Cellular System, Entertainment System, and Navigation System: Other Chevrolet Sonic I

Reference Information

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, A11 Radio ON, mute OFF.
2. Verify clear audio is heard from each speaker, adjusting fade and balance controls to test each speaker individually. If audio is inoperative from one or more speakers, or the audio emitted is not clear. Refer to «Circuit/System Testing»(ref-542489-S21391414932013041600000) . If clear audio is heard from all speakers.
3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

1. «Speaker Replacement Reference»(ref-542489-S20973784912013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, A11 Radio ON. Verify station reception is normal when tuned to several known good AM and FM stations. If AM or FM reception is poor. Refer to «Circuit/System Testing»(ref-542489-S16410314992013041600000) If reception is normal
2. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Special Tools

EL-48028 Digital Radio Test Antenna

1. With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM.
2. Verify DTC B125C is not set as current and the No XM Signal or Check Antenna message is not displayed on the radio. If DTC B125C is set as current or the No XM Signal or Check Antenna message is displayed. Refer to «Circuit/System Testing»(ref-542489-S22165268502013041600000) . If DTC B125C is not set as current and the No XM Signal or Check Antenna message is not displayed.
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, A11 Radio ON.
2. Verify DTC B1271 is not set. If DTC B1271 is set Replace the A11 Radio. If DTC B1271 is not set
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for Radio replacement, programming, and setup

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
2. «Circuit Testing»(ref-542498-S42729642072013041600000)
3. «Wiring Repairs»(ref-542498-S06256207262013041600000)
4. «Connector Repairs»(ref-542498-S10348064002013041600000)

Perform the Diagnostic Repair Verification after completing the repair.

1. «Communication Interface Module Battery Replacement»(ref-542489-S22196124502013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Perform the Diagnostic Repair Verification after completing the repair.

1. «Mobile Telephone Microphone Replacement»(ref-542489-S01719849992013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. It is necessary to have the vehicle in a quiet, open outside area where a cellular call can be successfully placed.

1. Ignition ON.
2. Verify that DTC B2455 is set. If DTC B2455 is not set Refer to «OnStar Microphone Malfunction»(ref-542489-S08870047852013041600000) . If DTC B2455 is set
3. Verify that your voice can be heard clearly after placing a cellular call. If your voice can not be heard clearly Refer to «Circuit/System Testing»(ref-542489-S40474788942013041600000) . If your voice can be heard clearly
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Mobile Telephone Microphone Replacement»(ref-542489-S01719849992013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for Radio replacement, programming and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

Note. The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning the ignition ON for the GPS satellites to acquire vehicle signal.

1. Ignition ON.
2. Verify that DTC B2470 is not set. If DTC B2470 is set Refer to «Circuit/System Testing»(ref-542489-S33182983282013041600000) If DTC B2470 is not set
3. Verify that a call can be successfully placed to the OnStar Call Center by pressing the blue OnStar button. If unable to connect with the OnStar Call Center. Refer to «Unable to Contact OnStar Call Center»(ref-542489-S13242812652013041600000) If able to connect with the OnStar Call Center
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, setup, and programming

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

1. Ignition ON.
2. Verify that each button of the S51 Telematics Button Assembly operates normally by pressing each button individually. If none of the buttons operate normally Refer to «Circuit/System testing»(ref-542489-S12602039042013041600000) If some, but not all, of the buttons operate normally Test or replace the A10 Inside Rearview Mirror If all of the buttons operate normally
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair procedure.

1. «Inside Rearview Mirror Replacement»(ref-542505-S01948752192013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming, and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Special Tools

EL-50334-20 Multi-Media Interface Tester (Multi-Media Interface Tool)

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for telematics communication interface control module replacement, programming and setup.

Symptoms - Cellular Communication

Note. The following steps must be completed before using the symptom table.

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) 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 «OnStar Description and Operation»(ref-542489-S07008659782013041600000) .

Intermittent

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

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

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Verify the application is installed on the mobile device and is up to date. If the application is not installed or is not up to date. Install or update the application on the device. If the application is installed on the mobile device and is up to date
2. Verify the application operates correctly on the mobile device. If the application is not operating correctly on the mobile device. Refer to the application website. If the application is operating correctly on the mobile device.
3. Verify the A11 Radio calibrations are current. If the radio calibrations are not current Reprogram the A11 Radio and re-evaluate the concern. If no update calibrations are available
4. Verify the application is installed on the A11 Radio and is up to date. If the application is not installed or is not up to date. Install or update the application on the A11 Radio. If the application is installed on the A11 Radio and is up to date
5. Ignition ON, A11 Radio ON.
6. Verify the mobile device can connect to the infotainment system. Refer to the owners manual for information on the preferred connection method for the device. If the mobile device cannot connect to the vehicle infotainment system. If unable to connect via Bluetooth, refer to «Bluetooth Malfunction (Radio - With UH7)»(ref-542489-S06007457782013041600000) , «Bluetooth Malfunction (Radio - Without UH7)»(ref-542489-S39692444062013041600000) , «Bluetooth Malfunction (OnStar)»(ref-542489-S34922590022013041600000) . If unable to connect via USB, refer to «Auxiliary Audio Input Malfunction»(ref-542489-S37843763322013041600000) . If the mobile device connects to the vehicle infotainment system.
7. Launch the application.
8. Verify the applications operates properly with the vehicle infotainment system. If the application does not function properly Refer to «diagnostic aids»(ref-542489-S13040511102013041600000) . If the application functions properly
9. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

1. EL-50334-20 Multi-Media Interface Tester (MIT)
2. EL-50334-50 USB Cable and Adapter Kit

Auxiliary Audio Input Jack - Console

1. Verify no DTCs are present. If any DTCs are present Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) . If no DTCs are present
2. Ignition ON, radio ON.
3. Verify the infotainment system switches to AUX as the audio source with the EL-50334-20 Multi-Media Interface Tester (MIT) connected to the auxiliary audio input jack. If the infotainment system does not switch to AUX as the audio source Refer to «Circuit/System Testing - Auxiliary Audio Input Jack»(ref-542489-S23756821052013041600000) . If the infotainment system switches to AUX as the audio source
4. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the vehicle infotainment system while operating the test tool to begin audio playback. If audio is not heard from the test tool Refer to «Circuit/System Testing - Auxiliary Audio Input Jack»(ref-542489-S23756821052013041600000) . If audio is heard from the test tool
5. All OK.

Auxiliary Audio Input Jack - Radio (If Equipped)

1. Verify no DTCs are present. If any DTCs are present Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) . If no DTCs are present
2. Ignition ON, radio ON.
3. Verify the infotainment system switches to AUX as the audio source with the EL-50334-20 Multi-Media Interface Tester (MIT) connected to the auxiliary audio input jack. If the infotainment system does not switch to AUX as the audio source Replace the A11 Radio. If the infotainment system switches to AUX as the audio source
4. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the vehicle infotainment system while operating the test tool to begin audio playback. If audio is not heard from the test tool Replace the A11 Radio. If audio is heard from the test tool
5. All OK.

USB Port

1. Verify no DTCs are present. If any DTCs are present Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) . If no DTCs are present
2. Ignition ON, radio ON.
3. Verify the infotainment system switches to USB as the audio source with the EL-50334-20 Multi-Media Interface Tester (MIT) connected to the USB port. If the infotainment system does not switch to USB as the audio source Refer to «Circuit/System Testing - USB Port»(ref-542489-S23756821052013041600000) . If the infotainment system switches to USB as the audio source
4. Verify the audio from the EL-50334-20 Multi-Media Interface Tester (MIT) is heard through the vehicle infotainment system while operating the system to play audio from the test tool. If audio is not heard from the test tool Refer to «Circuit/System Testing - USB Port»(ref-542489-S23756821052013041600000) . If audio is heard from the test tool
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Audio Disc Player and USB Receptacle Replacement»(ref-542489-S01517187622013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Verify the radio calibrations are current. If the radio calibrations are not current Reprogram the A11 Radio and re-evaluate the concern. If no update calibrations are available
2. Ignition ON, infotainment system ON.
3. Verify the infotainment system successfully pairs with a mobile device. If the infotainment system does not successfully pair with a mobile device Attempt to pair another mobile device. If the infotainment system cannot pair with any mobile device, replace the A11 Radio. If the infotainment system successfully pairs with the mobile device The malfunction is related to the mobile device. If the infotainment system successfully pairs with the mobile device
4. Verify the infotainment system performs the desired feature using the mobile device. If the feature does not function correctly Pair another mobile device. Verify the infotainment system performs the desired feature using the mobile device. If the infotainment system cannot perform the desired feature with any mobile device, replace the A11 Radio. If the infotainment system successfully performs the desired feature. The malfunction is related to the mobile device. If the feature functions correctly
5. All OK. Refer to «Diagnostic Aids»(ref-542489-S12701153582013041600000) .

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-50334-20 Multi-Media Interface Tester (MIT)

1. Verify no DTCs are present. If any DTCs are present Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) . If no DTCs are present
2. Verify the A11 Radio calibrations are current. If the radio calibrations are not current Reprogram the A11 Radio and re-evaluate the concern. If no update calibrations are available
3. Ignition ON, infotainment system ON.
4. Verify the infotainment system successfully pairs with the MIT tool. If the infotainment system does not successfully pair with the MIT tool. Replace the A11 Radio. If the infotainment system successfully pairs with the MIT tool.
5. Verify the infotainment system successfully completes the desired feature test using the MIT tool. If the feature test is not successful Replace the A11 Radio. If the feature test is successful
6. All OK. Refer to «Diagnostic Aids»(ref-542489-S28030237992013041600000) .

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for radio replacement, programming, and setup

1. Ignition ON.
2. Verify DTC B2485 is not set. If DTC B2485 is set Refer to «DTC B2485»(ref-542489-S14327576792013041600000) If DTC B2485 is not set
3. Ignition ON, infotainment system ON.
4. Verify the infotainment system successfully pairs with the Multi-Media Interface Tool. If the infotainment system does not successfully pair with the Multi-Media Interface Tool. Verify the vehicle is equipped with an external Bluetooth® Antenna. If not equipped with an external Bluetooth® Antenna, replace the K73 Telematics Communication Interface Control Module If equipped with an external Bluetooth® Antenna Replace the Bluetooth® Antenna. Verify the infotainment system successfully pairs with the Multi-Media Interface Tool. If the infotainment system does not successfully pair with the Multi-Media Interface Tool, replace the K73 Telematics Communication Interface Control Module. If the infotainment system successfully pairs with the Multi-Media Interface Tool. All OK. If the infotainment system successfully pairs with the Multi-Media Interface Tool.
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair procedure.

