Entertainment Systems: Other Chevrolet Uplander I

Digital Video Disc (DVD) Player C1 (UMS)

Entertainment Connector End Views

Digital Video Disc (DVD) Player C1 (UMS)

Scheme 36

Entertainment Connector End Views

Digital Video Disc (DVD) Player C2 (UMS)

Mobile Entertainment Player Module (UMS)

Entertainment Connector End Views

Mobile Entertainment Player Module (UMS)

Scheme 37

Entertainment Connector End Views

Radio C1

Scheme 38

Entertainment Connector End Views

Radio C2

Scheme 39

Entertainment Connector End Views

Speaker - LF

Speaker - LR

Entertainment Connector End Views

Speaker - LR

Scheme 40

Entertainment Connector End Views

Speaker - Rear Tweeter - Left

Speaker - Rear Tweeter - Right

Entertainment Connector End Views

Speaker - Rear Tweeter - Right

Speaker - RF

Entertainment Connector End Views

Speaker - RF

Speaker - RR

Entertainment Connector End Views

Speaker - RR

Scheme 41

Entertainment Connector End Views

Steering Wheel Control Switch Assembly - Left (UK3)

Scheme 42

Entertainment Connector End Views

Steering Wheel Control Switch Assembly - Right (UK3)

Circuit/System Verification

If this DTC is retrieved as a current DTC, replace the module that set the DTC.

Repair Instructions

Control Module References for non-communicating module replacement, setup and programming.

Symptoms - Entertainment

1. Perform the «Diagnostic System Check - Vehicle»(ref-241670-S16610990062006081100000) , before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Radio/Audio System Description and Operation»(ref-241677-S42642380632006081100000) .

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.

Tools Required

J 39916-A CD and Cassette Diagnostic Audio Kit. See Special Tools .

Many conditions that affect radio operation may be corrected without removing the radio from the car. Verify the condition and follow the diagnostic procedures in order to isolate and correct the condition. In order to properly diagnose any audio system problems, ensure that you have a fully charged battery.

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 repeat the steps again with the engine running.
2. Return the ignition switch to the position that the concern was most noticeable.
3. Remove the 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 (50V) capacitor GM P/N 1227895-This works well for ignition system related noise. 0.47 micro farad capacitor GM P/N 1227894-This works well for switches and relays. Feed through capacitor GM P/N 477371-This works well for high current situations. Filter package GM P/N 1224205-This 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. Verify 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 System Check - Vehicle»(ref-241670-S16610990062006081100000) in Vehicle DTC Information.
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 that the two-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 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 43

Radio Poor Reception

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 components 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 Components. Test the ground for an open or high resistance. Refer to «Circuit Testing»(ref-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) 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 44

Rear Defogger Antenna System

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-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) 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-241677-S01130322022006081100000) 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

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-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) 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-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) 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-241677-S01130322022006081100000) 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

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 U56 or U42

Audio output signal circuit from DVD player open. Test left, right and common remote playback device signal circuits for opens, shorts to ground or shorts to battery positive.

With Radio or CD/MP3 Player

1. Audio output circuit to speaker open. Test affected speaker audio (+) and audio (-) circuits for an open. Refer to «Circuit Testing»(ref-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) in Wiring Systems.
2. Defective speaker. Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(ref-241677-S41658834132006081100000) .

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.

Reduced Volume - One or More Speakers

Radio/Audio System Schematic Reference: Radio/Audio System Schematics

Entertainment Connector End Views Reference: Entertainment Connector End Views

Speakers Inoperative - One or More

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Without RPO U56/U42 or U2K

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 affected speaker output circuits from the radio. If no shorts are located, replace the radio. Refer to «Control Module References»(ref-241672-S08014971642006081100000) in Computer/Integrating Systems for replacement, setup and programming.
2. Speaker output open. Test the appropriate speaker outputs for an open. Refer to «Circuit Testing»(ref-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) in Wiring Systems.
3. Defective speaker. Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(ref-241677-S41658834132006081100000) .

With RPO U56/U42 or U2K

1. Remote Playback Device Audio Circuit open, shorted to ground or shorted to battery positive. Test the appropriate remote playback device audio circuit for an open, short to ground or short to battery positive, Refer to «Circuit Testing»(ref-241671-S15536097382006081100000) and «Wiring Repairs»(ref-241671-S28487612812006081100000) in Wiring Systems.
2. Defective speaker. Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(ref-241677-S41658834132006081100000) .
3. 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 affected speaker output circuits from the radio. If no shorts are located, replace the radio. Refer to «Control Module References»(ref-241672-S08014971642006081100000) in Computer/Integrating Systems for replacement, setup and programming.

Speakers Inoperative - All

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Without RPO U2K or U42/U56

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 Control Module References in Computer/Integrating Systems for replacement, setup and programming.

With RPO U2K or U42/U56

No audio output from the DVD player or Digital Radio Receiver (DRR).

Test for any AC voltage between the left or right audio signal circuits and audio common circuit at the radio connector. If no AC voltage is present, check for opens, shorts to battery positive or shorts to ground on left and right output circuit from the affected component. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. If no shorts or opens are located, replace the affected component. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.

Video or Audio Distortion

The manufacturing process for producing DVD's does not have the same quality control processes in place that compact disk manufacturing does. If there are video or audio quality problems with an individual DVD, try playing that disk in another DVD player. If the quality is poor for both players, return the disk to the place of purchase and request an exchange. If the quality problem is only seen in one of the players, examine the disk for scratches dirt or smudges and attempt to clean the disk with one of the disk cleaning systems that are commercially available.

Video or audio distortion during auxiliary playback can often be attributed to the DC to AC inverter that is used to power the auxiliary device. The power inverters tend to introduce noisy signals into the vehicle electrical system.

Video Entertainment System Wireless Headphone Inoperative

1. Volume control on the wireless headphone set is turned all the way down. Adjust the volume control on the headphones.
2. Dead batteries in the wireless headphone set. Turn on power to the headphone set. If the headset indicator does not turn on, replace the batteries in the headset as needed.
3. Faulty headphone set. Test the operation of the system using a known good headphone set. If operation is OK, replace the vehicle headphone set.

Video Entertainment System Remote Control Inoperative

The buttons on the video remote control do not operate the video disc player but the buttons on the video disc player operate normally.

1. Dead batteries in the video remote control. Replace the dead batteries.
2. Faulty remote control. Test the operation of the system using a known good remote control. If operation is OK, replace the remote control.

Schematic Reference: Video System Schematics (w/o UMS) or Video System Schematics (UMS)

1. Remote battery drained-Install new batteries in the remote.
2. Overhead console faulty-Replace overhead console. Refer to «DVD Player Replacement»(ref-241677-S27075177632006081100000) .

Electrical Information Reference

1. «Circuit Testing»(ref-241671-S15536097382006081100000)
2. «Connector Repairs»(ref-241671-S30908621342006081100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-241671-S27410119602006081100000)
4. «Wiring Repairs»(ref-241671-S28487612812006081100000)

1. Ignition ON.
2. Turn the radio on. Select the mobile entertainment system as the source.
3. Play a movie on the mobile entertainment system.

1. «Mobile Entertainment Data Cartridge Access Lower Door Replacement»(ref-241677-S38444383392006081100000)
2. «DVD Player Replacement»(ref-241677-S27075177632006081100000)

1. «Circuit Testing»(ref-241671-S15536097382006081100000)
2. «Connector Repairs»(ref-241671-S30908621342006081100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-241671-S27410119602006081100000)
4. «Wiring Repairs»(ref-241671-S28487612812006081100000)

1. Ignition ON.
2. Turn the radio on. Select the mobile entertainment system as the source.
3. Play a selection on the mobile entertainment system.

1. «Mobile Entertainment Data Cartridge Access Lower Door Replacement»(ref-241677-S38444383392006081100000)
2. «DVD Player Replacement»(ref-241677-S27075177632006081100000)

1. «Circuit Testing»(ref-241671-S15536097382006081100000)
2. «Connector Repairs»(ref-241671-S30908621342006081100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-241671-S27410119602006081100000)
4. «Wiring Repairs»(ref-241671-S28487612812006081100000)

1. Ignition ON.
2. Turn the radio on. Select the mobile entertainment auxiliary system as the source.
3. Play a video source on the mobile entertainment auxiliary system.

1. «Mobile Entertainment Data Cartridge Access Lower Door Replacement»(ref-241677-S38444383392006081100000)
2. «DVD Player Replacement»(ref-241677-S27075177632006081100000)

1. «Circuit Testing»(ref-241671-S15536097382006081100000)
2. «Connector Repairs»(ref-241671-S30908621342006081100000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-241671-S27410119602006081100000)
4. «Wiring Repairs»(ref-241671-S28487612812006081100000)

1. Ignition ON.
2. Turn the radio on. Select an auxiliary mobile entertainment system as the source.
3. Play the auxiliary selection on the mobile entertainment system.

1. «Mobile Entertainment Data Cartridge Access Lower Door Replacement»(ref-241677-S38444383392006081100000)
2. «DVD Player Replacement»(ref-241677-S27075177632006081100000)

Radio Setup

Radio Theft Procedure

If the radio is replaced, perform a VIN Relearn, located in the Module Setup section on the scan tool. Cycle the ignition when complete.

Option Configuration

For option configuration select Module Setup under Radio and complete the setup procedure.

Digital Radio Receiver Setup

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

XM Activation

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.

Care of CDs

Handle CDs carefully. Store them in their original cases or other protective cases and away from direct sunlight and dust. The CD player scans the bottom surface of the disc. If the surface of a CD is damaged, such as cracked, broken, scratched or wrinkled labeling, the CD will not play properly or not at all. If the surface of a CD is soiled, take a soft, lint free cloth or dampen a clean, soft cloth in a mild, neutral detergent solution mixed with water and clean it. Make sure the wiping process starts from the center to the edge. Do not touch the bottom side of a CD while handling it. This could damage the surface. Pick up CDs by grasping the outer edges or the edge of the hole and the outer edge.

Care of the CD Player

The use of CD lens cleaners for CD players is not advised, due to the risk of contaminating the internal lens of the CD optics with lubricants.

Stuck CDs

Interrupting the battery power by pulling the fuse will sometimes release a stuck CD. If a CD is stuck and removed, inspect it for warps, cracks, etc. If the CD is damaged, do not replace the radio.

Labeling CDs

Paper labels can eventually warp and wrinkle and this will cause the disc to jam inside the CD player. Try labeling the top of the discs with a soft magic marker instead.

J 39916-A CD and Cassette Diagnostic Audio Kit. See Special Tools .

Care of the Cassette Tape Player

A tape player that is not cleaned regularly can cause reduced sound quality, ruined Cassettes or a damaged mechanism. Cassettes should be stored in their cases away from contaminates, direct sunlight and extreme heat. If they aren't they may not operate properly or may cause failure of the Cassette player. The Cassette player should be cleaned regularly after every 50 hours of use. The radio may display CLN or CLEAN to indicate that the Cassette player has been used more that 50 hours without the tape clean timer being reset. if this message appears on the display, the Cassette player needs to be cleaned. It will still play Cassettes, but it should be cleaned as soon as possible to prevent damage to the Cassettes and the player. If you notice a reduction in sound quality, try a known good Cassette to see if the Cassette or the player is at fault. If this other Cassette has no improvement in sound quality, clean the Cassette player. The recommended cleaning method for the Cassette player is the use of J 39916-A , a scrubbing action, non-abrasive cleaning cassette with pads which scrub the tape head as the hubs of the cleaner cassette turn. See Special Tools . When using a scrubbing action, non-abrasive cleaning cassette, it is normal for the cassette to eject because the unit is equipped with a cut tape detection feature and a cleaning cassette may appear as a broken tape. To prevent the cleaning cassette from being ejected, use the following steps

1. Turn the ignition to RUN or ACCESSORY.
2. Turn the radio OFF.
3. Press and hold the TAPE button for five seconds. CAS will flash on the display for 5 seconds.
4. Insert the J 39916-A scrubbing action cleaning cassette. See «Special Tools»(ref-241677-S02446655562006081100000) .
5. Eject the cassette after the manufacturers recommended cleaning time.

When the cleaning cassette has been ejected, the cut tape detection feature is active again.

After you clean the player, press and hold the cassette eject symbol or the EJT button for five seconds to reset the CLEAN or CLN indicator. The radio will display CLEANED or - - - to show the indicator was reset. Cassette are subject to wear and the sound quality may degrade over time. Always make sure the Cassette is in good condition before you service the player.

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.

Theft Deterrent

The "Theftlock" 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, a DTC will set, 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 table in this information to diagnose the "Theftlock" DTC for further information.

Steering Wheel Controls

Some audio functions are available using the steering wheel controls. The steering wheel controls are actually a resistor network which consists of multiple momentary contact switches and a series of resistors. The switches and resistor network is arranged so that each switch has a different resistance value. When a switch is pressed, a voltage drop occurs in the resistor network which produces a specific voltage value unique to the switch selected. These specific voltage values allow the radio to identify which switch has been pressed. The radio responds just as if the corresponding radio front panel button had been pressed.

The radio supplies voltage to the steering wheel control switch via the radio on signal circuit. The specific voltage signal from the switch is returned to the radio on the remote radio control signal circuit.

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.

XM Advisory Messages

Technical Information for MP3 Player (US8)

The US8 radio will play both standard audio CDs and CD-Rs. The CD-Rs may contain standard audio format (*.cda) or compressed audio in the *.mp3 format.

Customers who make their own music CD-Rs should be aware of the following

1. The files can be recorded on a CD-R disc with a maximum capacity of 700 MB.
2. The MP3 files must be recorded onto the disc in either a fixed bit rate (32 kbps, 40 kbps, 48 kbps, 56 kbps, 64 kbps, 80 kbps, 96 kbps, 112 kbps, 128 kbps, 160 kbps, 192 kbps, 224 kbps, 256 kbps and 320 kbps) or in a variable bit rate.
3. Discs recorded in either one session or in multiple sessions will play. Playlists, such as those created with popular MP3 software, are also supported.
4. ID3 tag information is available during playback, providing the information was recorded with ID3 tags, version 1 or version 2. CD text information is not available with the US8 radio.
5. The radio does not play mixed media CDs (those that contain files in both the *.mp3 and the *.cda format).
6. The radio will not play CD-Rs that contain formats of compressed audio other than *.mp3 (such as *.wma, *.asf or *.aac).
7. The radio will support a maximum of 50 folders, 50 playlists, 10 sessions and 255 files. If the information on the disc exceeds these numbers, anything over the maximum allowable will be ignored. Files that are not in the *.mp3 format will not play, but do count toward the maximum number of files.
8. The files or playlists can be arranged in folders, up to 11 layers deep (folders within folders, within folders, etc.). Anything more than 11 layers deep will be ignored.
9. Long names (on files, folders, playlists) or combination of large number of folders and files or playlists may cause player not to be able to read up to the max numbers of folders, playlists, files or sessions, due to memory limitations. Customers are encouraged to keep shorter names and minimize folder depth for ease of operation.

If these guidelines are not followed, a customer recorded CD may not play. Note that the radio has no ability to record *.mp3 files or any audio to a CD-R, it has only the ability to read information on a CD-R.

Overhead Console

The overhead console houses the digital versatile disc (DVD) player, controls for the rear seat audio (RSA), rear seat climate control, the flip-down display screen, auxiliary (AUX) input jacks, infrared (IR) transmitter for the optional wireless headphones, IR receiver for the wireless remote and two 2.5 mm wired headphone jacks.

Power is supplied from the RADIO AMP fuse in the fuse block - right instrument panel (I/P). The overhead console is grounded through G201. The overhead console is enabled/dissembled by class 2 messages from the body control module (BCM). The BCM also allows for retained accessory power, which allows the radio to operate for up to 10 minutes after the ignition is turned off. The overhead console can only be deactivated by one of the following

1. Front door is opened.
2. The 10 minute timer has elapsed.
3. Loss of state of health message from the BCM.

DVD Player

The DVD played is a single slot loading mechanism that will also play standard audio CDs in addition to DVD movies. Home-recorded CDs (CD-R) or home-recorded DVDs may not play properly in the player. The player can be turned on and used anytime the ignition is on or when retained accessory power (RAP) is enabled. The DVD player can be controlled either through the controls on the overhead console, the wireless infrared (IR) remote or the radio head if the DVD is selected as the source. If the rear seat audio (RSA) is in use, the DVD player cannot be controlled by the buttons on the overhead console.

To use the DVD player, press the DVD power button and pull the screen down. Insert a DVD (or audio CD) into the empty played slot. If a CD is inserted, it will automatically begin playing. If a DVD movie in inserted, it may begin to play or the user may have to select an option from an on screen menu to begin playback. While watching a movie or listening to an audio CD, the user may use the controls on the DVD player or remote to perform the following operations (not all functions are covered in the following table)

Video Entertainment System Description and Operation

If the front seat passengers have selected DVD as the source from the radio, the front seat passengers may also have control of the DVD player functions using the same controls as for in-dash CD player. See Radio/Audio System Description and Operation .

Display Screen

The display screen shows video from either DVD movies or an AUX input device, such as a video game console or camera. If an audio CD is played in the player, the screen may display artist/title/album information if available. The display screen will turn on when pulled down and automatically turn off when pushed up and closed.

AUX Inputs

The AUX input jacks are standard color-coded RCA-style jacks. Video is yellow, right audio is red and left audio is white. The jacks are located just forward of the screen. A number of devices may be plugged into the AUX jacks, including, but not limited to video game consoles, digital cameras, camcorders or other devices. Audio only sources can be played through the AUX jacks from portable audio devices.

To use the AUX input, turn the power on to the overhead console and push the AUX button. The display should show "AUX".

Parental Control

The overhead console is equipped with a parental control button. It is located forward of the AUX input jacks. When pressed it will stop playback of any source currently playing through the overhead console. A DVD or audio CD is paused and the screen is blanked. When pressed again to cancel parental control, operation returns to normal.

Rear Seat Audio (RSA)

Passengers riding in the rear seating rows of the vehicle may utilize the rear seat audio (RSA) system to listen to an audio source that is different from what is being listened to in the front seat. To use the RSA system, press the RSA power button, located on the overhead console. Users can change the RSA source to either the radio or the in-dash CD/MP3 player by using the SRCE (source) button. If the front seat passengers are listening to the same source, only front seat passengers will have the ability to control or change radio tuning or CD track and/or disc selections.

If RSA source is radio, users may perform the following operations

Video Entertainment System Description and Operation

If RSA source is single CD player (US8 radio) or 6 disc in-dash CD changer (US9 radio), users may perform the following operations

Video Entertainment System Description and Operation

Wireless Headphones

Wireless headphones are optional and allow for rear seat passengers to use the rear seat entertainment (RSE) or rear seat audio (RSA) functions without disturbing the listening of front seat passengers. The wireless headphones receive audio signals from the infrared (IR) transmitter on the overhead console. This transmission is line of sight only, so audio quality will be degraded if anything blocks the transmitter signal from reaching the headphones.

The wireless headphones include 2 channels. This allows rear seat passengers to utilize both RSE and RSA functions without disturbing one another. The toggle switch on the right side headphone earpiece switches between channel one and channel 2. RSE is broadcast on channel one and RSA on channel 2.

To use wireless headphones, turn them on using the power button on the left side headphone earpiece. Adjust volume using the rotary dial on the right side headphone earpiece.

