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Tahoe / Yukon Service Manual

Bluetooth Malfunction

Cellular, Entertainment, and Navigation | Diagnostic Information and Procedures | Document ID: 3460466 Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provide an overview of each diagnostic category. Circuit/System Description 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 Bluetooth ® hardware is internal to the radio. The radio supports interfacing with cellular phones for hands-free features. Refer to the vehicle owner manual, supplements, and the device manufacturer’s information for information on devices, control, operation. and pairing instructions. Diagnostic Aids Verify the mobile device is properly configured for the feature being used. Refer to the device manufacturer’s information. Verify the device has the latest software available. Refer to the device manufacturer’s information. Verify the function/feature that is being used is supported by the mobile device. 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. The system can store pairing information for multiple devices, certain radios can have up to two devices actively connected at any given time, refer to owners manual for further details. For features that require a cellular connection make sure to perform tests in an area where the customers device has a strong signal. Close all other applications running in the background on the phone. If issue persists unpair the phone in both the phone and radio settings, then start the pairing process over from the beginning. Before beginning testing, if available verify the customers device can pair with a like vehicle, meaning: Same year, same model, same radio RPO and same radio software level. Reference Information Schematic Reference Radio/Navigation System Schematics Connector End View Reference Master Electrical Component List Description and Operation Radio/Audio System Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification

  1. Verify no DTCs are present. ⇒ If any DTCs are present Refer to Diagnostic Trouble Code (DTC) List - Vehicle. ⇓ 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 a compatible mobile device. ⇒ If the infotainment system does not successfully pair with the compatible mobile device. 4.1. Perform the 3 vehicle Factory Resets located in Setting>System>Return to Factory Settings. 4.2. Verify the infotainment system successfully pairs with a compatible mobile device. ⇒ If the infotainment system does not successfully pair with a compatible mobile device. Replace the A11 Radio. ⇓ If the infotainment system successfully pairs with a compatible mobile device.
  5. Verify audio can be heard while streaming from the device. ⇒ If audio can be heard while streaming from the device but the audio is distorted. Refer to Speaker Malfunction ⇒ If audio can not be heard while streaming from the device Replace the A11 Radio. ⇓ If audio can be heard while streaming from the device.
  6. Verify the customers device can be paired with the infotainment system. ⇒ If the device can not be paired with the infotainment system. Perform a reset on the device. Refer to device manufacture’s information. ⇒ Verify the customers device can be paired with the infotainment system. If the device still will not pair inform the customer the issue is with the device. ⇓ If the device successfully pairs with the infotainment system.
  7. Verify audio can be heard while streaming from the device. ⇒ If audio can not be heard while streaming. Ensure the volume on the device is turned up to an adequate level. ⇓ If audio can be heard while streaming.
  8. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Control Module References for radio replacement, programming, and setup