Contents Wiring diagrams Section: Entertainment Systems All sections

Entertainment System: Other Saturn ION I

Entertainment Systems 3 illustrations ~7646 words

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Identifying Concerns

  1. In order to isolate the source of the noise/poor reception, identify the ignition switch position that the concern is most noticeable. Turn the ignition switch to the accessory position. Turn ON the radio. Seek up 88 to 108 FM then 550 to 1600 AM. Record the number of valid radio stations where the tuner stops. Repeat these steps with the ignition ON, and the engine OFF, then again with the engine running.
  2. Return the ignition switch to the position that the concern was most noticeable.
  3. Remove fuses or circuit breakers one at a time until the noise has been eliminated.
  4. Identify what systems or components are powered by the fuse.
  5. Reinstall all fuses and circuit breakers.
  6. Disconnect the components powered by the fuse one at a time until the concern has been eliminated.

Corrective Action

  1. Inspect the ground integrity of the component or system causing the noise.
  2. Malfunctioning and marginal components such as relays and solenoids may cause noise and/or poor reception.
  3. Always use a braided ground strap when applying additional grounds and keep the ground strap as short as possible.
  4. If the noise source is found to be coming from the vehicle harness: Route the antenna cable separately from the wire harness that is emitting the noise. Use aluminum or nickel tape in order to shield the antenna cable. Try variations of the following repairs: Try adding only aluminum or nickel tape before adding a ground strap to the tape. Wrap a ground strap 360 degrees around the tape, securing the other end of the strap to chassis ground.
  5. Capacitors work best on switch pops and low frequency noise.
  6. Filters work best on high frequency whines and static.
  7. After adding any suppression device, inspect all of the vehicle systems, including those not related to the audio system, for proper operation and function.
  8. Whenever possible, make a test harness that includes filters or capacitors. Always inspect the effectiveness and operation before permanent installation.
  9. If an audible pop is caused due to operating a switch, perform the following repairs as necessary: Add a capacitor across the contacts of the switch. Add a capacitor from the battery positive voltage (B+) side of the switch to chassis ground. Add a capacitor from the ground side of the switch to chassis ground.
  10. Use the following available noise suppression devices: 220 micro farad (50 V) capacitor GM P/N 1227895-Works well for ignition system related noise. 0.47 micro farad capacitor GM P/N 1227894-Works well for switches and relays. Feed through capacitor GM P/N 3906145-Works well for high current situations. Filter package GM P/N 1224205-Works well for low current situations. Fuel pump suppressor GM P/N 25027405 21 inch braided ground strap GM P/N 8910791 19 inch braided ground strap GM P/N 6286800 10.5 inch braided ground strap GM P/N 6287160 8.5 inch braided ground strap GM P/N 12091511

Generator Whine Concerns

  1. Inspect the ground terminal and cable for high resistance.
  2. Inspect the generator and brackets for loose or coated mounting bolts.
  3. Inspect that the ground straps between the engine and the frame are clean and tight.
  4. If the noise is still present, inspect the charging system for proper operation. Refer to «Diagnostic Starting Point - Engine Electrical»(ref-196956-S38051488462005101000000) in Engine Electrical.
  5. Install a filter GM P/N 1224205 in the battery voltage feed circuit to the radio.
  6. If the noise is not eliminated, install the filter in each following variation: Install the filter with the single wire side toward the radio and the ground wire attached to chassis ground. Remove the ground to the filter. Reverse the filter so the 2-wire side is toward the radio with the ground wire attached to chassis ground. Remove the ground from the filter.
  7. If the filter GM P/N 1224205 causes a delay when turning the radio ON or OFF, or other problems, remove the filter and install a 0.47 micro farad capacitor to chassis ground.
  8. Before reassembling the vehicle, remove any unneeded filters.
  9. Test the functionality of all of the vehicle systems, including those not related to the audio system, for proper operation and function.

Power Type Antennas

The following chart and diagram show ohmmeter readings which should be obtained.

Scheme 30

Scheme 30: Power Type Antennas
CalloutComponent Name
1Top Antenna Mast Section
2Middle Antenna Mast Section
3Antenna Metal Housing Case
4Body Ground
5Antenna Lead-in Connector, Outer
6Antenna Lead-in Connector, Inner
7Lower Antenna Mast Section
Ohmmeter Probes At PointsResistance Measured In Ohms
1 and 6Less than 0.2
2 and 6Less than 0.2
7 and 6Less than 0.2
5 and 4Less than 0.2
1 and 4Infinite
2 and 4Infinite
7 and 4Infinite

Radio Poor Reception

Refer to the table when testing the power antenna.

IMPORTANTAlways zero out the DMM before taking a resistance measurement in order to ensure an accurate reading.
  1. Disconnect the negative battery cable.
  2. Measure the resistance at the points specified in the table.
  3. With the ohmmeter probes fastened to each point, wiggle the separate mast section and antenna housing case.
  4. The resistance readings specified in the table should always be obtained. Test and/or replace the following when the resistance readings are out of specification. Replace antenna mast section. Test the ground for an open or high resistance. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  5. After finding and correcting the antenna condition, make sure the antenna lead-in connector is corrosion free and properly fastened.
  6. Operate the system in order to verify the repair.

Windshield Type Antennas

Inspect the antenna connector wire at base of windshield. Make sure the wire is not pinched or broken and is fully seated into the lead-in receptacle.

Inspect dipole wires within the windshield for breaks. Use the figure and table for the mast antenna as a guide to test for continuity within the antenna coaxial cable. Repair or replace any portion of the coaxial cable that does not meet the resistance measurements. If test antenna indicates radio is OK and lead-in checks fine, the windshield may need to be replaced. A defective windshield antenna results in loss of sensitivity, particularly on AM.

