE CD button in order to activate the source switching feature. There must be a cassette tape and/or compact disc in the player.
2. Press the TAPE CD button in order to switch between the cassette tape and the compact disc functions.

Preset Program (PSET PROG)

The front passenger must be listening to something different for the PSET PROG to operate. Press the PSET PROG in order to use the following functions:

Use the following procedure in order to operate the volume control:

1. Press lightly on the VOL knob in order to extend the knob.
2. Turn the knob clockwise in order to increase the volume.
3. Turn the knob counterclockwise in order to decrease the volume.
4. Push the knob in when you are not using the volume control.

Radio/Audio System Description and Operation w/ CTF

Table 1:	Radio Features
Table 2:	Cassette Features
Table 3:	Compact Disc Features

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	UM7	UN0/UP0	UC6
Power	Push PWR/VOL knob to turn the radio on.
Volume	The volume is adjusted by rotating the PWR/VOL knob.
Automatic Volume Control	N/A	Press the AUTOVOL Button
Tune	Turn the TUNE/RCL knob	Turn the TUNE/DISP knob	Turn the TUNE/RCL knob
Seek	Momentarily press the left or right SEEK button
Scan	Press and hold the left or right SEEK button for 2 seconds	N/A	Press and hold the left or right SEEK/SCAN button for 2 seconds
Preset Scan	Press and hold the left or right SEEK button for more than 4 seconds	Press and hold the left or right SEEK button for more than 2 seconds	Press and hold the left or right SEEK/SCAN button for more than 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/RCL knob	Push the TUNE/DISP knob	Push the TUNE/RCL knob
Fade or Balance	Press and release the AUDIO button to select and adjust with the arrow buttons	Press and release the AUDIO knob to select and turn to adjust
Bass, Treble or Midrange	Press and release the AUDIO button to select and adjust with the arrow buttons	Press and release the AUDIO knob to select and turn to adjust
Automatic Tone	N/A	Press AUTO TONE Button	Press AUTO EQ Button

Cassette Features

Controls	UP0 Radio
Eject	Eject button
Fast Forward	Preset button 4
Reverse	Preset button 3
Side	Preset button 5
Previous	Preset button 1
Next	Preset button 2

Compact Disc Features

Controls	UN0/UP0		UC6
Eject	Eject button
Fast Forward	Preset button 4		Press the FWD button
Reverse	Preset button 3		Press the REV button
Previous	Preset button 1		Press the left SEEK/SCAN button
Next	Preset button 2		Press the right SEEK/SCAN button
Random	Preset button 6		Press the RDM button

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 miles).

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 miles). 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:

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:

1. A radio is installed from another vehicle
2. A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle

The only way to unlock the radio is by using a scan tool. Always refer to the diagnostic table in this section for further information.

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:

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 RCL" 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: