Entertainment System Cadillac CTS I

Fastener Tightening Specifications

Fastener Tightening Specifications

Entertainment Schematic Icons

Entertainment Schematic Icons Icon Icon Definition CAUTION: This vehicle is equipped with a Supplemental Inflatable Restraint (SIR) System. Failure to follow the correct procedure could cause the following conditions: Air bag deployment Personal injury Unnecessary SIR system repairs In order to avoid the above conditions, observe the following guidelines: Refer to SIR Component Views in order to determine if you are performing service on or near the SIR components or the SIR wiring. If you are performing service on or near the SIR components or the SIR wiring, disable the SIR system. Refer to Disabling the SIR System in SIR. IMPORTANT: Twisted-pair wires provide an effective "shield" that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 9 turns per 31 cm (12 in) as measured anywhere along the length of the wires. The outside diameter of the twisted wires must not exceed 6.0 mm (0.2 in)

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Entertainment Connector End Views

Audio Amplifier C1 (U66) Connector Part Information 12064749 2-Way F Metri-Pack 480 Series (BK) Pin Wire Color Circuit No. Function A BK/WH 851 Ground B RD/BK 1242 Battery Positive Voltage

Audio Amplifier C2 (U66) Connector Part Information 12084945 16-Way F Micro-Pack 100 Series (GY) Pin Wire Color Circuit No. Function A1-A2 - - Not Used A3 D-GN 1953 Right Front Midrange Speaker Output (-) A4 OG 1853 Right Front Midrange Speaker Output (+) A5 OG 1955 Right Rear Midrange Speaker Output (-) A6 TN 1855 Right Rear Midrange Speaker Output (+) A7 WH 1959 Left Rear Midrange Speaker Output (-) A8 TN 1859 Left Rear Midrange Speaker Output (+) B1 D-BU 658 Cellular Telephone Voice Signal (UE1) B2 L-BU/BK 659 Cellular Telephone Voice Low Reference (UE1) B3-B8 - - Not Used

Audio Amplifier C3 (U66) Connector Part Information 12110206 24-Way F Micro-Pack 100 Series (L-BU) Pin Wire Color Circuit No. Function A1 PU 1952 Right Front Tweeter Speaker Output (-) A2 L-GN 1852 Right Front Tweeter Speaker Output (+) A3 TN 1856 Left Front Tweeter Speaker Output (+) A4 YE 1956 Left Front Tweeter Speaker Output (-) A5 D-BU 1857 Left Front Midrange Speaker Output (+) A6 L-BU 1957 Left Front Midrange Speaker Output (-) A7 D-BU/WH 346 Rear Subwoofer Speaker Coil 1 Output (+) A8 L-GN/BK 1794 Rear Subwoofer Speaker Coil 1 Output (-) A9 D-GN 1795 Rear Subwoofer Speaker Coil 2 Output (+) A10 L-BU/BK 315 Rear Subwoofer Speaker Coil 2 Output (-) A11-A12 - - Not Used B1-B3 - - Not Used B4 L-GN 1948 Right Low Level Audio Signal (-) B5 L-GN 512 Right Low Level Audio Signal (+) B6 D-GN 1947 Left Low Level Audio Signal (-) B7 TN 511 Left Low Level Audio Signal (+) B8-B10 - - Not Used B11 PU 1807 Class 2 Serial Data B12 - - Not Used

Audio Amplifier C1 (U57) Connector Part Information 12110626 8-Way F Metri-Pack 280 Series, Flexlock (GY) Pin Wire Color Circuit No. Function A BK/WH 851 Ground B D-BU/WH 346 Rear Subwoofer Speaker Output (+) C-F - - Not Used G L-GN/BK 1794 Rear Subwoofer Speaker Output (-) H RD/BK 1242 Battery Positive Voltage

Audio Amplifier C2 (U57) Connector Part Information 12110206 24-Way F Micro-Pack 100 Series (L-BU) Pin Wire Color Circuit No. Function A1 - - Not Used A2 WH 1959 Left Rear Midrange Speaker Output (-) A3 TN 1859 Left Rear Midrange Speaker Output (+) A4 TN 1856 Left Front Tweeter Speaker Output (+) A5 YE 1956 Left Front Tweeter Speaker Output (-) A6 L-BU 1960 Front Center Speaker Output (-) A7 YE 1860 Front Center Speaker Output (+) A8 PU 1952 Right Front Tweeter Speaker Output (-) A9 L-GN 1852 Right Front Tweeter Speaker Output (+) A10 TN 1855 Right Rear Midrange Speaker Output (+) A11 OR 1955 Right Rear Midrange Speaker Output (-) A12 L-BU/BK 659 Cellular Telephone Voice Low Reference (UE1) B1-B7 - - Not Used B8 L-GN 1948 Right Low Level Audio Signal (-) B9 D-GN 1947 Left Low Level Audio Signal (-) B10 TN 511 Left Low Level Audio Signal (+) B11 L-GN 512 Right Low Level Audio Signal (+) B12 D-BU 658 Cellular Telephone Voice Signal (UE1)

Audio Amplifier C3 (U57) Connector Part Information 12064993 6-Way F Micro-Pack 100 Series (BK) Pin Wire Color Circuit No. Function 5 - - Not Used 6 PU 1807 Class 2 Serial Data 7 BARE 1489 Drain Wire 8 D-GN 1488 Noise Compensation Microphone Supply Voltage 9 WH 5343 Navigation Audio Signal (-) (UAV/U2X/U2Y) 10 YE 5342 Navigation Audio Signal (+) (UAV/U2X/U2Y)

Digital Radio Receiver (U2K/U2L) Connector Part Information 15394150 16-Way F Micro 64 (BK) Pin Wire Color Circuit No. Function 1 - - Not Used 2 D-GN/WH 368 Right Audio Signal (+) 3 BN/WH 367 Left Audio Signal (+) 4-8 - - Not Used 9 BK 850 Ground 10 TN/WH 372 Audio Common 11-14 - - Not USed 15 PU 1807 Class 2 Serial Data 16 RD/WH 2240 Battery Positive Voltage