Scheme 31

Scheme 31: Windshield Type Antennas
CalloutComponent Name
1Antenna Coaxial Lead-in Connector
2Radio Chassis
3Window Antenna Grid, Front or Rear
4Window Glass, Front or Rear
5Antenna Module
6Antenna Coaxial Lead-in Connector

Rear Defogger Antenna System

IMPORTANTThe following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the test leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

This antenna system uses the existing rear defogger grid as an antenna. Using the defogger as an antenna requires the circuitry in the radio antenna module to decouple the RF from the DC heater current.

Perform the Antenna System Test and test the antenna coax cable prior to performing the following tests.

  1. The radio antenna module is not grounded properly. The module grounding screws should be clean and tight. Measure the resistance from the antenna module base plate to a good ground. Resistance should be 0.2 ohms or less. Find and correct the condition if the resistance is out of specification.
  2. The antenna relay coil supply voltage circuit to the radio antenna module is open or shorted to ground. Test the antenna relay coil supply voltage circuit for an open or short to ground. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  3. Defective radio antenna module-Replace the radio antenna module.
  4. No antenna relay coil supply voltage output from the radio-Disconnect the radio antenna module connector. Turn ON the radio and measure the voltage from the antenna relay coil supply voltage circuit of the radio to a good ground. Voltage measured should be near 12 volts. If no voltage is measured, replace the radio. Refer to «Radio Replacement»(ref-196947-S26182251462005101000000) for service procedure.
  5. If noise is present when the rear defogger is ON, inspect the rear defogger grid for breaks. Repair as necessary.
  6. After finding and correcting the condition, operate the system in order to verify the repair.

Diversity Antenna System

IMPORTANTThe following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the test leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

This antenna system uses 2 antennas to form a diversity system. The primary antenna is part of the rear window. The primary antenna receives both AM and FM signals. The secondary antenna is located on the passenger side of the windshield. The secondary antenna receives only FM signals. The radio antenna module processes the antenna reception signals and phase aligns them to create one strong signal.

Perform the Antenna System Test and test the antenna coax cable prior to performing the following tests

  1. The radio antenna module is not grounded properly. The module grounding screws should be clean and tight. Measure the resistance from the antenna module base plate to a good ground. Resistance should be 0.2 ohms or less. Find and correct the condition if the resistance is out of specification.
  2. The antenna enable signal circuit to the radio antenna module is open or shorted to ground. Test the antenna enable signal circuit for an open or short to ground. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  3. The FM composite signal circuit to the radio antenna module is open or shorted to ground. Test the FM composite signal circuit for an open or short to ground. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  4. Improper retention of the antenna cable in the floating retainer. Poor or no connection with the radio will result when the radio is installed if the antenna cable is not properly attached in the floating retainer. Inspect the antenna cable for movement in the floating retainer. Replace the antenna cable if movement is found.
  5. Defective radio antenna module-Replace radio antenna module.
  6. No FM composite signal voltage output from the radio-Disconnect the radio antenna module connector. Turn ON the radio and tune the radio to the FM band. Measure the voltage from the FM composite signal circuit of the radio antenna module to a good ground. Voltage measured should be near 8 volts. If no voltage is measured, replace the radio. Refer to «Radio Replacement»(ref-196947-S26182251462005101000000) for service procedure.
  7. After finding and correcting the condition, operate the system in order to verify the repair.

Digital Radio Poor or No Reception

StepActionValuesYesNo
Schematic Reference: Radio/Audio System Schematics Connector End View Reference: Entertainment Connector End Views
1Did you perform the Diagnostic System Check - Vehicle?Go to Step 2Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2Make sure the vehicle is outside in an area with an unobstructed view of the southern sky. Turn ON the ignition, with the engine OFF. Turn ON the radio. Tune the radio to satellite channel 1. Is the reception clear?Go to Step 3Go to Step 5
3Tune the radio to several other satellite channels. Is the reception clear?Go to Audio System Troubleshooting HintsGo to Step 4
4Contact XM at 1-800-556-3600 to verify customer account status or possible network problems. Did you find and correct the condition?Go to Step 14Go to Step 10
5Contact XM at 1-800-556-3600 to verify possible network problems. Did you find and correct the condition?Go to Step 14Go to Step 6
6With a scan tool, observe the digital radio antenna in the digital radio receiver data list. Does the scan tool indicate that the digital radio antenna is within the specified range?1200-1800 mVGo to Step 10Go to Step 7
7Disconnect the antenna cables from the digital radio receiver. Measure the voltage from the center conductor of the inboard antenna connector on the digital radio receiver to one of the case screws. Does the voltage measure within the specified range?4.5-5.5 VGo to Step 8Go to Step 10
8Test the antenna cables for an open, short, or high resistance. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find the condition?Go to Step 9Go to Step 11
9Replace the antenna cable. Refer to Coaxial Cable Replacement - Digital Radio . Did you complete the replacement?Go to Step 14
10Inspect for poor connections at the digital radio receiver. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition?Go to Step 14Go to Step 12
11Inspect for poor connections at the digital radio antenna. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition?Go to Step 14Go to Step 13
12Replace the digital radio receiver. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?Go to Step 14
13Replace the digital radio antenna. Refer to Antenna Replacement - Digital Radio . Did you complete the replacement?Go to Step 14
14Operate the system in order to verify the repair. Did you correct the condition?System OKGo to Step 2

Digital Radio Poor or No Reception

Audio Distortion - One or More Speakers

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

With RPO U2K

Audio output signal circuit from digital radio receiver open-Test left, right, and audio common signal circuits for opens. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Radio Displays Err1, Err2, ----, or LOCK

Refer to Theft Deterrent Feature in Radio/Audio System Description and Operation .

Only Front Speakers or Only Rear Speakers Inoperative (ION-RPO UZ6 only) (VUE-RPO WBM only)

IMPORTANTThe following information lists the most probable cause of the concern to the least probable cause, followed by the appropriate test for the condition. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Audio output from amplifier to speaker shorted to ground or shorted to battery positive voltage.

Test the affected audio output circuits from the amplifier for a short to ground or a short to positive battery voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Speaker Inoperative - One or More

Without RPO UZ6 (ION) or RPO WBM (VUE)

  1. No audio output from the radio-Test for any AC voltage between the audio signal circuits at the affected speaker connector with the radio volume adjusted to 50 percent. If no AC voltage is present, check for shorts to battery positive voltage or shorts to ground on all speaker output circuits from the radio. If no shorts are located, replace the radio. Refer to «Radio Replacement»(ref-196947-S26182251462005101000000) .
  2. Speaker output open-Test the appropriate speaker outputs for an open. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  3. Defective speaker-Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(ref-196947-S22044639292005101000000) .

With RPO UZ6 (ION) or RPO WBM (VUE)

  1. Speaker output from amplifier open-Test the appropriate speaker outputs for an open. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  2. Defective speaker-Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(ref-196947-S22044639292005101000000) .
  3. No audio output from the amplifier-Test for any AC voltage between the audio signal circuits at the affected speaker connector with the radio volume adjusted to 50 percent. If no AC voltage is present, check for shorts to battery positive voltage or shorts to ground on the affected speaker outputs. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems. If no shorts are located, replace the amplifier. Refer to «Amplifier Replacement»(ref-196947-S12873156232005101000000) .

Without RPO UZ6 (ION) or RPO WBM (VUE)

No audio output from the radio-Test for any AC voltage between the left front audio signal circuits at the left front speaker connector with the radio volume adjusted to 50 percent. If no AC voltage is present, check for shorts to battery positive or shorts to ground on any speaker output circuit from the radio. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If no shorts are located, replace the radio. Refer to Radio Replacement .

With RPO UZ6 (ION) or RPO WBM (VUE)

  1. Battery positive voltage to the amplifier open-Test the battery positive circuit to the amplifier for an open. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  2. Ground to the amplifier open-Test the ground circuit to the amplifier for an open. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  3. No low level audio output from the radio-Test for any AC voltage between the left front low level audio signal circuits at the amplifier connector with the radio volume adjusted to 50 percent. If no AC voltage is present, check for shorts to battery positive or shorts to ground on any speaker output circuit from the radio. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems. If no shorts are located, replace the radio. Refer to «Radio Replacement»(ref-196947-S26182251462005101000000) .
  4. No radio on signal to the amplifier-Test the radio on signal circuit to the amplifier for an open. Refer to «Circuit Testing»(ref-196941-S24203714422005101000000) and «Wiring Repairs»(ref-196941-S18892974492005101000000) in Wiring Systems.
  5. Defective amplifier-Replace the amplifier. Refer to «Amplifier Replacement»(ref-196947-S12873156232005101000000) .

Radio Setup

To setup a new radio for the vehicle, complete the setup procedure under the Special Functions menu of the scan tool.

If the new radio is not properly setup, the radio will display a locked message (LOC) or Calibrate.

IMPORTANTThe radio setup will configure the radio amplifier and internal equalization settings. Without following the setup procedure, the radio will display a calibrate message (CALIBRATE), and the sound quality and volume may be degraded.

Digital Radio Receiver Setup

IMPORTANTThe digital radio receiver setup option does not contain a submenu. Digital radio receiver setup will configure the following systems: DTCs GMLAN and class 2 radio messages

To setup the digital radio receiver, complete the setup procedure under the Special Functions menu of the scan tool, then cycle ignition.

XM Activation

IMPORTANTAfter replacement of an XM receiver, call XM radio to deactivate the receiver that has been removed from the vehicle and activate the new XM radio receiver. The vehicle must be parked in view of a satellite within 24 hours after an activation call.
  1. Turn the radio ON, tune to the XM channel 0, and record the radio ID. The radio ID will be needed for activation of the new receiver.
  2. Call XM radio at 1-800-556-3600 to deactivate the faulty receiver and activate the new receiver.
  3. Park the vehicle outside in an area with an unobstructed view of the southern sky.
  4. Leave the vehicle outside with the ignition switch in the ACC position and the radio on for 30 minutes to activate XM service.
  5. Once activated, the radio will receive the remaining XM channels.

Contents

  1. Regular Production Options (RPO)
  2. Features
  3. Circuit Description
  4. Component Description
  5. Customer Tips
  6. On Board Diagnostics
  7. Theft Deterrent Feature

RPO Options

The entertainment system on this vehicle is configured with either a base or uplevel audio system. Both the base and uplevel audio systems contain a radio, antenna, and speakers.

The following shows the entertainment regular production options (RPOs) that are available for this vehicle

  1. (UM7) AM/FM Stereo
  2. (U1C) AM/FM Stereo CD
  3. (US8) AM/FM Stereo, CD, MP3, RDS, EQ
  4. (US9) AM/FM Stereo, 6-Disc CD, MP3, RDS, EQ
  5. (UX7) Base Four Speaker
  6. (U79) Uplevel Four Speaker
  7. (UZ6) Premium Audio
  8. (U2K) Digital Radio
ControlsAM/FM Radio (UM7)AM/FM CD Radio (U1C)AM/FM Single CD/MP3 (US8)AM/FM 6 Disc CD/MP3 (US9)
PowerPush the VOL Knob
VolumeRotate the VOL knob
RecallPush the RCL button
Recall PresetPush station preset rocker buttons 1-6Push station present buttons 1-6.
Save PresetTune Radio to desired frequency. Push and hold desired preset button until tone is heard.
BandPress AM/FMPress AM/FM. If listening to CD, will change function from CD to radio.Press AM/FM. If listening to CD or XM, will change function to radio.
A. SetPress and hold AM/FM button until tone is generated. The radio will automatically scan and preset the strongest stations. Press and hold again to cancel.
BalanceLightly pull out on VOL knob. Detent signifies center of balance.Press MODE button until BAL is displayed, then use + or - button to adjust.Press BASS/TREB/FAD/BAL button until BAL is displayed. Rotate knob to desired setting.
FadeRotate the FADE ring. Detent signifies center of balance.Press MODE button until FAD is displayed, then use + or - button to adjust.Press BASS/TREB/FAD/BAL button until FAD is displayed. Rotate knob to desired setting.
BassPress BASS/TREB knob to release. Rotate to change amount of bass in audio.Press MODE button until BAS is displayed, then use + or - button to adjust.Press BASS/TREB/FAD/BAL button until BASS is displayed. Rotate knob to desired setting.
TreblePress BASS/TREB knob to release. Lightly pull outward. Rotate to change amount of treble in audio.Press MODE button until TREB is displayed, then use + or - button to adjust.Press BASS/TREB/FAD/BAL knob until TREB is displayed. Rotate knob to desired setting.
TuneTUNE/SEEK rocker manually increases or decreases frequency.TUNE/SEEK rocker manually increases or decreases frequency.Rotate TUNE knob to manually increase or decrease station frequency.
SeekHold TUNE/SEEK rocker until tone sounds. Radio will automatically increase or decrease frequency to next receivable station.Momentarily press the SEEK rocker to automatically increase or decrease frequency to next receivable station.
ScanPress SCN button to automatically scan through all stations sequentially, pausing at each one for 5 seconds.Press SEEK rocker button until tone is generated to automatically scan through, in either ascending or descending order, pausing at each receivable station.
Tone ControlUse either side of the AUTO TONE rocker to scroll through the preset tone options.
Setting ClockPush and hold RCL button. While holding RCL, push the left side of the TUNE/SEEK rocker button until the correct hour appears. While holding RCL, push the right side of the TUNE/SEEK rocker until the correct minute appears. Release the RCL button when finished.Push and hold RCL button. While holding RCL, push the left side of the auto tone rocker button until the correct hour appears. While holding RCL, push the right side of the auto tone rocker until the correct minute appears. Release the RCL button when finished.

Radio Features

ControlsAM/FM Radio (UM7)AM/FM CD Radio (U1C)AM/FM Single CD/MP3 (US8)AM/FM 6 Disc CD/MP3 (US9)
Change ModesPress CD button to change function from radio to CD. CD begins to play automatically.Press AUX button to change between CD/MP3 and XM (if available). Operation only available if CD is already loaded.Press AUX button to change between CD/MP3 and XM (if available). Operation only available if CD is already loaded.
Play CDCD will automatically begin to play when one is inserted.CD will automatically begin to play when one is loaded.
Eject SINGLE CDPress the EJECT button.Press the EJECT button. Then press the preset button when prompted to indicate which CD should ejected, or which slot should be loaded.
Eject ALL CDsPress and hold the EJECT button and all discs are ejected in order. "LOAD" is then displayed.
Load Single CDInsert CD into empty player, or press CD button and insert disc when prompted.Press CD button for less than three seconds. Radio will prompt use to select which location to load a CD. User selects location by pressing preset/disc buttons 1-6.
Load ALL CDsPress and hold CD button for at least 3 seconds. The radio will prompt user to insert discs to fill all empty slots.
Previous TrackPress the PRV button.Press preset 1 button, or rotate TUNE knob clockwise.
Next TrackPress the NXT button.Press preset 2 button, or rotate TUNE knob counterclockwise.
RewindPress and hold REV button.Press and hold left side of < > button.
Fast ForwardPress and hold FWD button.Press and hold right side of < > button.
Random Track OrderPress the RDM button. Press again to cancel.Press the RDM button. Press again to cancel.Press RDM to random play current disc. Press and hold for 2 seconds to random play all discs. Press again to cancel.
RepeatPress the RPT button to repeat the current track. Press again to cancel.Press the RPT button to repeat the current disc. Press again to cancel.
Previous DiscPress left side of SEEK rocker button.
Next DiscPress right side of SEEK rocker button

CD Player Features

ControlsAM/FM Radio (UM7)AM/FM CD Radio (U1C)AM/FM Single CD/MP3 (US8)AM/FM 6 Disc CD/MP3 (US9)
Change FolderPress < > rocker button to scroll through available folders
Previous TrackPress preset 1 button
Next TrackPress preset 2 button
Pause/PlayPress preset 3 button
RandomPress RDM to random play current disc. Press and hold for more than 2 seconds to random play current directory. Press again to cancel.
RepeatPress RPT button to repeat one track. Press again to cancel.Press RPT to repeat entire disc. Press again to cancel.
InfoPress left side of i/TRAF button to scroll through available track information, including Song Title, Artist Name, Album Name, Filename, and Directory Name.
Fast ForwardHold right side of < > button.
Fast ReverseHold left side of < > button.
ScanPress and hold SEK rocker button to play first 10 seconds of each song in ascending or descending order.
DisplayTo change the default display of "ELAPSED" and the track time: Press the left side of the i/TRAF button to scroll through the available information Once the desired information is displayed, press and hold the RCL button for 5 seconds and the radio will use the current information as the default display.

MP3 Features

Antenna System

The antenna system receives broadcast AM or FM stereo signals from free space and sends the signals to the radio receiver for processing via a coaxial antenna cable. Good antenna grounding is important for good radio reception.

The antenna base and mast should be installed to the torque specifications provided in the Antenna Replacement - Digital Radio procedures.

The antenna mast is a single 1/4 wave design located at the right front fender.

Ground Strap

The braided ground strap, which is connected between the radio case and the instrument panel fuse block (IPFB), is provided to improve reception and deter noise from entering the audio system.

Radio

The operator interfaces with the radio system through the radio display and controls. Through these controls, the operator is able to control system power, volume, fade, balance, bass, and treble equalizations. Control on the integrated CD, MP3, or XM Satellite Radio System is also available when equipped with these options. A vacuum florescent display (VFD) provides system feedback to the operator.

The radio processes the AM and FM signals from the antenna system or the information from the CD media, amplifies that information, and sends the output to the speaker system.

The radio is located in the instrument panel (I/P) center stack area and is fastened to the I/P by 2 fasteners. Guide pins are provided to aid in aligning the radio. Electrical connections to the radio are a 24-way connector from the I/P harness, antenna lead connector, and braided ground strap. An additional 12-way harness connector is present on OnStar® equipped vehicles. Additional service length is provided in the radio harnesses to allow connection prior to radio installation.

Clock time is displayed continuously on the UM7 and U1C radios when the ignition is OFF. Pressing the RCL provides momentary backlighting. Time is not displayed on the US8 and US9 radios when the ignition is OFF. Pressing RCL will temporarily display the time.

Radio amplifier outputs to the speakers are protected from damage should speaker leads become shorted to ground or shorted to vehicle power. The radio will sense these conditions and shut down the amplifier outputs in a non-destructive manner. After the short condition is removed, the radio will return to normal operation.

Speakers

The speaker system consists of 4 speakers, mounted in the doors and rear package shelf. The optional speaker system, RPO UZ6, includes an additional speaker mounted in the front driver and passenger door mirror trim panel.

OnStar®

OnStar® equipped, RPO UE1, vehicles use the radio amplifier and speaker system for voice communication from the OnStar® operator to the vehicle. Voice communication from the vehicle to the OnStar® operator is through the OnStar® microphone and module, which is not a part of the radio system.

When OnStar® begins operation, the radio volume is set to a preset level, autotone preset for OnStar® becomes active and the fade control is adjusted to the full front speakers. The radio volume control can then be used to adjust the volume to a desired level.

The radio system and OnStar® system are connected through the 12-way connector at the back of the radio. Left and right channel OnStar® audio, mute control of radio functions by OnStar®, and the audio signal ground are the circuits provided in the 12-way connector.

Disconnecting the 12-way connector from the radio will isolate the radio system from the OnStar® system. Voice communication from the vehicle to the OnStar® operator could be possible under this condition. However, the vehicle occupant will not be able to hear the OnStar® operator.

For more information regarding radio operation problems, refer to Symptoms - Entertainment and Diagnostic System Check - Vehicle in Vehicle DTC Information. For further information regarding OnStar® operation, refer to the OnStar® section of this service manual.

Amplifier

Vehicles equipped with premium audio (RPO UZ6) include an amplifier. The amplifier has low level inputs from the radio for the 4 speaker channels and amplifies the sound. The amplifier receives a radio on signal from the radio. This signal is delayed momentarily at initial key on to prevent any speaker pops during startup.

The purpose of an amplifier is to increase the power of a voltage or current signal. The output signal of an amplifier may consist of the same frequencies as the input signal or it may consist of only a portion of the frequencies of the input signal, as in the case of a subwoofer or a mid-range amplifier.

Radio Reception - FM

Select Stations Within Range: The best FM fidelity will be obtained from stations within a 16-64 km (10-40 mi) range. Noise or distortion may become apparent when attempting to receive stations at distances greater than this range.

Suggestion: Reduce treble response when attempting to receive fringe stations.

Tall Structures: Tall buildings or hills may cause degrading or loss of signal. FM stations tend to travel "line of sight." Buildings or hills can interrupt the FM signal.

Suggestion: Reduce treble response.

Interference from another station: Although receiver circuits are among the most advanced type available, there are instances where a radio station can be interfered with by another station.

Suggestion: Select another station or switch to a cassette or CD.

Radio Reception - AM

Static Interference During Weather Disturbances: AM reception is sensitive to storm disturbances such as lightning.

Suggestion: Reduce treble response or select an FM station for weather related information.

Care of Compact Discs

  1. Handle compact discs (CDs) carefully. Touch only the outer edges of the CD or the edge of the hole in the center of the CD. Never touch the glossy side of the CD. Fingerprints and scratches will interrupt the "reading" of the information on the disc.
  2. Store CDs in their protective cases. Store CDs away from sunlight, dirt, dust, and debris.
  3. Do not attach a label or tape to a CD.
  4. Always check for scratches and signs of wear on both sides of the CD.
  5. Never place any marks on the CD with a marker.
  6. If a CD becomes contaminated, clean it with a clean, damp, soft, lint-free cloth and mild detergent. Wipe the CD in a straight line from the center hole outward. Do not use cleaning solutions which may damage the CD, such as chemically treated cleaning cloths, benzene, or paint thinners.

Compact Discs Not Appropriate to Use

These CD players were designed to be compatible with round digital audio CDs with the "Compact Disc Digital Audio" label. Other CDs may be incompatible, causing a no-play condition, excessive skips, ERR shown on the radio display or a jam in the loading mechanism. Some incompatible CD types are

  1. Special-shaped CDs (any that are not round)
  2. Re-Writeable CDs (CD-RW type are incompatible)
  3. Recordable CDs (CD-R type are incompatible, except with US8 or US9 radios)
  4. Library CDs (with thick bar code labels)
  5. CD with user-applied labels

LCD Display Segment Mode

The LCD Display Segment Mode is available to verify that all display segments are operating properly. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. If any display segments are not displayed, replace the radio. Refer to Radio Replacement . Press the appropriate button to return to the OBD menu.

Scheme 32

Scheme 32: LCD Display Segment Mode

Antenna Signal Meter Mode (if available)

The antenna signal meter mode is available to evaluate signal strength. Refer to Enter On Board Diagnostic Mode procedure prior to referencing this information. Once this mode is entered, the audio of the last tuned station is played while the signal strength is displayed. This function may be useful for performing a side-by-side, vehicle-to-vehicle comparison, for evaluating audio system reception complaints. Press the appropriate button to return to the OBD menu.

Theft Deterrent Feature

The U1C, US8, and US9 are equipped with a programmable theft deterrent feature. When the radio has the SEC (armed) mode activated, the radio will enter the LOCK (locked) mode if the power between the battery and the radio is interrupted for more than 20 seconds. While in the locked mode, "LOCK" appears on the radio display and all radio functions are disabled.

When the vehicle is first purchased or the radio is new or remanufactured, the theft deterrent feature is unarmed. If desired, the customer must program a 4-digit code into the radio to activate the theft deterrent feature.

Operating Modes

The theft deterrent feature causes 3 operating modes

  1. VULNERABLE (UNARMED) MODE - The radio does not have a 4-digit code stored. If stolen, the radio will operate normally when power is applied.
  2. SECURE (ARMED) MODE - The radio has a 4-digit code stored. The radio will enter the LOCK (locked) mode if the power between the battery and the radio is interrupted for more than 20 seconds.
  3. LOCK (LOCKED) MODE - The radio has been removed from power for more than 20 seconds or the wrong 4-digit code has been entered while in the SEC (armed) mode.
IMPORTANTBefore performing service on a vehicle, verify the theft deterrent feature is in the VULNERABLE (unarmed) mode. This check is made by the following steps: Turn the ignition ON. Radio OFF. Press and hold preset buttons "1" and "2" for 5 seconds. If SEC (armed), a 4-digit number will appear on the radio display. This number is NOT the customer's code. Ask the customer to disarm the feature by following the procedure given in the owners manual. The procedure is the same procedure used for activating the theft deterrent feature. If no number appears, the theft deterrent feature is VULNERABLE (unarmed) and service may be performed.

Activating Theft Deterrent

To arm the theft deterrent feature on the U1C radio, perform the following

  1. Turn the ignition ON. Radio OFF.
  2. Press and hold preset buttons 5 and 6, at the same time, for 5 seconds. The radio will display "- - - -".
  3. Have the customer select a 4-digit code. Suggest to use a number that is familiar to them.
  4. Enter the 4-digit code by using the SEEK/SCAN and TUNE rocker buttons (U1C) or by using the SEEK and AUTO EQ rocker buttons (US8 and US9). The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed. U1C Radio Press the down arrow side of the SEEK/SCAN rocker button to change the left digit. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit. Press the down arrow side of the TUNE rocker button to change the third to left digit. Press the up arrow side of the TUNE rocker button to change the fourth to left digit. US8 and US9 Radios Press the left arrow side of the SEEK rocker button to change the left digit. Press the right arrow side of the SEEK rocker button to change the second to left digit. Press the left arrow side of the AUTO EQ rocker button to change the third to left digit. Press the right arrow side of the AUTO EQ rocker button to change the fourth to left digit.
  5. Push the AM/FM button.
  6. The display prompt you to repeat the code, requesting the 4-digit code to be entered again to verify correct entry. Enter the same 4-digit code, using the applicable rocker buttons. U1C Radio Press the down arrow side of the SEEK/SCAN rocker button to change the left digit. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit. Press the down arrow side of the TUNE rocker button to change the third to left digit. Press the up arrow side of the TUNE rocker button to change the fourth to left digit. US8 and US9 Radios Press the left arrow side of the SEEK rocker button to change the left digit. Press the right arrow side of the SEEK rocker button to change the second to left digit. Press the left arrow side of the AUTO EQ rocker button to change the third to left digit. Press the right arrow side of the AUTO EQ rocker button to change the fourth to left digit.
  7. Push the AM/FM button to store the code.
  8. The display will show "SEC" (U1C) or "SECURITY ON" (US8 and US9) indicating the radio is armed and the radio will return to normal operation.

If the radio displays "Err1", "Err2", or "LOCK", then the radio was already in the secure state and is armed with a different code than the one that was entered. Proceed to the appropriate part of this Theft Deterrent section to deactivate the system if deactivation is desired.

Deactivating the Theft Deterrent Feature-Radio in "SEC" (ARMED) MODE

To deactivate the theft deterrent feature, enter the customer's code or the factory unlock code using steps 1-7 of the "Activating Theft Deterrent" procedure that applies to the radio in this section. After completing those steps, the display will show no number. This indicates the theft deterrent feature is in the VULNERABLE (unarmed) mode and service may be performed.

When the vehicle is returned to the customer, remind the customer to reactivate the theft deterrent feature using the procedure given in the owner's manual.

Deactivating Theft Deterrent-Radio in "LOCK" or "- - - -" MODE (CODE KNOWN)

When the theft deterrent feature is in the SEC (armed) mode, the radio can enter the locked state if the power is removed for greater than 20 seconds or an incorrect code entry is attempted three times. An error message is displayed after every wrong entry.

When the radio is in the LOCK (locked) mode, "LOCK" is displayed and all radio functions are disabled.

Before another attempt at the correct code can be made, the radio must be ON and the display must show "LOCK" for an hour. After an hour, "- - - -" will be displayed and the correct code may be entered using the following steps.

  1. Turn the ignition ON.
  2. Press the power button on the radio. The display will show "- - - -".
  3. Enter the 4-digit code by using the SEEK/SCAN and TUNE rocker buttons (U1C) or by using the SEEK and AUTO EQ rocker buttons (US8 and US9). The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed. U1C Radio Press the down arrow side of the SEEK/SCAN rocker button to change the left digit. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit. Press the down arrow side of the TUNE rocker button to change the third to left digit. Press the up arrow side of the TUNE rocker button to change the fourth to left digit. US8 and US9 Radios Press the left arrow side of the SEEK rocker button to change the left digit. Press the right arrow side of the SEEK rocker button to change the second to left digit. Press the left arrow side of the AUTO EQ rocker button to change the third to left digit. Press the right arrow side of the AUTO EQ rocker button to change the fourth to left digit.
  4. Press the AM/FM button after entering the 4-digit code. If the incorrect code has been entered, the radio will return to the SEC (armed) mode and normal operation will return. If the wrong code is entered, the display will show an error message and display "- - - -" indicating another attempt at the correct code can be made.

Deactivating Theft Deterrent - Radio in "LOCK" or "- - - -" Mode (Code Unknown)

When the theft deterrent feature is armed or secure (SEC), the radio can enter the locked state if the power is removed from the radio for greater than 20 seconds or an incorrect code is attempted 3 times. An error message is displayed after every wrong entry.

When the radio is in the LOCK (locked) mode, "LOCK" is displayed and all radio functions are disabled.

Before another attempt at the correct code can be made, the radio must be ON and the display must show "LOCK" for an hour. After an hour, "- - - -" will be displayed and the correct code may be entered using the following steps

If the customer code is unknown, perform the following steps to retrieve the customer code

  1. Turn the ignition ON.
  2. Turn radio power OFF.
  3. Press and hold preset buttons 1 and 2 for 5 seconds. A 4-digit code will be displayed. This number is not the customers code. Record this number as it is needed before technical support is called.
  4. Using a touch tone phone only, call the technical support system at 1-888-225-2306 (USA and Canada). When advised, give the following information: Your retailer code The 4-digit radio display code obtained in step 3 In response, you will receive the factory unlock code; record this number NOTE: The factory unlock code received is the same as the code that was entered by the customer.
  5. Turn the ignition ON.
  6. Press the radio power button. The display will show "- - - -".
  7. Enter the 4-digit code by using the SEEK/SCAN and TUNE rocker buttons (U1C) or by using the SEEK and AUTO EQ rocker buttons (US8 and US9). The numbers will start at 0000 and will increase on the display each time the corresponding side of the rocker button is pushed. U1C Radio Press the down arrow side of the SEEK/SCAN rocker button to change the left digit. Press the up arrow side of the SEEK/SCAN rocker button to change the second to left digit. Press the down arrow side of the TUNE rocker button to change the third to left digit. Press the up arrow side of the TUNE rocker button to change the fourth to left digit. US8 and US9 Radios Press the left arrow side of the SEEK rocker button to change the left digit. Press the right arrow side of the SEEK rocker button to change the second to left digit. Press the left arrow side of the AUTO EQ rocker button to change the third to left digit. Press the right arrow side of the AUTO EQ rocker button to change the fourth to left digit.
  8. Press the AM/FM button after entering the 4-digit code. If the correct code has been entered, the radio will return to the SEC (armed) mode and normal operation will return. If the wrong code has been entered, the display will show an error message and display "- - - -" indicating another attempt at the correct code can be made.

Radio Data System (RDS)

The CD/MP3 audio systems are equipped with technology known as the Radio Data System (RDS). The RDS is a system that sends data along with the audio of the FM station you are currently tuned to. The 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 the program to your receiver.

RDS Basic Information

  1. RDS functions are provided in the FM broadcast band only.
  2. RDS functions will only work with FM broadcast stations that are broadcasting RDS data.
  3. Not all FM Broadcast stations broadcast RDS data or offer all of the RDS services.
  4. RDS functions may not work properly when reception is weak, reception is of poor quality, or the FM Broadcaster does not implement RDS properly.

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

Displaying RDS Information

The RDS feature is always ON. When tuned to a non-RDS station, the radio will display frequency information as you would normally expect. When tuned to an RDS station, the radio can operate as follows

  1. The 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.
  2. Display the type of program.
  3. Display general information such as artist and song title, call in phone numbers, etc.

Viewing and Selecting RDS Information for Display

Press the RCL button once for less than 2 seconds when the radio displays the program service (PS) name and the frequency of the station will be displayed. Press the button again, and the program type (P-Type) will be displayed. Pressed again, and the program type (PTY) name will be displayed, if the broadcaster is broadcasting one. The PTY name is an eight-character name that the broadcaster may use to further identify the type of programming currently being broadcast. Should you decide that Frequency, P-Type or PTY name is more desirable to display when tuned to an RDS station than the PS name, press the RCL button until the desired information is displayed, then press and hold for more than 2 seconds. A beep should be heard and the radio will now display the selected information whenever tuned to an RDS broadcaster. The radio will display frequency for all non-RDS broadcast stations.

Using RDS Program Types to Tune Radio

Listed are several ways on how to tune your radio using RDS program types. The radio will now be configured to tune based on RDS data rather than frequency

Finding a RDS Station By Specific Program Type

  1. Press the PROG TYPE or P-TYPE button, the radio will display the current P-Type to search for.
  2. Press the CAT rocker button until the desired program type is shown in the display.
  3. Press the SEEK button and the radio will now seek the first RDS Broadcaster of the selected P-Type.

If the radio cannot find the desired P-Type, the radio displays NOT FOUND and will return to the last station you were listening to.

Using the INFO Feature

When the INFO icon appears in the radio display, a new text message is available for viewing. These text messages are from the RDS broadcaster to the listening public and may be general information such as artist and song title, call in phone numbers, etc.

How to View the INFO Message

  1. To view the message when the INFO icon appears, press the INFO button to display the text message. If you do not press the INFO button again, the text message will automatically be displayed 8 characters at a time, 3 seconds between updates.
  2. To view the text message faster, press the INFO button for less than 1 second to scroll through the message at your own speed.
  3. The INFO icon disappears as soon as you press the INFO button. The INFO icon will appear when a new different message is received.
  4. To view the most recent received message, press the INFO icon at any time, even if the icon does not appear in the display.

