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Entertainment System: Overview GMC Envoy II

Entertainment Systems 22 illustrations ~504 words

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)

Scheme 9

Scheme 9: Entertainment Schematic Icons
Scheme 9: Entertainment Schematic Icons

Scheme 10

Scheme 10: Radio/Audio System Schematics
Scheme 10: Radio/Audio System Schematics

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Scheme 12

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Scheme 17

Scheme 17: Video System Schematics
Scheme 17: Video System Schematics

Scheme 18

Scheme 18: Entertainment Component Views
Scheme 18: Entertainment Component Views
CalloutComponent Name
1Headlamp - Low Beam - Right
2Headlamp - High Beam - Right
3Cellular Antenna
4Headlamp - High Beam - Left
5Headlamp - Low Beam - Left
6Outside Rearview Mirror - Driver
7Marker Lamp - LF
8Park/Turn Signal Lamp - LF
9Cornering Lamp - Left (T87)
10Fog Lamp - LF (T96)
11Fog Lamp - R (T96)
12Cornering Lamp - Right)
13Park/Turn Signal Lamp - RF
14Marker Lamp - RF
15Radio Antenna
16Outside Rearview Mirror - Passenger

Scheme 19

Scheme 19
Scheme 19
CalloutComponent Name
1Radio Antenna
2Headlamp - High Beam - Right
3Headlamp - Low Beam - Right
4Headlamp - Low Beam - Left
5Cellular Antenna
6Headlamp - High Beam - Left
7Outside Rearview Mirror - Driver
8Marker Lamp - LF
9Park/Turn Signal lamp - LF
10Fog Lamp - LF (T96)
11Fog Lamp - RF (T96)
12Park/Turn Signal lamp - RF
13Marker Lamp - RF
14Outside Rearview Mirror - Passenger

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Scheme 20
Scheme 20
CalloutComponent Name
1Radio Antenna
2Digital Radio Antenna
3Cellular Antenna
4Outside Rearview Mirror - Driver
5Park Lamp - LF
6Park Lamp - LF
7Headlamp - High Beam - Left
8Marker Lamp - LF
9Cornering Lamp - Left (T87)
10Fog Lamp - LF (T96)
11Headlamp - Low Beam - Left
12Turn Signal Lamp - LF
13Turn Signal Lamp - RF
14Headlamp - Low Beam - Right
15Fog Lamp - RF (T96)
16Cornering Lamp - Right (T87)
17Marker Lamp - RF
18Headlamp - High Beam - Right
19Park Lamp - RF
20Park Lamp - RF
21Outside Rearview Mirror - Passenger

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Scheme 21
CalloutComponent Name
1Digital Radio Receiver (U2K)

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Scheme 22
CalloutComponent Name
1Speaker - LF I/P (UQA)
2Ambient Light Sensor (CJ3)/Ambient Light/Sunload Sensor Assembly (CJ2)
3Speaker - RF I/P (UQA)

Scheme 23

Scheme 23
Scheme 23
CalloutComponent Name
1Steering Wheel Control Switch Assembly - Upper Left (STW)
2Passlock Sensor Connector
3Ignition Key Alarm Switch
4Ignition Lock Cylinder Control Actuator
5Ignition Lock Cylinder Control Actuator Connector
6Ignition Switch
7Ignition Key Cylinder
8Steering Wheel Control Switch Assembly - Upper Right (STW)
9Horn Switch
10Steering Wheel Control Switch Assembly - Lower Right (STW)
11C277
12Steering Wheel Control Switch Assembly - Lower Left (STW)
13Turn Signal/Multifunction Switch

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Scheme 24
Scheme 24
CalloutComponent Name
1Instrument Panel
2Radio Antenna
3Radio
4Instrument Panel Harness

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Scheme 25
CalloutComponent Name
1Driver Door
2Speaker - LF Door (w/UQA)/Speaker Assembly - LF Door (w/o UQA)

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Scheme 26
CalloutComponent Name
1Speaker - RF Door (w/UQA)/Speaker Assembly - RF Door (w/o UQA)
2Front Passenger Door

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Scheme 27
Scheme 27
CalloutComponent Name
1LR Door
2Speaker - LR Door

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Scheme 28
Scheme 28
CalloutComponent Name
1Speaker - RR Door
2RR Door

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Scheme 29
Scheme 29
CalloutComponent Name
1Body Side Inner Lower Panel - Right
2Audio Amplifier

Scheme 30

Scheme 30
Scheme 30
CalloutComponent Name
1Audio Amplifier
2Body Side Inner Panel - Left

Test Description

The numbers below refer to the step numbers 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.
StepActionValuesYesNo
Schematic Reference: Radio/Audio System Schematics Connector End Views Reference: Entertainment Connector End Views
1Did you perform the Diagnostic System Check - Vehicle?Go to Step 2Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2With a scan tool, observe the digital radio antenna in the digital radio receiver (DRR) data list. Does the scan tool indicate that the digital radio antenna is within the specified range?1200-1800 mV or 42-118 mAGo to Step 3Go to Step 4
3Test the antenna cables for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 10Go to Step 8
4Disconnect the antenna cables from the DRR. Measure the voltage from the center conductor of the inboard antenna connector on the DRR to one of the case screws. Does the voltage measure within the specified range?4.5-5.5 VGo to Step 5Go to Step 6
5Test the antenna cables for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 10Go to Step 8
6Inspect for poor connections at the DRR. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 10Go to Step 7
7Replace the DRR. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?Go to Step 10
8Inspect for poor connections at the digital radio antenna. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 10Go to Step 9
9Replace the digital radio antenna. Refer to Antenna Replacement - Digital Radio . Did you complete the replacement?Go to Step 10
10Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?Go to Step 2System OK