Control Module References for telematics communication interface control module replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Special Tools

EL-48028 Digital Radio Test Antenna

1. With the vehicle outside in an area with an unobstructed view of the southern sky, tune to XM.
2. Verify DTC B125C is not set as current and the No XM Signal or Check Antenna message is not displayed on the radio. If DTC B125C is set as current or the No XM Signal or Check Antenna message is displayed. Refer to «Circuit/System Testing»(ref-542489-S32849106382013041600000) . If DTC B125C is not set as current and the No XM Signal or Check Antenna message is not displayed.
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. It is necessary to have the vehicle in a quiet, open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

1. Ignition ON.
2. Verify that DTC B2455 is not set. If DTC B2455 is set Refer to «DTC B2455 (OnStar)»(ref-542489-S02035105122013041600000) , «DTC B2455 (Radio)»(ref-542489-S11800561072013041600000) . If DTC B2455 is not set
3. Verify that a successful OnStar voice command can be made. If your voice can not be heard clearly Refer to «Circuit/System Testing - Microphone Malfunction»(ref-542489-S04614469932013041600000) . If your voice can be heard clearly
4. Verify that your voice is heard clearly by the OnStar Call Center after completing a blue button press. If your voice can not be heard clearly Refer to «Circuit/System Testing - Cellular Telephone Voice Malfunction»(ref-542489-S04614469932013041600000) . If your voice can be heard clearly
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair procedure.

1. «Mobile Telephone Microphone Replacement»(ref-542489-S01719849992013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio or telematics communication interface control module replacement, programming, and setup.

Schematic Reference

1. «OnStar Schematics»(ref-542489-S03946531602013041600000)
2. «Radio/Navigation System Schematics»(ref-542489-S42763504632013041600000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, radio ON.
2. Verify that audio is heard clearly through all speaker channels when tuning radio to a known good station. If audio is not heard clearly Refer to «Speaker Malfunction»(ref-542489-S06119352312013041600000) If audio is heard clearly
3. Verify that the Connecting to OnStar® message is heard clearly through the audio system when the OnStar® blue button is pressed. If OnStar message is noisy or distorted Refer to «Circuit/System Testing»(ref-542489-S24699029162013041600000) If OnStar message is heard clearly
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair procedure.

Control Module References for radio or telematics communication interface control module replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning the ignition ON for the vehicle to acquire the GPS satellites signal.

1. Ignition ON.
2. Verify that no DTCs are set. If any DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) . If no DTCs are set
3. Verify that an OnStar advisor can locate the vehicle after performing a blue button press. If the advisor can not locate the vehicle Refer to «Circuit System Testing»(ref-542489-S01947526122013041600000) . If the advisor can locate the vehicle
4. All OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for Radio replacement, setup, and programming

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. If the green LED is off with the ignition ON and the LED functions correctly when commanded with the scan tool, contact the OnStar Center to confirm the vehicle has a current subscription.

1. Ignition ON.
2. Verify no DTC are set. If any DTC are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) If no DTC are set
3. Verify that the green LED turns ON and OFF when commanding the Green Indicator ON and OFF with a scan tool. If the green LED does not turn ON and OFF Refer to «Circuit/System Testing - Green LED Test»(ref-542489-S05543863282013041600000) If the green LED turns ON and OFF
4. Verify that the red LED turns ON and OFF when commanding the Red Indicator ON and OFF with a scan tool. If the red LED does not turn ON and OFF Refer to «Circuit/System Testing - Red LED Test»(ref-542489-S05543863282013041600000) If the red LED turns ON and OFF
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Inside Rearview Mirror Replacement»(ref-542505-S01948752192013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes. It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

1. Ignition ON.
2. Verify that the horn, lights, and the door locks on the vehicle operate properly. If an applicable vehicle system does not operate properly Refer to «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) . If all applicable vehicle systems operate properly
3. Verify that a call can be successfully placed to the OnStar Call Center by pressing the blue OnStar button. If unable to contact the OnStar® call center Refer to «Unable to Contact OnStar Call Center»(ref-542489-S13242812652013041600000) If able to contact the OnStar Call Center
4. Verify with the OnStar advisor that all remote functions (door locks, lights, and horn) work. If the remote functions do not operate when requested Replace the K73 Telematics Communication Interface Control Module If the remote functions operate when requested
5. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for telematics communication interface control module replacement, programming and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Note. Contact the OnStar® Call Center first before pressing the emergency button in order to notify them of the test.

1. Ignition ON.
2. Verify no DTCs are set. If any DTCs are set «Diagnostic Trouble Code (DTC) List - Vehicle»(ref-542476-S32003136202013041600000) If no DTCs are set
3. Verify that each button of the S51 Telematics Button Assembly operates normally by pressing each button individually. If none of the buttons operate normally Refer to «Circuit/System Testing»(ref-542489-S29512263082013041600000) . If some, but not all, of the buttons operate normally Test or replace the A10 Inside Rearview Mirror. If all of the buttons operate normally
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Inside Rearview Mirror Replacement»(ref-542505-S01948752192013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming and setup.