Controlling the Radio

The user can activate RDS to control the radio by using the data received to do the following

  1. Interrupt the playback of your CD for traffic or emergency bulletins.
  2. Search for stations by type of program.
  3. Set your clock to the time that the RDS broadcast station broadcasts.

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 TA icon in the radio display. Not all FM broadcasters will use this RDS feature. 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 "TA" icon will appear on the radio display, as will brackets around the [TA] icon. If the radio cannot find an RDS traffic station after searching through the entire FM band, the radio will display NO TRAFFIC.

Traffic Interrupt Feature

Whenever the TA icon is displayed, the current FM station may also broadcast traffic announcements. Traffic announcements are reports of the current traffic conditions in the listening area of the tuned FM broadcasters.

Your radio can interrupt the playback of a compact disc by use of the traffic interrupt feature. The traffic interrupt feature is enabled when the TRAF icon is displayed.

If the broadcaster sends out a traffic announcement while you are listening to FM or in the playback mode, TRAFFIC will be displayed on the radio and the audio from the broadcaster will be heard. At the conclusion of the traffic announcement, the radio will return to the previous playback mode.

During the time the radio displays TRAFFIC, you can adjust the volume of the traffic announcement. This will be the volume at which all future traffic announcements will be heard until the volume during another traffic announcement is adjusted.

You can also interrupt a traffic announcement interrupt by pressing the TRAF button.

During a national or local emergency, a special program type interrupt message ALERT! is displayed. This special announcement will cancel all other RDS features that are in progress, such as a traffic announcement.

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

  1. Press and hold the RCL and RDS buttons together for two or more seconds to update the time.
  2. The display will show SET RDS TIME after receiving the broadcasted time data.
  3. If the broadcaster is not broadcasting the time data, the radio will display NO RDS TIME SET and the time remains unchanged.

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

  1. The power output, or wattage, of the broadcasting station
  2. The location of the vehicle, or receiver, relative to the broadcast tower.
  3. Obstacles between the tower and the receiver
  4. Atmospheric conditions
  5. Which band, AM or FM, the station is broadcasting
  6. Type of antenna and the ground plane

AM Reception

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

  1. Bend around obstacles
  2. Follow the curvature of the earth
  3. May reflect, or skip, off of the ionosphere

The AM frequencies have longer range due to the ground wave. The ground wave follows the curvature of the earth and is affected 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

  1. Reflect off obstacles
  2. Are absorbed by the ground
  3. Penetrate the ionosphere

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

  1. Height of the broadcast antenna
  2. Height of the receiving antenna
  3. Terrain and buildings in the broadcast path

XM Reception

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 areas. 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.

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 remote radio audio signals to the radio.

Viewing Messages

Press the DISP or RCL button while in XM mode to view various pieces of information related to the current song or channel. By pressing and releasing the DISP or RCL button, 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. If an Additional Information message is being broadcast on the tuned channel, the INFO icon will appear on the display. Each of the four information types may have multiple pages of text. To reach a category, press and release the DISP or RCL button 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 DISP or RCL button to review all of the pages at your own pace.

Radio Display MessageCondition
UpdatingUpdating encryption code
No SignalLoss of signal
Loading XMAcquiring channel audio (after 4 second delay)
CH Off AirChannel not in service
CH UnavailChannel no longer available
No InfoArtist Name/Feature not available
No InfoSong/Program Title not available
No InfoCategory name not available
Not FoundNo channel available for the chosen category
No InfoNo text/informational message available
XM LockedTheft Lock active
Radio IDElectronic serial number (ESN) channel 0
UnknownRadio ID not known (should only be if hardware failure
Chk XMRcvrHardware failure

XM Advisory Messages

Technical Information for the MP3/CD Radios (US8, US9)

The US8 and US9 radios will play both standard audio CDs and CD-Rs or CD-RWs. The CD-R/RWs may contain either standard audio (*.cda) or compressed audio (*.mp3).

Customers who record their own music CD-R/RWs should be aware of the following

  1. The files can be recorded on a CD-R/RW disc with a maximum capacity of 700 MB.
  2. The radio will play only compressed audio files recorded in the *.mp3 format. It also supports playlists that can be made and saved with popular MP3 software (in the *.m3u format). A playlist name must be no more than 32 characters in length. If the name of a playlist is longer than 32 characters, the radio will ignore the playlist.
  3. The radio will only play audio from a CD-R/RW, it cannot record audio.
  4. The radio will play a mixed mode CD-R/RW (one recorded with both *.cda and *.mp3 files). If a mixed mode CD is inserted in the radio, the radio will assign the standard CD audio to a directory which is listed as ROM audio directory.
  5. The radio supports multi-session discs, but only the files from the last session will be played.
  6. There are a total of 20 directories (folders) allowed on a disc. The file structure can be 0-4 directories deep (a folder within a folder, within a folder, etc). Anything more than 20 directories will be ignored. Each directory may have up to 99 files contained within it. Files not having the *.mp3 extension will not be played, but still count toward the maximum. Anything more than the first 99 files within a directory will be ignored. A single disc may have up to 254 files and directories. Anything beyond the 254 limit will be ignored.
  7. MP3 files must be written to a CD-R/RW in one of the following industry-standard formats: ISO 9660 Level 1 ISO 9660 Level 2 Joliet Romeo
  8. ID3 tag information is displayed by the radio, if available. The ID3 tag information can either be version 1 or 2. The radio will display the filename, song name, artist name, album name, directory name, and playlist name.

If the customer does not follow these guidelines when recording a CD-R/RW, the disc may not play in the US8 or US9 radio.