Noise Compensation Microphone (U57) Connector Part Information 12047663 2-Way M Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A BARE 1489 Drain Wire B D-GN 1488 Noise Compensation Microphone Supply Voltage

Radio C1 Connector Part Information 30220700 20-Way F DCS-2 Tri-Color (YE/GN/BU) Pin Wire Color Circuit No. Function 1 - - Not Used 2 BARE 5344 Drain Wire (UAV/U2X/U2Y) 3 - - Not Used 4 YE 5342 Navigation Audio Signal (+) (UAV/U2X/U2Y) 5 OG 1544 Information Up Switch Signal (LY9/LA3/LY7) 6 PK 5149 Cellular Microphone Signal (UAV) GY 655 Cellular Microphone Signal (U2Y/U2X) 7 - - Not Used 8 PU 1807 Class 2 Serial Data 9 PK/BK 5152 Cellular Microphone Low Reference (UAV) BARE 1782 Drain Wire (U2Y/U2X) 10 - - Not Used 11 PU 1807 Class 2 Serial Data 12 PK 1545 Information Down Switch Signal (LY9/LA3/LY7) 13 D-BU 1796 Steering Wheel Controls Signal (LY9/LA3/LY7) 14 D-GN 5142 Modem Tx (UAV) 15 - - Not Used 16 WH 5343 Navigation Audio Signal (-) (UAV/U2X/U2Y) 17 L-BU 5141 Modem Rx (UAV) 18 - - Not Used 19 OG 1486 FM Composite Signal 20 YE/BK 5143 Modem Ground (UAV) (Not Used)

Radio C2 Connector Part Information 963121-1 8-Way F Junior Timer Type (TN) Pin Wire Color Circuit No. Function 1 - - Not Used 2 BARE 2012 Drain Wire 3 L-GN 512 Right Low Level Audio Signal (+) 4 L-GN 1948 Right Low Level Audio Signal (-) 5 TN 511 Left Low Level Audio Signal (+) 6 D-GN 1947 Left Low Level Audio Signal (-) 7 BN 818 Vehicle Speed Signal (UAV/U2X/U2Y) 8 BARE 2011 Drain Wire

Radio C3 Connector Part Information 963120-1 8-Way F Junior Timer Type (GY) Pin Wire Color Circuit No. Function 1 D-GN/WH 368 Right Audio Signal (+) (U2K/U2L) 2 PU 1375 Remote Radio Control Supply Voltage (LY9/LA3/LY7) 3 TN/WH 372 Audio Common (U2K/U2L) 4 BN/WH 367 Left Audio Signal (+) (U2K/U2L) 5 PK 5165 SW Antenna Enable (Export w/U2X) 6 BARE 5324 Drain Wire (U2K/U2L) 7 RD/WH 2240 Battery Positive Voltage 8 BK/WH 851 Ground

Radio C4 (Export w/U2X/U2Y) Connector Part Information 39-01-2295 22-Way F Mini-Fit Jr. (WH) Pin Wire Color Circuit No. Function 1-5 - - Not Used 6 OR 2047 Video Red Signal (+) 7 TN 5146 Video Red Signal (-) 8 D-BU 2048 Video Green Signal (+) 9 BN 5145 Video Green Signal (-) 10 D-GN 2049 Video Blue Signal (+) 11 GY 5144 Video Blue Signal (-) 12-14 - - Not Used 15 BN 2355 Navigation Display Serial Data Low (Japan w/U2X) 16 OG 2354 Navigation Display Serial Data High (Japan w/U2X) 17-19 - - Not Used 20 L-GN 2045 Video Synchronization Signal (+) 21 TN/BK 5147 Video Synchronization Signal (-) 22 - - Not Used

Radio Antenna Module Connector Part Information 12186246 3-Way F Micro-Pack (WH) Pin Wire Color Circuit No. Function 1 RD/WH 3640 Battery Positive Voltage 2 OG 1486 FM Composite Signal 3 PU 1807 Class 2 Serial Data

Speaker - Front Center (U57) Connector Part Information 12047662 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A L-BU 1960 Front Center Speaker Output (-) B YE 1860 Front Center Speaker Output (+)

Speaker - Left A Pillar Tweeter (U57) Connector Part Information 12047662 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A YE 1956 Left Front Tweeter Speaker Output (-) B TN 1856 Left Front Tweeter Speaker Output (+)

Speaker - Left A Pillar Tweeter (U66) Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A YE 1956 Left Front Tweeter Speaker Output (-) B TN 1856 Left Front Tweeter Speaker Output (+)

Speaker - Right A Pillar Tweeter (U57) Connector Part Information 12047662 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A PU 1952 Right Front Tweeter Speaker Output (-) B L-GN 1852 Right Front Tweeter Speaker Output (+)

Speaker - Right A Pillar Tweeter (U66) Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A PU 1952 Right Front Tweeter Speaker Output (-) B L-GN 1852 Right Front Tweeter Speaker Output (+)

Speaker - LF Door (U57) Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A YE 1956 Left Front Tweeter Speaker Output (+) B TN 1856 Left Front Tweeter Speaker Output (+)

Speaker - LF Door (U66) Connector Part Information 12064867 2-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A L-BU 1957 Left Front Midrange Speaker Output (-) B D-BU 1857 Left Front Midrange Speaker Output (+)

Speaker - RF Door (U57) Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A PU 1952 Right Front Tweeter Speaker Output (-) B L-GN 1852 Right Front Tweeter Speaker Output (+)

Speaker - RF Door (U66) Connector Part Information 12064867 2-Way F Metri-Pack 150 Series (WH) Pin Wire Color Circuit No. Function A D-GN 1953 Right Front Midrange Speaker Output (-) B OG 1853 Right Front Midrange Speaker Output (+)

Speaker - LR Door Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A WH 1959 Left Rear Midrange Speaker Output (-) B TN 1859 Left Rear Midrange Speaker Output (+)

Speaker - RR Door Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A OG 1955 Right Rear Midrange Speaker Output (-) B TN 1855 Right Rear Midrange Speaker Output (+)

Speaker - Rear Subwoofer (U57) Connector Part Information 12129136 4-Way F Metri-Pack 280 Series Flexlock (BK) Pin Wire Color Circuit No. Function A D-BU/WH 346 Rear Subwoofer Speaker Output (+) B L-GN/BK 1794 Rear Subwoofer Speaker Output (-) C-D - - Not Used

Speaker - Rear Subwoofer (U66) Connector Part Information 12064760 4-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit No. Function A L-GN/BK 1794 Rear Subwoofer Speaker Coil 1 Output (-) B D-BU/WH 346 Rear Subwoofer Speaker Coil 1 Output (+) C L-BU/BK 315 Rear Subwoofer Speaker Coil 2 Output (-) D D-GN 1795 Rear Subwoofer Speaker Coil 2 Output (+)

Steering Wheel Controls - Left (LY9/LA3/LY7) Connector Part Information 50-57-9404 4-Way F Molex (BK) Pin Wire Color Circuit No. Function 1 D-BU 1375 Remote Radio Control Supply Voltage 2 D-BU 1796 Steering Wheel Controls Signal 3 YE 1491 Backlight Lamps Control 4 BK 350 Ground

Steering Wheel Controls - Left (LS6) Connector Part Information 50-57-9404 4-Way F Molex (BK) Pin Wire Color Circuit No. Function 1 BK 351 Ground 2 BK 350 Ground 3 YE 1491 Backlight Lamps Control 4 D-BU 5201 Steering Wheel Controls Signal

Steering Wheel Controls - Right (LY9/LA3/LY7) Connector Part Information 50-57-9407 7-Way F Molex (BK) Pin Wire Color Circuit No. Function 1 YE 1491 Backlight Lamps Control 2 BK 350 Ground 3 OG 1544 Information Up Switch Signal 4 PK 1545 Information Down Switch Signal 5 PU 1375 Remote Radio Control Supply Voltage 6 D-BU 1375 Remote Radio Control Supply Voltage 7 D-BU 1796 Steering Wheel Controls Signal

Steering Wheel Controls - Right (LS6) Connector Part Information 50-57-9407 7-Way F Molex (BK) Pin Wire Color Circuit No. Function 1 PK 339 Ignition 1 Voltage 2 GY/WH 87 Cruise Control Resume/Accel Switch Signal 3 D-BU 84 Cruise Control Set/Coast Switch Signal 4 GY 397 Cruise Control On Switch Signal 5 BK 350 Ground 6 YE 1491 Backlight Lamps Control 7 - - Not Used

Diagnostic Starting Point - Entertainment

Begin the system diagnosis with the Diagnostic System Check - Radio/Audio System . The Radio/Audio System Diagnostic System Check will provide the following information

1. The identification of the control module(s) which command the system.
2. The ability of the control module(s) to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Radio/Audio System Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
2. 4: The symptom list in Symptoms will determine the correct diagnostic procedure to use.
3. 5: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Diagnostic System Check - Radio/Audio System

Scan Tool Output Controls

Bose Amplifier Scan Tool Output Control

Delco Amplifier Scan Tool Output Control

Radio Scan Tool Output Control

Scan Tool Data List

Radio

Bose Amplifier

Delco Amplifier

Digital Radio Receiver

Diagnostic Trouble Code (DTC) List

Diagnostic Trouble Code (DTC) List

Circuit Description

This DTC is generated by the module when an error occurs between the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory. The only circuit required is the class 2 communications line.

Conditions for Running the DTC

The DTC is run when the Radio changes from OFF to ON. This may be in response to the radio switch or the ignition ON signal.

Conditions for Setting the DTC

This DTC is generated by the module when an error occurs between the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory. This happens when the radio changes from OFF to ON.

Action Taken When the DTC Sets

The radio does not function. The radio also displays as many characters of the word "CALIBRATE" as will fit in the radio display.

Conditions for Clearing the MIL/DTC

Re-calibration with the correct calibrations for the vehicle and cycling the radio to OFF then to ON will clear the DTC if there is no damage to the radio.

DTC B1001

The digital radio antenna is connected to the digital radio receiver by 2 coax cables. One coax carries the satellite signal, the other coax carries the terrestrial signal. The antenna cable for the satellite antenna also provides a path for D C current for powering the antenna.

This test is run every 300 milliseconds.

The digital radio receiver detects an antenna fault.

The radio displays "No XM Signal."

Conditions for Clearing the DTC

The condition must be corrected.

The number below refers to the step number on the diagnostic table.

1. 2: Early design modules support the mV reading while later design modules support the mA reading.
2. 3: Due to current limiting capabilities in the module, an antenna cable shorted to ground could still show 1200-1800 mV.

DTC B1259

This DTC is generated by the module when the Theft Lock is activated. This occurs when the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory do not match. This also occurs when no VIN is received over the class 2 circuit. The only circuit required is the class 2 communications line.

This test is run every 300 milliseconds.

This DTC is generated by the module when the VIN as received over the class 2 communication circuit and the VIN as stored in the module memory do not match. This also occurs if no VIN is received over the class 2 circuit. This DTC test runs when the Radio changes from OFF to ON.

The Radio does not function. The Radio will display Locked - THEFTLOCK Active.

Re-calibration with the correct calibrations for the vehicle and cycling the Radio to OFF then to ON will clear the DTC if there is no damage to the Radio.

DTC B1271

DTC B1422 will set if the voltage to the 8 volt ARS power supply falls below 8.3 volts.

This test is run every 300 milliseconds.

The antenna module detects that the voltage has dropped below 8.3 volts for 80 msec.

The DTC is cleared when the antenna module detects that the voltage is back above 8.8 volts.

DTC B1422

Symptoms - Entertainment

1. Perform the «Diagnostic System Check - Radio/Audio System»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) 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»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__radioaudio-system-description-and-operation) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the radio. Refer to «Checking Aftermarket Accessories»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

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.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Audio System Troubleshooting Hints»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system)
2. «Radio Poor Reception (w/o RPO UJ6)»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__radio-poor-reception-wo-rpo-uj6) or «Radio Poor Reception (with RPO UJ6)»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__radio-poor-reception-with-rpo-uj6)
3. «Digital Radio Poor or No Reception»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__digital-radio-poor-or-no-reception)
4. «Noise Compensated Volume Inoperative»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__noise-compensated-volume-inoperative)
5. «Steering Wheel Controls Inoperative (2.6L, 3.2L 3.6L (LY9, LA3, LY7))»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__steering-wheel-controls-inoperative-26l-32l) or «Steering Wheel Controls Inoperative (5.7L (LS6))»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__steering-wheel-controls-inoperative-57l-ls6)
6. «Reduced Volume - One or More Speakers»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__reduced-volume-one-or-more)
7. «Speakers Inoperative - One or More»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speakers-inoperative-one-or-more)
8. «Speakers Inoperative - All»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speakers-inoperative-all)

For navigation related symptoms, refer to Symptoms - Navigation Systems in Navigation Systems.

Tools Required

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

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.

Preliminary Inspections

1. Check for any aftermarket equipment that may have been installed on the vehicle. If aftermarket equipment is found disconnect it and check if the audio noise is still present. Inspect that the antenna connector and the antenna coaxial cable are clean and tight.
2. For reception concerns, first determine if the customer is within the listening area of the stations they are attempting to receive.
3. Stations at the lower end of the FM band are more susceptible to audio noises than stations at the higher end.
4. If the noise is only from one speaker check for the following before speaker replacement: Isolate the noise using the J 39916-A . See «Special Tools and Equipment»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) . Inspect the speaker connections to ensure they are clean and tight. Refer to «Testing for Intermittent Conditions and Poor Connections»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor) in Wiring Systems. Inspect for a loose or incorrectly installed speaker or surrounding trim. Loose trim can cause a buzz or flutter which sounds like a malfunctioning speaker.
5. Ignition noise on the FM band may be an indication of an ignition system problem.
6. Inspect that all vehicle grounds are clean, tight and free of corrosion.
7. Inspect the rear defogger grid lines for large breaks or dark spots.
8. Inspect the connections at the radio antenna module (if equipped) to ensure that they are clean and tight.
9. Compare the customers vehicle to another of similar model and audio system to determine if the condition is abnormal.

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 88-108 FM then 550-1600 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. Attempt variations of the following repairs: Add 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 477371- 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 53.34 cm (21 in) braided ground strap GM P/N 8910791 48.26 cm (19 in) braided ground strap GM P/N 6286800 26.67 cm (10.5 in) braided ground strap GM P/N 6287160 21.59 cm (8.5 in) 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.
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 all of the vehicle systems (including those not related to the audio system) for proper operation and function.

Radio Poor Reception (w/o RPO UJ6)

Radio Poor Reception (w/o RPO UJ6)

Radio Poor Reception (with RPO UJ6)

Radio Poor Reception (with RPO UJ6)

Digital Radio Poor or No Reception

Digital Radio Poor or No Reception

Noise Compensated Volume Inoperative

Noise Compensated Volume Inoperative

Steering Wheel Controls Inoperative (2.6L, 3.2L 3.6L (LY9, LA3, LY7))

Steering Wheel Controls Inoperative (2.6L, 3.2L 3.6L (LY9, LA3, LY7))

Steering Wheel Controls Inoperative (5.7L (LS6))

Steering Wheel Controls Inoperative (5.7L (LS6))

Reduced Volume - One or More Speakers

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Always perform the Entertainment System Diagnostic System Check before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Radio/Audio System .

Speaker(s) - Reduced Volume

RPO U66

1. Speaker output circuit high resistance. Test the appropriate speaker output circuits for high resistance. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. Low level audio circuit open. Test the appropriate low level audio circuit for an open. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
3. Defective speaker - Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speaker-replacement-reference) .

RPO U57

1. Speaker output circuit high resistance, open, or shorted. Test the appropriate speaker output circuits for high resistance, open or short. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. Defective speaker - Replace the appropriate speaker. Refer to «Speaker Replacement Reference»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speaker-replacement-reference) .

With RPO U2K

1. Audio common circuit open. Test the audio common circuit for an open. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the digital radio receiver. Replace the digital radio receiver. Refer to «Receiver Replacement - Digital Radio»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) and «Digital Radio Receiver Setup»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__digital-radio-receiver-setup) .
3. No digital radio audio output from the radio. Replace the radio. Refer to «Radio Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

Speakers Inoperative - One or More

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Always perform the Entertainment System Diagnostic System Check before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Radio/Audio System .

One Speaker Inoperative

1. Speaker output open or shorted. Test the appropriate speaker output circuits for an open or short. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the amplifier. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. Refer to «Speaker Replacement Reference»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speaker-replacement-reference) . If no AC voltage is present, replace the amplifier. Refer to «Amplifier Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .
3. Defective speaker. Replace the inoperative speaker. Refer to «Speaker Replacement Reference»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__speaker-replacement-reference) .