OnStar Steering Wheel Control Functions Malfunction

Some vehicles equipped with the OnStar® system have the capability of accessing voice mailboxes and other automated phone systems by means of the steering wheel controls, while the OnStar® Personal Calling feature is in use. If the "Talk" or "Mute" button (depending upon the vehicle) on the steering wheel controls is depressed during an OnStar® Personal Calling call, the telematics communication interface control module receives the message on the serial data bus from either the radio or body control module. This message is interpreted as a request to turn any spoken numbers into dual tone multi-frequency tones to be delivered over the airwaves to the phone system the user is communicating with. Complete instructions for operation of these features can be found in the information provided to the customer with the OnStar® system.

The steering wheel controls are a resistor network that consist of multiple momentary contact switches and a series of resistors. The switches and resistor network are 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, to be interpreted by either the radio or BCM. In the event the OnStar® steering wheel control functions are inoperative, technicians should refer to Steering Wheel Controls Malfunction , to begin diagnosis of the steering wheel control concern.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, A11 Radio ON. Verify station reception is normal when tuned to several known good AM and FM stations. If AM or FM reception is poor. Refer to «Circuit/System Testing»(ref-542489-S34738706242013041600000) If reception is normal
2. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

Radio/Navigation System Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Radio/Audio System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-50334-50 USB Cable and Adapter Kit

1. Ignition ON, A11 Radio ON, mute OFF.
2. Verify clear audio is heard from each speaker, adjusting fade and balance controls to test each speaker individually. If audio is inoperative from one or more speakers, or the audio emitted is not clear Refer to «Circuit/System Testing»(ref-542489-S13638738512013041600000) . If clear audio is heard from all speakers
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Speaker Replacement Reference»(ref-542489-S20973784912013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for radio replacement, programming, and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-49903 GM OnStar Antenna Diagnostic Tool Kit

Note. The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 min after turning the ignition ON for the GPS satellites to acquire vehicle signal.

1. Ignition ON.
2. Verify that DTC B2470 is not set. If DTC B2470 is set Refer to «DTC B2470»(ref-542489-S07776816412013041600000) If DTC B2470 is not set
3. Verify that a call can be successfully placed to the OnStar Call Center by pressing the blue OnStar button. If unable to connect with the OnStar Call Center. Refer to «Circuit/System Testing»(ref-542489-S17087251272013041600000) If able to connect with the OnStar Call Center
4. All OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Radio Antenna Base Replacement»(ref-542489-S30721226432013041600000)
2. «Control Module References»(ref-542499-S01936129122013041600000) for telematics communication interface control module replacement, programming, and setup.

Schematic Reference

OnStar Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

OnStar Description and Operation

Electrical Information Reference

1. «Circuit Testing»(ref-542498-S42729642072013041600000)
2. «Connector Repairs»(ref-542498-S10348064002013041600000)
3. «Testing for Intermittent Conditions and Poor Connections»(ref-542498-S27468711012013041600000)
4. «Wiring Repairs»(ref-542498-S06256207262013041600000)

Note. It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites. The vehicle should be located in a quiet area.

1. Ignition ON, press the blue OnStar Call button.
2. Verify that your voice is heard clearly by the OnStar Call center. If your voice can not be heard clearly Refer to «OnStar Microphone Malfunction»(ref-542489-S08870047852013041600000) If your voice can be heard clearly
3. Verify that the system responds appropriately to all voice commands by pressing the voice command button and attempting to operate the system using multiple voice commands. If the OnStar system does not respond to any voice commands Replace the K73 Telematics Communication Interface Control Module If the OnStar system responds to some, but not all voice commands Refer to «OnStar Description and Operation»(ref-542489-S07008659782013041600000) for tips on proper pronunciation If the OnStar system responds to all voice commands
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair procedure.

Control Module References for telematics communication interface control module replacement, programming, and setup.

Scheme 9

Mobile Telephone Microphone Replacement

Scheme 10

Communication Interface Module Replacement

Scheme 11

Communication Interface Module Battery Replacement

Scheme 12

Wireless Communication Interface Antenna Replacement

Scheme 13

Communication Interface Module Bracket Replacement

Scheme 14

Radio Replacement (With US8)

Scheme 15

Radio Replacement (Without US8)

Scheme 16

Audio Disc Player and USB Receptacle Replacement

Scheme 17

Radio Antenna Base Replacement

Scheme 18

Radio Antenna Replacement

Scheme 19

Radio and Telephone Control Switch Replacement

Scheme 20

Radio Windshield Side Garnish Molding Speaker Replacement

Scheme 21

Radio Front Side Door Speaker Replacement

Scheme 22

Radio Rear Side Door Speaker Replacement

Telematics Communication Interface Control Module

The telematics communication interface control module is a cellular device that allows the user to communicate data and voice signals over the national cellular network. Power is provided by a dedicated, fused B+ circuit. Ground is provided through the vehicle wiring harness attached to the module. The ignition state is determined by the telematics communication interface control module through serial data messaging.

Dedicated circuits are used to connect the telematics communication interface control module to a microphone, the button assembly, and to command the status LED. The telematics communication interface control module communicates with the rest of the vehicle over the serial data bus.