DTC B1259

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

  1. 3: This step tests for the proper operation of the circuit in the low voltage range.
StepActionValuesYesNo
Schematic Reference: Radio/Audio System Schematics Connector End View Reference: Entertainment Connector End Views
1Did you perform the Diagnostic System Check - Vehicle?Go to Step 2Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2Install a scan tool. Turn ON the ignition, with the engine OFF. With a scan tool, observe the SWC Switch Voltage parameter in the Body Control Module data list. Does the scan tool indicate that the SWC Switch Voltage parameter is near the specified value?0 VGo to Testing for Intermittent Conditions and Poor Connections in Wiring SystemsGo to Step 3
3CAUTION: Refer to SIR Caution in Cautions and Notices. Disable the SIR system. Refer to SIR Disabling and Enabling Zone 1 and SIR Disabling and Enabling Zone 3 in SIR. Turn OFF the ignition. Disconnect the left steering wheel controls (SWC). Turn ON the ignition, with the engine OFF. With a scan tool, observe the SWC Switch Voltage parameter. Does the scan tool indicate that the SWC Switch Voltage parameter is near the specified value?0 VGo to Step 6Go to Step 4
4Turn OFF the ignition. Disconnect the right SWC. Turn ON the ignition, with the engine OFF. With a scan tool, observe the SWC Switch Voltage parameter. Does the scan tool indicate that the SWC Switch Voltage parameter is near the specified value?0 VGo to Step 7Go to Step 5
5Test the remote radio control signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 12Go to Step 8
6Inspect for poor connections at the harness connector of the left steering wheel control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 12Go to Step 9
7Inspect for poor connections at the harness connector of the right steering wheel control switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 12Go to Step 10
8Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?Go to Step 12Go to Step 11
9Replace the left steering wheel control switch. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column. Did you complete the replacement?Go to Step 12
10Replace the right steering wheel control switch. Refer to Steering Wheel Control Switch Assembly Replacement in Steering Wheel and Column. Did you complete the replacement?Go to Step 12
11Replace BCM. Refer to Control Module References in Computer/Integrating Systems. Did you complete the replacement?Go to Step 12
12Enable the SIR system. Refer to SIR Disabling and Enabling Zone 1 and SIR Disabling and Enabling Zone 3 in SIR. Use the scan tool in order to clear the DTCs. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text. Does the DTC reset?Go to Step 2System OK
CAUTION
Refer to SIR Caution in Cautions and Notices.

DTC B2815

Symptoms - Entertainment

IMPORTANTThe following steps must be completed before using the Symptom tables.
  1. Perform the «Diagnostic System Check - Vehicle»(ref-200355-S37572612702005102000000) in Vehicle DTC Information 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-200368-S16148579232005102000000) .

Radio/Audio System Description and Operation

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

The following list shows the radios available for this vehicle

  1. Radio (UB0) - AM/FM with CD
  2. Radio (UB1) - AM/FM, Cassette and CD
  3. Radio (UC6) - AM/FM, Integral Multi Disc CD Changer
  4. Navigation Radio (UM8) - RADIO - AM/FM Stereo, Seek/Scan, CD, ETR, Navigation, Clock
ControlsFunctions
All Radios, except UM8
PowerPush PWR/PUSH/VOL knob to turn the radio ON.
VolumeThe volume is adjusted by rotating the PWR/PUSH/VOL knob.
Automatic Volume ControlPress the AUTOVOL button.
TuneTurn the TUNE/SELECT/PUSH RCL knob.
SeekMomentarily press the SEEK/SCAN button.
ScanHold the SEEK/SCAN button at least 4 seconds.
PresetsSix AM, Six FM1 and Six FM2
Preset SavingPress and hold desired button until an audible beep is heard.
Set ClockPress and hold the HR or MN button until an audible beep indicates the time set mode has been entered. Once the beep is heard, the time can be set by tapping each button to incrementally adjust the time. Holding down each button will rapidly change the time.
RecallPush the TUNE/SELECT/PUSH RCL knob.
Fade or BalancePress the BAL/FADE button to select and adjust w/SELECT knob.
Bass, Treble or MidrangePress the TONE button to select and adjust w/SELECT knob.
Automatic TonePress AUTO TONE button.
Navigation Display Head, UM8
PowerPush PWR/VOL knob to turn the radio on.
NAVDisplays the map guidance screen.
NAV RPTRepeats the last voice guidance message.
SETUPDisplays the setup function for the Navigation Radio.
Scroll/Select knobPush to display menu/Move up/down and left/right to highlight selection/Push to select.
Soft Key ButtonsPush to select the options listed on the navigation screen.

Radio Features

ControlsUB1 Radio
EjectEJECT button
Fast ForwardPreset button 1
ReversePreset button 4
Auto ReverseYes
SidePreset button 5
PreviousPreset button 1
NextPreset button 2
DolbyPreset button 6
RepeatNA

Cassette Features

ControlsUB1 RadioUB0 RadioUC6 Radio
EjectEJECT button
Fast ForwardPreset button 1
ReversePreset button 4
DiscPreset button 5
PreviousPreset button 1
NextPreset button 2
DolbyPreset button 6
RepeatNA
RandomPreset button 6

Compact Disc Features

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

  1. AM/FM Reception
  2. Theft Deterrent
  3. Integral Multi Disc CD Changer (IMDX)
  4. Amplifier
  5. Automatic Volume Control
  6. Radio Data System (RDS)
  7. Tape/CD Player Error Messages
  8. Rear Seat Audio (RSA)
  9. XM Satellite Radio

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