All Speakers on One Channel Inoperative

RPO U66

1. Low level audio signal circuit open or shorted. Test all low level audio signal circuits for an open or short. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the amplifier. Replace the amplifier. Refer to «Amplifier Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

RPO U57

1. Rear midrange speaker output shorted. Test all rear midrange speaker output circuits for a short. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the amplifier. Replace the amplifier. Refer to «Amplifier Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

With RPO U2K

1. Remote radio audio signal circuit open. Test the appropriate remote radio audio signal circuit for an open. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the digital radio receiver. Replace the digital radio receiver. Refer to «Receiver Replacement - Digital Radio»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) and «Digital Radio Receiver Setup»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__digital-radio-receiver-setup) .
3. No digital radio audio output from the radio. Replace the radio. Refer to «Radio Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

Speakers Inoperative - All

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Always perform the Entertainment System Diagnostic System Check before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Radio/Audio System .

All Speakers Inoperative

All Radios

1. Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. Ground circuit to the amplifier open. Test the ground circuit to the amplifier for an open. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
3. No audio output from the amplifier. Replace the amplifier. Refer to «Amplifier Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

With RPO U2K

1. Audio signal circuit shorted. Test the audio signal circuits for a short. Refer to «Circuit Testing»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__circuit-testing) and «Wiring Repairs»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__wiring-repairs) in Wiring Systems.
2. No audio output from the digital radio receiver. Replace the digital radio receiver. Refer to «Receiver Replacement - Digital Radio»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) and «Digital Radio Receiver Setup»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__digital-radio-receiver-setup) .
3. No digital radio audio output from the radio. Replace the radio. Refer to «Radio Replacement»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system) .

Radio Setup

Radio Theft Procedure

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

Option Configuration

For option configuration select Special Functions 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.

Speaker Replacement Reference

Speaker Replacement Reference

Scheme 29

1. Remove the center I/P air vents. Refer to «Deflector Replacement - Instrument Panel Air - Center»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in HVAC.
2. Remove the HVAC programer/ashtray assembly. Refer to «HVAC Control Module Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#hvac-systems-automatic) in HVAC Systems - Automatic.
3. Remove the 4 10 mm screws securing the radio to the I/P retainer.
4. Pull out the radio assembly.
5. Disconnect the electrical connectors.
6. Remove the radio from the vehicle.

Installation Procedure

Note. Refer to Fastener Notice in Cautions and Notices.

1. Connect the electrical connectors.
2. Install the radio assembly to the I/P retainer. Tighten: Tighten the screws to 9 N.m (80 lb in).
3. Install the HVAC programer/ashtray assembly. Refer to «HVAC Control Module Replacement»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#hvac-systems-automatic) in HVAC Systems - Automatic.
4. Install the center I/P air vents. Refer to «Deflector Replacement - Instrument Panel Air - Center»(/cadillac/cts/i-2002-2007/remont/automatic-hvac-system/#heating-ventilation-and-air-conditioning) in HVAC.
5. Reprogram the radio. Refer to «Radio Setup»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__radio-setup) in Body and Accessories-Entertainment.

Removal Procedure

Scheme 30

1. Remove the rear self panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim
2. Disconnect the electrical connectors on the receiver.
3. Remove the fasteners securing the receiver to the rear shelf carrier.
4. Remove the receiver.

1. Install the receiver to the rear carrier.
2. Install the fasteners securing the receiver to the rear carrier. Tighten: Tighten the fasteners to 2 N.m (17 lb in).
3. Connect the electrical connectors.
4. Install the rear self panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Perform the setup procedure for the digital radio receiver. Refer to «Digital Radio Receiver Setup»(/cadillac/cts/i-2002-2007/remont/entertainment-systems/#entertainment-system__digital-radio-receiver-setup) .

Scheme 31

1. Remove the rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.
2. Remove the nuts securing the amplifier to the vehicle.
3. Disconnect the electrical connectors.
4. Remove the amplifier from the vehicle.

1. Connect the electrical connectors.
2. Install the amplifier to the studs on the wheel house. NOTE: Refer to Fastener Notice in Cautions and Notices.
3. Install the nuts securing the amplifier the vehicle. Tighten: Tighten the nuts to 9 N.m (80 lb in).
4. Reinstall the rear compartment trim. Refer to «Compartment Trim Panel Replacement - Rear»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-rear-end) in Body Rear End.

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

If you do not regularly clean the tape player, the tape player is subject to the following conditions

1. Reduced sound quality
2. Ruined cassettes
3. A damaged tape mechanism

Cassette tapes may not operate properly if they are not stored in their cases away from the following conditions

1. Contaminants
2. Direct sunlight
3. Extreme heat

Cleaning Intervals

Clean the cassette tape player after every 15 hours of operation for optimum performance.

Clean the cassette tape player at a maximum of every 50 hours of playing time. This will prevent damage to the cassette tape player mechanism. The radio may display CLN, CLEAN, or CLEAN TAPE (depending on the type of radio being used), if equipped with the clean tape indicator feature. This indicates that you have used the tape player for 50 hours without resetting the tape clean timer. If this message appears on the display, clean the cassette tape player. The player can still play tapes but the player should be cleaned as soon as possible in order to prevent damage to the tapes and/or the player.

Cassettes are subject to wear and the sound quality may degrade over time. If you notice a reduction in sound quality, play a different cassette. A new cassette may indicate whether the tape or the tape player is at fault.

If the sound quality does not improve when the second tape is played, clean the cassette player. Perform this step regardless of when you last cleaned the cassette player.

If a noticeable improvement is not achieved after cleaning the player, remove the radio assembly for repair.

Head and Capstan Cleaning

The following 2 components are cleaned on a cassette player

1. The head
2. The capstan

In order to properly clean a tape player, use the cleaning cassette in J 39916-A in order to clean the head and the capstan. See Special Tools and Equipment . The cleaning cassette is a scrubbing action, non-abrasive cassette with pads which scrub the tape head as the hubs of the cleaner cassette turn. When using a scrubbing action, non-abrasive cleaning, the cassette may eject. The unit is equipped with a cut tape detection feature. The feature than may detected as a broken tape.