The module houses 2 technology systems, one to process GPS data, and another for cellular information. The cellular system connects the OnStar® system to the cellular carrier's communication system by interacting with the national cellular infrastructure. The module sends and receives all cellular communications over the cellular antenna and cellular antenna coax. GPS satellites orbiting earth are constantly transmitting signals of their current location. The OnStar® system uses the GPS signals to provide location on demand.

The module also has the capability of activating the horn, initiating door lock/unlock, or activating the exterior lamps using the serial data circuits. These functions can be commanded by the OnStar® Call Center per a customer request.

Secondary OnStar® Controls

Some vehicles may have an additional button that when pushed can engage the OnStar® system. The button may be a symbol of a face with sound waves, or may say MUTE, or be a symbol of a radio speaker with a slash through it.

By engaging the OnStar® system with this feature, the user can interact with the system by use of voice commands. A complete list of these commands is supplied in the information provided to the customer. If the information is not available for reference, at any command prompt the user can say "HELP" and the telematics communication interface control module will return an audible list of available commands.

OnStar® Microphone

The OnStar®, or cellular microphone, can be a part of the rearview mirror assembly, or on some vehicle lines, a separate, stand alone unit. In either case, the telematics communication interface control module supplies approximately 10 volts to the microphone on the cellular microphone signal circuit, and voice data from the user is sent back to the telematics communication interface control module over the same circuit. A cellular microphone low reference circuit or a drain wire provides a ground for the microphone.

Cellular and GPS Antennas

This vehicle will be equipped with one of the following types of antennas

1. A combination cellular and navigation antenna, which brings the functions of both into a single part
2. A cellular, GPS, and digital radio receiver antenna, which also incorporates the functionality of the digital radio receiver satellite antenna (XM).
3. A cellular, GPS, and digital radio receiver antenna, which also incorporates the AM/FM antenna.

The cellular antenna is the component that allows the OnStar® system to send and receive data over airwaves by means of cellular technology. The antenna is connected at the base to a coax cable that plugs directly into the telematics communication interface control module.

The GPS antenna is used to collect the signals of the orbiting GPS satellites. Within the antenna is housed a low noise amplifier that allows for a more broad and precise reception of this data. The antenna is connected at the base to a coax cable that plugs directly into the telematics communication interface control module. The cable also provides a path for DC current for powering the antenna.

The OnStar® Call Center also has the capability of communicating with the vehicle during an OnStar® call to retrieve the latest GPS location and transmit it to the OnStar® Call Center. A history location of the last recorded position of the vehicle is stored in the module and marked as aged, for as long as the module power is not removed. Actual GPS location may take up to 10 minutes to register in the event of a loss of power.

OnStar® RemoteLink

OnStar® RemoteLink is a mobile app to link mobile devices to a vehicle for limited diagnostics and feature controls. After downloading the app and registering the device, vehicle owners with an eligible vehicle can use their mobile devices to access real-time data from their vehicle and perform specific commands remotely.

All communication between the app and the vehicle is powered by OnStar's® advanced connected vehicle technology. An active OnStar® account as well as a valid OnStar® username and password are required to use the app. The remote commands must be enabled by logging into the user's OnStar® account prior to using the app.

Vehicle Control Features

1. Lock/Unlock doors
2. Start vehicle remotely
3. Activate your Horn & Lights
4. Contact an OnStar Advisor, Roadside Assistance or your Preferred Dealer

Available Vehicle Data

1. Real-time fuel information, including fuel range, fuel remaining, and lifetime MPG
2. Lifetime mileage
3. Remaining oil life
4. Current tire pressure information
5. OnStar® account information

Compass Heading

The telematics communication interface module has a compass feature to calculate vehicle direction which is displayed via the instrument panel cluster or designated display. The compass heading is determined by dead reckoning until the GPS 3d fix is established. The dead reckoning is accomplished by using the yaw rate sensors and wheel ticks to determine heading changes from a GPS known heading. The GPS 3d fix heading is determined by the deferential of two locations.

Bluetooth® (If Equipped)

Bluetooth® wireless technology is a short-range communications technology intended to replace the cables connecting portable and/or fixed devices while maintaining high levels of security. Only vehicles with steering wheel controls will have Bluetooth® functionality. In order to utilize the vehicle's Bluetooth® system, a Bluetooth® equipped cellular phone is required.

The Bluetooth® antenna is a small fixed antenna connected directly to the telematics communication interface control module and is used to send and receive signals from a Bluetooth® enabled cellular phone. The antenna utilizes no cabling and is not external to the vehicle. The available features and functions are determined by the software within the device being used and the telematics communication interface control module. The operating range of the signal from the vehicle is approximately 30 feet. Note that the operating range is dependent upon the cellular phone being used and battery level of the phone.

With Bluetooth® technology customers can experience hands-free calling as their Bluetooth® capable cellular phones are wirelessly connected to the vehicle. It will allow customers to place and receive calls using the steering wheel controls and voice recognition. The vehicle audio system will allow you to listen to your call through the vehicle speakers and adjust volume through steering wheel or radio controls.