Wired Headphone Jacks

The overhead console is equipped with two 2.5 mm jacks for wired headphones. The headphones can be used to listen to either the RSE or RSA functions. If both RSE and RSA are used at the same time, the wired headphones receive only RSA audio.

To use the wired headphones, plug the headphones into the jacks. Adjust the volume by pressing the headphone button on the left or right side of the DVD player face and then using the FWD or REV buttons to adjust the volume up or down. Visual indicators on the DVD player display will indicate volume level. The left headphone button selects the left headphone jack for adjustment and the right headphone button selects the right headphone for volume adjustment.

Playback File Types

Mobile Entertainment Data System supports the following audio file types

1. mp3 (.mp3)
2. wav (.wav)
3. FLAC (.flac)
4. audible (.aa)
5. ogg Vorbis (.ogg)

Mobile Entertainment Data System supports the following video file types

1. MPEG1
2. MPEG2
3. DivX3.11
4. DivX4
5. DivX5
6. XVID

Mobile Entertainment Data System supports video game emulation. A list of authorized games shall be made known to the user.

Mobile Entertainment Data System software can upgraded to support new audio and video file formats as these appear in the future, so long as they are compatible with the existing hardware.

File Errors

The Mobile Entertainment Data System may attempt to playback a file that appears to be one of the supported formats listed above, but encounter errors in the file; these errors include file corruption, disk/file system corruption or incorrect file encoding. The system will attempt to skip or mask these runtime errors or inform the user of the possible error. Since the multimedia files may come from uncontrolled sources, the playback performance cannot be guaranteed.

Removable Cartridge

The removable cartridge stores audio and video content that can be played back by the overhead console assembly. The removable cartridge has a capacity of 40 GB. This should allow for storage of approximately 40 typical movies in Mpeg format or 10,000 songs, in typical MP3 format or any combination of the two. In addition, the removable cartridge contains the in-vehicle operating software. When loaded into the overhead console assembly, the cartridge shall download the operating software to the in-vehicle playback electronics. This allows for an automatic update to the in-vehicle operating software. Updated operating software shall be loaded onto the removable cartridge, from a suitable in-home computer, through the in-home cradle, with minimal customer intervention.

In-Home Cradle and USB data cable

The in-home cradle facilitates the transfer of digital files between a suitable in-home computer and the removable cartridge. Data transfer from the in-home computer to the removable cartridge will be accomplished via USB cable and will require a minimum in-home computer configuration that can run Windows 98 software or higher and support the USB data protocol.

In-Home Power Supply

The in-home power supply interfaces between the in-home cradle and a regular power outlet to supply power to the cradle.

In-Home Software

The in-home software allows for loading audio content, video content and updated operating software onto the removable cartridge, with minimal customer intervention.

In-Vehicle Software

The in-vehicle software is downloaded from the removable cartridge to the overhead console assembly whenever the cartridge is inserted. The in-vehicle software shall perform all functions required to play back audio and video content on the cartridge and shall perform all control functions to interface with the other vehicle infotainment components.

The in-vehicle software may communicate information about the audio content being played back to the radio and Disk Player and Video Display with the purpose of displaying that information on the radio or rear seat entertainment System displays.

Control of the Mobile Entertainment Data System audio content can be achieved by the driver using the voice browsing interface. The voice browsing interface uses a text-to-speech routine to translate the information about the audio files into speech delivered to the vehicle occupants through the speakers. The voice browsing interface allows the occupants to browse audio content by artist, album or genre. In addition, the voice browsing interface is able to inform the occupants of the title of the audio track being played. Commands from the driver are sent to the Mobile Entertainment Data System from the radio faceplate buttons or from the equivalent steering wheel buttons. Preset buttons shall be used to select the category of browsing. Up/Down and Seek buttons shall be used to browse within a given browsing category.

Control of the Mobile Entertainment Data System audio, video and video game content can be achieved by the rear seat passengers through a graphical user interface displayed on the Disk Player and Video Display

Because of delayed response, the Disk Player and Video Display remote control can not be used to play the video game portion of the GMT201 Mobile Digital Media.