In order to prevent the cleaning cassette from being ejected, perform the following steps

1. Turn the ignition switch to one of the following positions (depending upon the vehicle): ON RUN ACC ACCESSORY
2. Turn OFF the radio.
3. Press and hold the TAPE button for 5 seconds. The tape symbol on the display will flash for 2 seconds.
4. Insert the scrubbing action cleaning cassette.
5. Eject the cleaning cassette after the manufacturer's recommended cleaning time. When the cleaning cassette has been ejected, the cut tape detection feature is active again.

The alternative method is to use a non-scrubbing action, wet type cleaning cassette. This cassette uses a fabric belt to clean the tape head. This type of cleaning cassette does not eject on its own. A non-scrubbing action cassette may not clean as thoroughly as the scrubbing type cleaning cassette. The use of this cassette is not recommended.

After you clean the player, press and hold the EJECT button for 5 seconds to reset the CLEAN indicator. The radio display shows that the indicator has been reset.

Scheme 32

Scheme 33

1. Pull down the overhead console to release the retainers securing it to the headliner.
2. Lower the overhead console.
3. Disconnect the microphone electrical connector.
4. Remove the microphone retaining screws.
5. Remove the microphone (1).

Note. Refer to Fastener Notice in Cautions and Notices.

1. Install the microphone (1).
2. Install the microphone retaining screws. Tighten: Tighten the screws to 2 N.m (18 lb in)
3. Connect the microphone electrical connector.
4. Install the console retainers to the headliner bracket.
5. Push up on the console to secure it to the headliner.

Scheme 34

1. Remove the rear sail panels. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Remove the rear assist handles. Refer to «Assist Handle Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
3. Remove the rear roof mounted dome lamp. Refer to «Dome Lamp Replacement»(/cadillac/cts/i-2002-2007/remont/exterior-lights/#lighting-systems-introduction-and-removal-installation) in Lighting Systems.
4. Carefully lower the rear of the headliner to access the antenna module.
5. Disconnect the coax cables (3,4).
6. Disconnect the electrical connector (1).
7. Slide the diversity antenna module (2) off the mounting bracket.

1. Install the diversity antenna module (2) on to the mounting bracket.
2. Connect all the electrical connectors (1, 3, 4).
3. Install the rear roof mounted dome lamp. Refer to «Dome Lamp Replacement»(/cadillac/cts/i-2002-2007/remont/exterior-lights/#lighting-systems-introduction-and-removal-installation) in Lighting Systems.
4. Install the rear assist handles. Refer to «Assist Handle Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Install the rear sail panels. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Note. DO NOT apply paint or clear coat to the antenna. This will damage the function of the antenna, causing poor reception or loss of signal reception.

Scheme 35

Scheme 36

1. Remove the rear sail panels. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim. NOTE: Use care when removing or installing the headliner. Excessive bending will damage the headliner.
2. Lower the rear of the headliner.
3. Remove the foam tape from the antenna cable connection.
4. Disconnect the digital radio antenna connectors (1).
5. Remove the antenna bolt (2) and expansion sleeve (3). IMPORTANT: The retainer, located on the shaft of the radio antenna, was designed for assembly plant operations to retain the digital antenna to the roof before the bolt is installed. If the retainer on the radio antenna is broken or damaged during service of the antenna, the antenna will still operate as designed and should be reused.
6. Squeeze the retainer (4), located on the shaft of the antenna near the base, with a pair of pliers.
7. Remove the digital radio antenna.

1. Install the digital radio antenna to the roof. NOTE: Refer to «Fastener Notice»(/cadillac/cts/i-2002-2007/remont/oem-general-information/#cautions-and-notices__fastener-notice) in Cautions and Notices.
2. Route the wiring pigtail to the side in the slot on the antenna shaft and install the antenna expansion sleeve (3) and bolt (2) to the antenna shaft. Tighten: Tighten the bolt to 6 N.m (53 lb in).
3. Connect the antenna connectors (1).
4. Wrap the connectors (1) with foam tape.
5. Install the antenna cable connection above the AM/FM antenna module.
6. Install the antenna cable hold down clips.
7. Align the headliner to the roof panel.
8. Install the rear sail panels. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Scheme 37

1. Remove the rear shelf panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Remove the drivers side sail panel. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim
3. Lower the rear of the headliner to gain access to the satellite radio coax cable. Refer to «Headliner Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__headliner-replacement) in Interior Trim.
4. Disconnect the electrical connectors.
5. Remove the coax cable.

1. Install the coax cable.
2. Connect the electrical connectors.
3. Install the headliner. Refer to «Headliner Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim__headliner-replacement) in Interior Trim.
4. Install the drivers side sail panel. Refer to «Sail Panel Replacement»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Install the rear shelf panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Scheme 38

1. Remove the defroster grille. Refer to «Defroster Grille Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
2. Remove the fasteners (1) securing the speaker to the I/P retainer.
3. Disconnect the electrical connector (2).

1. Connect the electrical connector (2).
2. Install the speaker (1) to the I/P retainer. NOTE: Refer to Fastener Notice in Cautions and Notices.
3. Install the 4 fasteners securing the speaker. Tighten: Tighten the fasteners to 2 N.m (18 lb in).
4. Reinstall the defroster grille. Refer to «Defroster Grille Replacement»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.

Scheme 39

1. Remove the door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.
2. Disconnect the electrical connector (1).
3. Remove the screws (3) securing the speaker (2) to the door frame.
4. Remove the speaker from the door.

1. Connect the electrical connector (1).
2. Install the speaker (2) onto the door frame. NOTE: Refer to Fastener Notice in Cautions and Notices.
3. Install the screws (3) securing the speaker to the door frame. Tighten: Tighten the screws to 2 N.m (18 lb in).
4. Install the door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.

Scheme 40

1. Remove the front door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.
2. Disconnect the upper door speaker electrical connector from the door harness.
3. Remove the upper door speaker / grille assembly by gently prying the assembly from the molding.