Not all Bluetooth® cellular phones are guaranteed to work with the vehicle's Bluetooth® system. Based on the cellular phone's service provider and the manufacturer's implementation of Bluetooth®, not all phones support all available Bluetooth® functionality. Bluetooth® enabled cellular phones will be tested for vehicle compatibility and a feature compatibility list will be provided via the GM Bluetooth® website: http://www.gm.com/vc/bluetooth/

Bluetooth® Features Supported

The following is a list of features supported by the Bluetooth® system. Note that not all devices will support all of the listed functions.

1. Automatic reconnection - highest priority phone will automatically be connected to vehicle when vehicle ignition is on
2. Hands-free dialing- via digits, redial, name tags (phone number saved to a nametag via voice recognition)
3. Answering a call
4. Ending a call
5. Mute a Call
6. Rejecting a call - ignore an incoming call
7. Call Waiting
8. Three-way Calling - initiated from hands-free system
9. Send Number During a Call - this is used when calling a menu-driven phone system
10. Transfer a Call - transfer call from vehicle to cellular phone and visa versa
11. Voice Pass-Thru - allow access to the voice recognition commands on the cellular phone

Pairing a Bluetooth® Cellular Phone to the Vehicle

In order to use hands-free calling, the cellular phone must be paired to the vehicle. Up to five devices can be paired to the vehicle at one time, but only one can be connected at any given time. To pair a phone, the customer must know how to operate the Bluetooth® functionality of their phone. The pairing process must only be done one time for each phone, unless that phone's information is deleted. For safety reasons, the pairing process is disabled while the vehicle is moving.

Once the Bluetooth® cellular phone has been paired with vehicle, it will automatically connect to the vehicle when the ignition is on and the device is on. When more than one paired phone is in the vehicle, the phone with the highest priority will be connected. If the cellular phone is in use while getting into the vehicle, the phone can be switched to hands-free mode with the press of a button. In addition, a call in progress can be transferred from the vehicle hands-free mode to the phone to continue the call as the customer exits the vehicle.

Complete pairing instructions are provided in the Vehicle Owners Manual.

Back-up Battery (If Equipped)

Certain OnStar® equipped vehicles may also be equipped with a back-up battery. The back-up battery is a non-rechargeable, lithium battery intended to provide an auxiliary power source for the telematics communication interface control module in the event where power from the main vehicle battery is lost.

The back-up battery is intended to have a limited life span of approximately 4 years and is designed to maintain an open circuit voltage between 16 V and 9 V throughout this period. This allows the battery to power the basic functions of the telematics communication interface control module for least one 200 second (5 minute) call at the end of the 4 year span, should the main vehicle battery be lost. In the case of a vehicle losing vehicle battery power, OnStar will switch over to the backup battery based on an internal algorithm. It will look for an air-bag deploy, or near-deploy, messages from the SDM. If there are no messages the OnStar module will stay wake for a few minutes longer and monitor the buttons in the mirror. If not pressed, the modules will power down and shut off completely.

The back-up battery is connected to the telematics communication interface control module through the back-up battery positive voltage circuit and back-up battery ground circuit and is protected from a short circuit by means of an internal fuse. In the event the back-up battery, battery positive voltage circuit is shorted to the back-up battery ground circuit or chassis ground, the fuse will open and render the back-up battery permanently inoperable. The status of the back-up battery and its associated wiring is monitored by the telematics communication interface control module.

Audio System Interface

When the OnStar® requires audio output, a serial data message is sent to the audio system to mute all radio functions and transmit OnStar® originated audio. The OnStar® audio is transmitted to the vehicle audio system by a dedicated signal circuit and a low reference circuit.

The audio system will mute and an audible ring will be heard though the speakers if the vehicle receives a call with the radio ON.

On some vehicles, the HVAC blower speed may be reduced when the OnStar® system is active to aid in reducing interior noise. When the system is no longer active, the blower speed will return to its previous setting.

OnStar® Sleep Cycle

The OnStar® system uses a unique sleep cycle to allow the system to receive cellular calls while the ignition is in the OFF position and retained accessory power mode has ended. This cycle enables the telematics communication interface control module to perform remote functions, such as door unlock, as commanded over the air by the OnStar® Call Center, and to continue to maintain an acceptable level of battery electrical drain.

The OnStar® system uses 4 states of readiness, depending upon the type of cellular market the vehicle is in when the ignition is put into the OFF state

1. High power
2. Low power
3. Sleep
4. Digital standby

The high power state is in effect whenever the ignition is in the ON or RUN position, or retained accessory power is enabled, and the OnStar® system is sending or receiving calls or when the system is performing a remote function.

The low power state is in effect when the OnStar® system is idle with the ignition in the ON or RUN position, or with retained accessory power enabled.

The sleep state is entered after the vehicle has been shut off and the retained accessory power has timed out while in an analog cellular area. At a predetermined time recorded within the telematics communication interface control module, the system re-enters the low power state to listen for a call from the OnStar® Call Center for 1 minute. After this interval, the system will again return to the sleep state for 9 minutes. If a call is sent during the 1 minute interval, the OnStar® system will receive the call and immediately go into the high power mode to perform any requested functions. If no call is received during the 1 minute interval, the system will go back into the sleep mode for another 9 minutes. This process will continue for up to 48 hours, after which the OnStar® system will turn off until the ignition is turned to the ON or RUN position.

