91 MMI: BLUETOOTH Does Not Work (Adaption Channel Deactivated) (GROUP 91, NO. 24-43)

91 MMI: BLUETOOTH DOES NOT WORK (ADAPTION CHANNEL DEACTIVATED)

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

91 24 43 2074929/1 August 29, 2024.

Model(s)	Year	VIN Range	Vehicle-Specific Equipment
All Audi Vehicles	2009 - 2021	All	Audi models prior to MIB3 with hands-free

CONDITION

Customer states: 

• The customer's cell phone or the fixed handset (only possible with PR# 9ZW) cannot be connected to the vehicle via Bluetooth.

And/or 

• After replacing the control unit 1 for information electronics or performing a software update:

• The vehicle's Bluetooth function is deactivated and cannot be switched on via the menu. It is not possible to connect a mobile phone to the vehicle.
• The Bluetooth settings in the telephone menu are greyed out.
• The value "1" (Bluetooth is switched off) is logged in diagnostic address 5F - control unit 1 for information electronics (RMC) in measured value block 96/2 (Bluetooth status).

TECHNICAL BACKGROUND 1

• Vehicle delivered from factory with incorrect adaption of telephone control unit (diagnostic address 77)/control unit 1 for information electronics (diagnostic address 5F).

  OR 

• The "Replace control module" test plan was not used when the control unit was replaced.

  OR 

• The existing activations were not  restored after a software update.

PRODUCTION SOLUTION

• Continuous process optimization.

  OR 

• None, as the part replacement/update procedure wasn't followed properly.

SERVICE

If a mobile phone which has been tested for compatibility (see www.audi.com/bluetooth for list of phones that have been tested), or the fixed handset cannot be connected to the vehicle via Bluetooth, the adaption channel for Bluetooth must be checked. On vehicles with MIB, it must also be checked if the existing activations have been restored:

Vehicles with hands-free (CAN): 

Check adaption channel 133 of telephone control unit (diagnostic address 77). Adaption channel 133 must have the value "1"  .

Adaption channel 133: 

Value 0  = Bluetooth OFF 

Value 1  = Bluetooth ON 

In addition, adaption channel 134 must be checked and set to the desired value (factory setting: value 0).

Adaption channel 134: 

Value 0  = Bluetooth is always  active

Value 1  = Bluetooth is only  active when the mobile phone is in the charging cradle

Vehicles with hands-free (MOST) or rSAP Bluetooth with MMI2G: 

Check adaption channel 133 of telephone control unit (diagnostic address 77). Adaption channel 133 must have the value "1"  .

Adaption channel 133: 

Value 0  = Bluetooth OFF 

Value 1  = Bluetooth ON 

In addition, adaption channel 134 must be checked and set to the desired value (factory setting: value 0).

Adaption channel 134: 

Value 0  = Bluetooth is always  active

Value 1  = Bluetooth is only  active when the mobile phone is in the charging cradle

Vehicles with MMI3G or MMI3G+: 

Check adaption channel 17 of control unit 1 for information electronics (address word 5F). Adaption channel 17 must have the value "1"  .

Adaption channel 17: 

Value 0  = Bluetooth OFF 

Value 1  = Bluetooth ON 

Vehicles with RMC: 

Check adaption channel 09 of control unit 1 for information electronics (address word 5F). Adaption channel 09 must have the value "1"  . The value "0" (Bluetooth is switched on) is then logged in measured value block 96/2 (Bluetooth status).

Adaption channel 09: 

Value 0  = Bluetooth OFF 

Value 1  = Bluetooth ON 

Vehicles with MIB: 

Check adaption channel 51 of control unit 1 for information electronics (address word 5F). Adaption channel 51 must have the value "1"  .

Adaption channel 51: 

Value 0  = Bluetooth OFF 

Value 1  = Bluetooth ON 

If Bluetooth still does not work, restore the existing activations using the ODIS tester. Proceed as follows: "Special Functions" => "SVM Activations" => "Restore already existing activations"

WARRANTY

Claim Type:	If the vehicle is outside of any warranty, this Technical Service Bulletin is informational only.
Service Number:	9189 for vehicles with hands-free universal preparation for mobile telephone (address word 0077) 9196 for vehicles with control unit 1 for information electronics (address word 005F)
Damage Code:	AB39
Diagnostic Time:	GFF	0150 0010	See SRT with associated operations
	GFF	0150 0060	Time stated on the diagnostic protocol
Claim Comment:	As per TSB 2074929/1

All warranty submitted for payment must be in accordance with the Audi Warranty Policies and Procedures Manual  . Claims are subject to review or audit by Audi Warranty.

REQUIRED PARTS AND TOOLS

Parts replacement not permitted.

ADDITIONAL INFORMATION

All part and service references provided in this TSB (2074929)  are subject to change and/or removal. Always check with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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