1. Install the upper door speaker / grille assembly into the molding. Ensure that the speaker grille is properly seated in the molding. IMPORTANT: If the upper and lower door speakers on the door have been disconnected, ensure that the upper and lower speakers are reconnected to the proper door harness connector.
2. Connect the upper door speaker electrical connector to the door harness.
3. Install the door trim panel. Refer to «Trim Panel Replacement - Side Front Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.

Scheme 41

1. Remove the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.
2. Disconnect the electrical connector from the speaker.
3. Remove the 4 rear speaker fasteners.
4. Remove the rear speaker from the door trim panel.

1. Install the rear speaker to the rear door trim panel.
2. Install the 4 speaker fasteners. Tighten: Tighten the speaker fasteners to 2.5 N.m (22 lb in).
3. Connect the electrical connector to the speaker.
4. Install the rear door trim panel. Refer to «Trim Panel Replacement - Side Rear Door»(/cadillac/cts/i-2002-2007/remont/door-locks-anti-theft-systems/#door-system-mirror-system-window-system) in Doors.

Scheme 42

1. Remove the rear shelf trim panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
2. Disconnect the speaker electrical connector.
3. Remove the nuts securing the speaker the rear electrical carrier (1).
4. Remove the rear speaker.

1. Install the rear speaker to the rear electrical carrier. NOTE: Refer to Fastener Notice in Cautions and Notices.
2. Reinstall the nuts securing the speaker to the electrical carrier (1). Tighten: Tighten the fasteners to 9 N.m (80 lb in).
3. Connect the electrical connector.
4. Install the rear shelf trim panel. Refer to «Trim Panel Replacement - Rear Window Shelf»(/cadillac/cts/i-2002-2007/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.

Radio/Audio System Description and Operation

The Entertainment System on this vehicle is configured with either a base or an uplevel system. Both the base and uplevel systems contain a radio, antenna, speakers, and an audio amplifier. Satellite digital radio (U2K) is available with Uplevel Radio (UAV).

The following list shows the radios available for this vehicle

1. Base Radio (U2R) - AM/FM, CD, RDS, and Delco Amplifier
2. Uplevel Radio (U2S) - AM/FM, ICDX, RDS, and BOSE® Amplifier
3. Uplevel Radio (UAV) - AM/FM, ICDX, RDS, Navigation, and BOSE® Amplifier (U.S. and Canada)
4. Uplevel Radio (U2Y) - AM/FM, ICDX, RDS, Navigation, and BOSE® Amplifier (Europe)
5. Uplevel Radio (U2X) - AM/FM, ICDX, RDS, Navigation, and BOSE® Amplifier (Japan)

Radio Features

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

1. AM/FM Reception
2. XM Reception
3. Diversity Antenna System
4. Audio Amplifier
5. Theft Deterrent
6. Radio Personalization w/Home and Away Feature
7. Radio Data System (RDS)
8. XM Satellite Radio
9. XM Advisory Messages
10. Steering Wheel Controls

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 (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. What 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 off the ionosphere (skip)

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

FM Reception

The shorter wavelengths of the higher frequency FM band

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 miles). Even when out of a direct line of sight, the signal may be reflected into areas that would be in a shadow otherwise. Factors which affect the line of sight include

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.

Viewing XM Messages

To view the XM information messages, perform the following steps

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until Clock/Information Display appears on the display.
3. Press the TUNE/SEL knob to select. The last message will be displayed.

Diversity Antenna System

The diversity antenna system uses both front and back windows with an integral antenna built between the glass layers of the windshield and as an applique to the rear glass. Any damage to the antenna requires replacing the glass.

A diversity antenna system is designed to deliver the best radio signal reception possible. Two antennas are used to form a diversity system. The primary antenna is part of the rear window and looks similar to the defogger grid. This antenna receives both AM and FM signals. The secondary antenna is part of the front windshield and receives only FM signals.

The antenna reception signals are sorted out by the radio antenna module. The radio antenna module is enabled when the radio is turned on. When the AM or FM band is selected on the radio, the antenna module connects the rear window antenna directly to the radio. In addition, when the FM band is selected an enable signal is sent to the antenna module. Superimposed on this enable signal is the strength of the signal being received by the radio tuner. The antenna module now performs two functions. It switches between the front and rear antennas, monitoring the radio signal strength and combines both signals and phase aligns them to create one strong signal.

Audio Amplifier

The radio supplies low level audio signals to the audio amplifier in order to boost the signal sent to the speakers.

The radio uses the antenna input signal to create a stereo audio output signal, which is sent at the user-defined volume level to the audio amplifier. The audio amplifier amplifies the signal and sends it to the appropriate speakers. Tone, balance and fade information is sent by the radio to the audio amplifier via the class 2 communication circuit. The premium speaker system provides additional output processing by using a noise-canceling microphone. The microphone monitors interior ambient noise allowing the audio amplifier to modify the audio output. This maintains the sound at an enjoyable level.

Radio

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 the dash integration module (DIM) on the class 2 serial data circuit. 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. Two possible causes of this condition are

1. A radio is installed from another vehicle
2. The DIM 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 section to diagnose the Theftlock DTC for further information.

Digital Radio Receiver

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

1. A digital radio receiver is installed from another vehicle.
2. The DIM is replaced and not properly setup with the correct VIN information for that vehicle.

Radio Personalization w/Home and Away Feature

This feature allows two different drivers to store and recall specific radio settings. The settings recalled by the radio are determined by which remote keyless entry (RKE) transmitter (1 or 2) is used to enter the vehicle. The number on the back of the RKE transmitter corresponds to driver 1 or driver 2. The radio settings automatically adjust to where they were last set by the identified driver.