The digital standby power state is entered after the vehicle has been shut off and the retained accessory power has timed out while in a digital cellular area. When in digital standby mode, the OnStar® module is able to perform all remote functions as commanded by an OnStar® advisor at any time, for a continuous 120 hours. After 120 hours, the OnStar® module will go into sleep mode until a wake up signal from the vehicle is seen by the telematics communication interface control module. If the OnStar module loses the digital cellular signal it will revert to analog mode and follow the standard sleep state (9 minutes OFF, 1 minute standby) based on the time of the GPS signals, this will continue until a digital cellular signal is again received.

If the OnStar® system loses battery power while the system is in a standby or sleep mode, the system will remain OFF until battery power is restored and the ignition is turned to the ON or RUN position.

Features

OnStar® Personal Calling

The hands free, OnStar® personal calling cellular phone feature is an additional feature of the OnStar® system. This feature is embedded within the telematics communication interface control module; however it must be activated by an OnStar® advisor. OnStar® personal calling operates similar to most hand held cellular phones in that the availability for its usage is based on minutes or units. The customer must have a current OnStar® subscription, as this feature cannot be utilized without it. To use OnStar® personal calling, the customer must also purchase units (minutes) as outlined in the owners guide provided with the OnStar® system. Units begin to deplete, 1 unit is equal to 1 minute, as the customer makes outbound phone calls, answers inbound phone calls, or while connected to the OnStar® virtual advisor. In addition, units may also have an expiration date, depending upon the type of units purchased.

Customers have the ability to store telephone numbers within the module, referenced by a nametag for the convenience of frequently dialed numbers. After storing a nametag, the user can dial this number by initiating the OnStar® personal calling feature, speaking the word "call," and repeating the nametag assigned.

Turn by Turn Navigation

Turn by Turn Navigation allows the driver to contact OnStar® to obtain directions for driving from a current location to a desired location. The Turn by Turn Navigation system stores your planned route and continually checks your position along that route, when you deviate from the planned route, the system will recognize this and prompt the driver with verbal prompts for how to proceed. The driver then responds verbally to direct the system to continue the current routing or to recalculate the route because of a missed turn.

Advisor Record Feature

The Advisor Record Feature allows the user to store any information given during a call with an OnStar® Advisor. Recording is activated by pressing the blue OnStar button during a call; pressing the button a second time stops the recording. The stored information can be played back by pressing the phone button on the three button assembly and using the voice command "Advisor Playback".

Deactivated OnStar® Accounts

In the event a customer has not renewed their OnStar® account after expiration or the account was never activated, OnStar® will make a discrete cellular call to the vehicle to deactivate the OnStar® system. Before taking this action, customers are notified that the OnStar® system in their vehicle will be deactivated unless they elect to renew the account. After the OnStar® account has been deactivated, customers will experience the following

1. The OnStar® status LED will not illuminate.
2. The OnStar® system will NOT attempt to connect to the OnStar® Call Center in the event of a collision or if the vehicle's front air bags deploy for any other reason.
3. An emergency button press will play a demo message indicating the service has been deactivated.
4. An OnStar® Call Center button press will connect the customer with a dedicated sales team who can sell an OnStar® subscription and reactivate the vehicle. Depending on the type of OnStar® hardware in the vehicle, the customer may first hear a demonstration message stating there is no current OnStar® subscription for the vehicle, and directing the customer what to do to activate services.
5. OnStar® personal calling will not be available, as this feature requires the customer to have a current OnStar® account. Attempts to use this feature may result in cellular connection failure messages and the inability to connect to the number dialed.

Certain vehicles that have never had an active OnStar® account, or that have been deactivated, may be unable to establish a connection with the OnStar® Call Center. When normal published diagnostic procedures do not indicate a possible cause for the no connect concern, the vehicle may have been deactivated. For deactivated vehicles, a no connect response should be considered normal operation. Further diagnosis and subsequent repair is only necessary should the customer elect to become an active OnStar® subscriber or renew the account subscription.

Antenna System

Multi-Band Antenna

The multi-band antenna is located on the roof of the vehicle. Keep this antenna clear of snow and ice build up for clear reception. If the vehicle has a sunroof, the performance of the system may be affected if the sunroof is open. Loading items onto the roof of the vehicle can interfere with the performance of the system, ensure the multi-band antenna is not obstructed.

The radio antenna is enabled when the radio is turned on. The radio provides battery voltage to the antenna using the center conductor of the antenna coaxial cable. This DC voltage does not affect the incoming radio signal. When a 12 V signal is seen by the antenna on the center conductor of the antenna coax, both AM and FM signals are amplified.

Radio Reception

AM/FM 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. Height of the broadcast antenna
4. Height of the receiving antenna
5. Obstacles between the tower and the receiver
6. Atmospheric conditions
7. What band (AM or FM) the station is broadcasting
8. Type of antenna and the ground plane

Radio Data System (RDS)

The RDS feature is available only on FM stations that broadcast RDS information. This system relies upon receiving specific information from these stations and only works when the information is available. While the radio is tuned to an FM-RDS station, the station name or call letters display. 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 that is not audible in the main audio program.

RDS functions will only work with FM broadcast stations that are broadcasting RDS data. Not all FM Broadcast stations broadcast RDS data or offer all of the RDS services.

The information displayed is dependent upon the information broadcast by the particular station. The information may vary greatly between stations. 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.

