Buick Regal: Symptoms - Cellular Communication

Note: The Following Steps Must Be Completed Before Using The Symptom Table.

1. Perform The Diagnostic System Check - Vehicle 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 (ue1 With Iob/io6) , Onstar Description And Operation (ui3) , Or Onstar Description And Operation (ue1 Without Iob/io6).

Visual/physical Inspection

• Inspect For Aftermarket Devices Which Could Affect The Operation Of The Radio/audio System.
• Inspect For 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.

Symptom List

Refer To The Applicable Procedure To Diagnose The Symptom:

• Bluetooth Malfunction (with IO5/IO6)
• Bluetooth Malfunction (without IO5/IO6)
• No Global Positioning System (GPS) Reception (without IO5/IO6)
• No Global Positioning System (GPS) Reception (IO5/IO6 without UE1)
• No Global Positioning System (GPS) Reception (IO5/IO6 with UE1)
• OnStar Microphone Malfunction (IO5/IO6/IOB)
• OnStar Microphone Malfunction (IOR/IOU/IOT/IOS)
• OnStar Audio Malfunction
• OnStar Button LED Malfunction
• OnStar Call Center Remote Function Requests Malfunction
• OnStar Button Malfunction
• Unable to Contact OnStar Call Center
• OnStar Voice Recognition Malfunction
• OnStar Steering Wheel Control Functions Malfunction

Symptoms - Entertainment

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

1. Perform the Diagnostic System Check - Vehicle 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 (IO6) , Radio/Audio System Description and Operation (IOB) , or Radio/Audio System Description and Operation (IOS/IOT/IOU).

Visual/Physical Inspection

• Inspect for aftermarket devices which could affect the operation of the Radio/Audio System. Refer to Checking Aftermarket Accessories.
• Inspect for 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.

Symptom List

Refer to the applicable procedure to diagnose the symptom:

Refer to the applicable procedure to diagnose the symptom:

• Application Malfunction
• Auxiliary Audio Input Malfunction (IO5/IO6), Auxiliary Audio Input Malfunction (IOB), or Auxiliary Audio Input Malfunction (IOR/IOS/IOT)
• Bluetooth Malfunction (with IO5/IO6) or Bluetooth Malfunction (without IO5/IO6)
• Digital Radio Poor or No Reception
• No Global Positioning System (GPS) Reception (without IO5/IO6), No Global Positioning
• System (GPS) Reception (IO5/IO6 without UE1)No Global Positioning System (GPS) Reception (IO5/IO6 with UE1)
• Radio Controls Malfunction (IOB)
• Radio Information Display Malfunction (IOB), Radio Information Display Malfunction (IO5/IO6) or Radio Information Display Malfunction (IOR/IOS/IOT)
• Radio Poor Reception (IOB), Radio Poor Reception (IO6)Radio Poor Reception (IOR/IOS/IOT)
• Speaker Malfunction (UQ3 without NKC), Speaker Malfunction (UQ3 with NKC)Speaker
• Malfunction (UQA with IO5/IO6)Speaker Malfunction (UQA without IO5/IO6) Voice Recognition Malfunction (UE1) or Voice Recognition Malfunction (without UE1)

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