The radio can store home and away presets. Home and away presets allow you to use one set of preset radio settings in the area where you live, and another set when you go out of town. You do not need to reprogram your presets every time you travel. To change between home and away presets, perform the following steps

w/U2R or U2S

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until H/A HOME PRESETS is displayed.
3. Press the TUNE/SEL knob to change.

w/UAV, U2Y, or U2X

1. From the Radio menu, press the TUNE/SEL knob.
2. Use the keys on the right to select Home P-Sets or Away P-Sets.

When battery power is removed and later applied, you do not have to reset your home radio presets because the radio remembers the presets. However, you do have to reset the away radio presets.

Configurable Radio Display Keys w/U2R or U2S

The soft keys on either side of the display can be programmed for different functions. To program the soft keys, perform the following steps

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until SETUP is displayed; press the knob to select.
3. Turn the TUNE/SEL knob until CONFIGURE DISPLAY KEYS is displayed; press the knob to select.
4. Turn the TUNE/SEL knob to select the key to be programmed; press the knob to select. The current assigned feature is displayed.
5. Turn the TUNE/SEL knob to select the feature that you would like to assign to the key; press the knob to select.

Radio Data System (RDS)

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

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

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

RDS Basic Information

RDS basic information

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 RDS is not implemented properly by the FM Broadcaster.

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

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

Displaying Program Information

RDS displays textual information such as

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

RDS Traffic Feature (TA) w/U2R or U2S

This feature allows the radio to receive traffic announcements even with the volume muted, or when a CD or cassette is playing. When TA is on, the radio will search for another station with TA if the current station is not TA capable. To turn TA on or off, perform the following steps

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until TRAFFIC ANNOUNCE appears on the display.
3. Press the TUNE/SEL knob to select. An X will appear in the box when TA is on.

RDS Traffic Feature w/UAV, U2Y, or U2X

This feature allows the radio to receive traffic announcements even with the volume muted, or when a CD or cassette is playing. When TRAFFIC is on, the radio will search for another station with traffic if the current station is not capable. To turn TRAFFIC on or off, press the TRAFFIC button.

Viewing Messages w/U2R or U2S

When MSG appears on the radio display, a new message is available for viewing. These messages are from the RDS broadcaster and may be general information such as artist and song title. To view the text message, perform the following steps

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until RECALL RDS MESSAGE appears on the display.
3. Press the TUNE/SEL knob to select. The last message displayed will be displayed again.

Using Program Type Presets w/U2R or U2S

The radio has the ability to use RDS data to find stations according to program type (PTY). When in PTY mode the preset buttons are now PTY presets instead of frequency presets. To turn PTY mode on or off, perform the following steps

1. Press the TUNE/SEL knob to enter the main menu.
2. Turn the TUNE/SEL knob until PROGRAM TYPE MODE appears on the display.
3. Press the TUNE/SEL knob to select. An X will appear in the box when PTY is on.

Using RDS Seek w/UAV, U2Y, or U2X

The radio has the ability to use RDS data to find stations according to program type. To select program type perform the following steps

1. From the Radio menu, press the TUNE/SEL.
2. Select RDS List.
3. Select the program types to search for.
4. Select Seek RDS List to search for these program types.

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.

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

Steering Wheel Controls

Some audio functions are available using the steering wheel controls. The steering wheel controls consist of multiple momentary contact switches that connect a series of resistors. When a steering wheel control button is pressed, a specific resistance value is noted by the radio. This results in a generated voltage, unique to the particular button.

Configurable Steering Wheel Controls

The four buttons on the left side of the steering wheel can be programmed for different functions. To program the buttons, perform the following steps

w/ U2R or U2S

1. Press the TUNE/SEL knob.
2. Turn the TUNE/SEL knob until SETUP is displayed; press the knob to select.
3. Turn the TUNE/SEL knob until CONFIGURE SWC KEYS is displayed; press the knob to select.
4. Turn the TUNE/SEL knob to select the button to be programmed; press the knob to select. The current assigned feature is displayed.
5. Turn the TUNE/SEL knob to select the feature that you would like to assign to the button; press the knob to select.

w/ UAV, U2Y, or U2X

1. Press the MAIN button.
2. Press the Setup button.
3. Press the Prog SWC soft key.

Special Tools

Special Tools Illustration Tool Number/Description J39916-A CD and Cassette Diagnostic Audio Kit

See also:
• Scan Tool Does Not Power Up
• Power Mode Mismatch
• Diagnostic Trouble Code (DTC) List
• Diagnostic Trouble Code (DTC) List
• Circuit Testing
• Wiring Repairs
• Testing for Intermittent Conditions and Poor Connections
• Connector Repairs
• Transmitter Programming
• Tire Pressure Sensor Learn
• Checking Aftermarket Accessories
• Symptoms - Navigation Systems
• SIR Caution
• Steering Wheel Control Switch Assembly Replacement
• Instrument Panel Cluster (IPC) Replacement
• Deflector Replacement - Instrument Panel Air - Center
• HVAC Control Module Replacement
• Trim Panel Replacement - Rear Window Shelf
• Fastener Notice
• Compartment Trim Panel Replacement - Rear
• Dome Lamp Replacement
• Headliner Replacement
• Trim Panel Replacement - Side Front Door
• Diagnostic System Check - Radio/Audio System
• Symptoms - Entertainment
• Diagnostic Trouble Code (DTC) List
• Entertainment Connector End Views
• Digital Radio Receiver Setup
• Radio/Audio System Description and Operation
• Radio Poor Reception (w/o RPO UJ6)
• Radio Poor Reception (with RPO UJ6)
• Digital Radio Poor or No Reception
• Noise Compensated Volume Inoperative
• Steering Wheel Controls Inoperative (2.6L, 3.2L 3.6L (LY9, LA3, LY7))
• Steering Wheel Controls Inoperative (5.7L (LS6))
• Reduced Volume - One or More Speakers
• Speakers Inoperative - One or More
• Speakers Inoperative - All
• Speaker Replacement Reference
• Radio Setup