With RDS, the radio can do the following

1. Display text information such as: station identification, type of programming, and general information (artist and song title, station messages, call in phone numbers, etc.).
2. Seek to stations broadcasting the selected type of programming
3. Receive announcements concerning local and national emergencies
4. Receive alert warnings of local or national emergencies. When an alert announcement comes on the current radio station, ALERT! displays. You will hear the announcement, even if the volume is low or a CD is playing. If a CD is playing, play stops during the announcement. Alert announcements cannot be turned off. ALERT! is not affected by tests of the emergency broadcast system. This feature is not supported by all RDS stations.

Digital Radio Receiver (if equipped)

The XM satellite radio is integrated into the radio. 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. A service fee is required in order to receive the XM service.

Theft Deterrent

The radio theft deterrent system is intended to disable or limit radio functionality if incorrect vehicle information is received by the radio. The radio disables functionality if the VIN information received by the radio does not match the VIN information that has been learned by the radio. The radio receives this information via serial data. A possible cause of incorrect VIN info could be the radio was originally installed in another vehicle.

The radio has the following theft operating modes as part of the theft deterrent system

1. Normal Mode: The radio has learned a correct VIN sequence and the VIN information received via serial data matches the learned VIN sequence. In this mode the radio has full functionality.
2. No VIN Mode: The radio has not received or learned a correct VIN sequence. In this mode the radio has limited functionality.
3. Theft Detected Mode: The radio has learned a correct VIN sequence and the VIN information received via serial data does NOT match the learned VIN sequence. In this mode the radio may be disabled or have limited functionality. The radio display will indicate that theft protection is active.

OnStar ® (If equipped)

When OnStar is activated, a serial data message is sent to the radio that activates a software program. When the software begins its process, the fade goes to the front, Bass and Treble are set to the mid range, the outputs are mono, and the audio source is OnStar. OnStar takes priority over any other audio source. All of these actions are preset values stored in the radio.

For additional OnStar information, refer to OnStar Description and Operation .

Auxiliary Audio Input Jack

The infotainment system has a 3.5mm (1/8 in.) auxiliary audio input jack available on the face of the radio. This input interfaces internally with the radio, no external circuits are involved.

The infotainment system may also have an additional auxiliary audio input jack located in the instrument panel compartment. Audio signals from the device are sent to the radio from the auxiliary jack via the left, right, and common audio signal circuits.

When a portable audio playback device is connected to the auxiliary jack, an internal switch detects the connection and the radio will switch to AUX as the audio source.

1. When a device is first connected to the 3.5mm (1/8 in.) input jack the infotainment system automatically switches to that device. If an auxiliary device has already been connected, press the AUX or CD/AUX button to select the device.
2. Playback of an audio device that is connected to the 3.5mm jack can only be controlled using the controls on the device.
3. The volume control on the device may need to be adjusted to ensure sufficient playback volume through the infotainment system.

USB Port (if equipped)

The infotainment system may have a USB connector located in the instrument panel compartment. The USB connector interfaces directly with the radio. The USB connector supports both USB standards 1.1 and 2.0.

USB supported devices

1. USB Flash Sticks (Thumb Drives)
2. Portable USB Hard Drives
3. Portable Digital Media Players (iPOD®, ZUNE®, etc.)

Depending on the USB device, some devices may not be recognized, or some features/functions may not be able to be controlled with the radio controls. USB HUB devices are not supported.

Bluetooth ® (If Equipped)

Bluetooth ® wireless technology is a short-range communications technology intended to replace the cables connecting portable and/or fixed devices while maintaining high levels of security. The operating range of the signal is approximately 30 feet.

The available features and functions are determined by the type of device and the software within the devices being used. For a feature or function to operate, it must be supported in both devices.

The first connection between devices is established through a process called pairing. In order to pair two devices, a password (passkey) has to be exchanged between the two devices. One device will generate the password, the other device accepts the password to complete the process. Once the devices are paired, future connections between the devices will occur automatically when the devices are on and within range of each other.

The Bluetooth ® hardware is internal to the radio. The radio supports streaming of data (music, voice, information) from cellular phones and other mobile devices that support those features. The radio may also be capable of interfacing with cellular phones for hands-free features.

1. The device must be paired to the radio to use the available Bluetooth ® feature(s). The pairing process must only be performed once for each device, unless that device's information is deleted.
2. Up to five devices can be paired to the system, but only one can be connected at any given time.
3. Streaming Audio allows playing music from the mobile device wirelessly. Music stored on the mobile device can be viewed and controlled from the display.
4. To stream audio from a mobile device, the device must be unlocked, and any additional applications should be closed.

Refer to the vehicle owners manual, supplements, and the device manufacturers information for pairing instructions.

Steering Wheel Controls (If equipped)

Some audio functions are available using the steering wheel controls. The steering wheel controls duplicate the function of the primary controls available on the radio.

For additional information on steering wheel controls, refer to Steering Wheel Controls Description and Operation .

Speed Compensated Volume (If equipped)

With Speed Controlled Volume (SCV), the audio system will adjust automatically to make up for road and wind noise as you drive, by increasing the volume as vehicle speed increases. To use SCV, set the volume at the desired level, and then select either Low, Medium, or High. To turn SCV off, select the Off screen button.