Audi - RSQ8 - Owners Manual - 2020 - 2023

Service Installation instructions AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/ NZL) for package number 4M8.092.115.A Audi Genuine Accessories Edition 01 Service Department. Technical Information Service Contents 1 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Safety instructions for pyrotechnical, electrical and mechanical components of the restraint system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 Storing, transporting and disposing of airbag, belt tensioner and battery disconnector units (pyrotechnic components) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Safety notes on the towing bracket – Fitting and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1 Notes on the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.2 Notes on the towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.3 Sensitivity to side winds: safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 Overview of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.1 Overview of mechanical components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.2 Overview of electrical system components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 Additional required parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Assembly overview and tightening torques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5.1 Towing bracket with cross member . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 7 Installing the towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7.1 Fitting the towing bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 8.1 Overview of the onboard supply retrofit wiring harness/socket retrofit wiring harness . . . . . . . . . . . . . 15 8.2 Installing the control unit bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8.3 Routing of socket retrofit wiring harness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 8.4 Connecting the retrofit wiring harness with the trailer detector control unit -J345- . . . . . . . . . . . . . . . . . 16 8.5 Detaching the relay and fuse holder on the left-hand side of the luggage compartment . . . . . . . . . . 17 8.6 Release the convenience system central control unit -J393- holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 8.7 Connecting the retrofit wiring harness CAN bus and brake light signal/terminal 15 to the convenience system central control unit -J393- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.7.1 Pin assignment on the convenience system central control unit -J393- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8.7.2 Integrating the CAN bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.7.3 Connecting the brake light signal/terminal 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 8.7.4 Install the convenience system central control unit -J393- into the holder -1- . . . . . . . . . . . . . . . . . . . . . . 22 8.8 Connecting the onboard supply retrofit wiring harness to the relay and fuse holder . . . . . . . . . . . . . . . 22 8.9 Establishing the power supply to the relay and fuse holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8.10 Installing the relay and fuse holder on the left-hand side of the luggage compartment . . . . . . . . . . . . 25 8.11 Retrofit wiring harness routing, onboard supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 9 Concluding operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9.1 Connecting the battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 18 All rights reserved. No reproduction without prior agreement from publisher. Copyright © 2020 Audi AG, Ingolstadt Printed in Germany Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 9.2 Adapting the trailer detector control unit -J345- coding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9.3 Function testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 9.4 Creating the opening required for the ball coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9.5 Reassembling the vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 9.6 Finishing the assembly work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 9.7 Adjusting the cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Contents 3 Service All rights reserved. No reproduction without prior agreement from publisher. Copyright © 2020 Audi AG, Ingolstadt Printed in Germany Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 1 General notes Please read and take note of these WARNING, Caution and Note descriptions before carrying out maintenance or repair work. WARNING Text with this symbol contains information concerning your safety and indicates potential accident and injury risks. Caution Text with this symbol indicates the risk of damage to your vehicle. Note Text with this symbol contains additional information. Caution Towing mode places increased demands on the cooling system. ◆ The cooling system must be adapted to the vehicle operating conditions ⇒ Page 33. Special tools are required for assembly. Improper installation can cause damage to the vehicle or the add-on parts. AUDI AG shall not accept responsibility in the event of failure to comply with these installation instructions. 1 General notes 1 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 2 Safety instructions for pyrotechnical, electrical and mechanical components of the restraint system 2.1 General safety instructions Pyrotechnical components comprise: ◆ Airbag units ◆ Belt tensioners ◆ Belt force limiters ◆ Battery disconnecting elements General ◆ Testing, installation and maintenance tasks must only be carried out by trained personnel. ◆ There are no replacement intervals for airbag units. ◆ Do not check using circuit tester, voltmeter, or ohmmeter under any circumstances. ◆ Pyrotechnic components must only be checked when installed and using ⇒ vehicle diagnostic testers that have been approved by the manufacturer. ◆ When working on pyrotechnic components and the airbag control unit -J234-, the battery earth wire must be disconnected when the IGNITION is SWITCHED ON. The battery negative terminal must subsequently be covered. ◆ You must wait ten seconds after the battery -A - has been disconnected. ◆ The battery -A - must be connected when the IGNITION is SWITCHED ON. There must not be anybody inside the vehicle during this process. Exception: vehicles with battery -Alocated inside the vehicle. Do not sit within the airbag and seat belt deployment range. ◆ Observe the appropriate steps after connecting the battery -A -⇒ Page 27. ◆ Before performing any work on pyrotechnic components in the restraint system, e.g. before disconnecting the electrical connector, the mechanic carrying out the task must discharge any static electricity. Electrostatic discharging can be performed by touching earthed metal parts, e.g. by briefly touching the door striker plate. ◆ Wash hands after touching ignited pyrotechnical components of the restraint system. ◆ Pyrotechnical components must neither be opened nor repaired. New parts must always be used (risk of injury). ◆ Pyrotechnic components that have fallen onto a hard surface or that show any sign of damage must not be installed. 2 2 Safety instructions for pyrotechnical, electrical and mechanical components of the restraint system Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 ◆ Pyrotechnic components must be installed immediately after they are removed from the transport container. ◆ If work is interrupted, the pyrotechnic component must be returned to the transport container. ◆ Pyrotechnic components must not be left unattended. ◆ When connecting the pyrotechnic components in the restraint system, only the person performing the work may be inside the vehicle. ◆ Pyrotechnic components must not be treated with grease, cleaning agents or similar products. ◆ If the fabric becomes contaminated with substances such as oil, grease, paint, colour or solvents, the airbag unit must be replaced. ◆ In addition, pyrotechnic components must not be exposed to temperatures above 100°C, even for short periods. 2.2 Storing, transporting and disposing of airbag, belt tensioner and battery disconnector units (pyrotechnic components) ◆ Storage is subject to the applicable national legislation. ◆ Transportation is subject to national and international laws governing packaging, naming, labelling and accompanying documentation. ◆ Pyrotechnic components that have not been ignited must be returned in the original packaging for appropriate recycling in line with the applicable national legislation! Contact your importer if you have any questions. ◆ Only pyrotechnic components that have been completely ignited may be disposed of as industrial waste. WARNING This does not apply for belt tensioners that operate according to the Wankel tensioner principle. Tensioners of this kind should be handled in the same way as pyrotechnic components that have not been ignited (e.g. airbags). Background: For belt tensioners that operate according to the Wankel tensioner principle, it is not possible to check whether all ignition stages have completed using workshop tools. 2 Safety instructions for pyrotechnical, electrical and mechanical components of the restraint system 3 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 3 Safety notes on the towing bracket – Fitting and operation 3.1 Notes on the towing vehicle Manufacturer: AUDI AG Model: Q8 2019 ► Offic. Type designation: 4M Maximum trailer weight or trailer drawbar load in kg, as specified by the manufacturer for the above-named vehicle model: ⇒ Vehicle registration certificate/Owner's Manual. 3.2 Notes on the towing bracket Technical data Westfalia: 305 491 Maximum trailer weight: 3500 kg Permitted trailer drawbar load: 350 kg Please see your vehicle documents for your maximum trailer weight. WARNING Do not exceed the maximum trailer weight and the permitted trailer drawbar load – risk of accident! The towing bracket is intended for towing trailers fitted with a tow ball and for operating carriers suitable for mounting to the coupling ball. Nationally applicable regulations must be adhered to in EU and non-EU countries. Improper use is prohibited. Use is only permitted under favourable road conditions and must be adapted to road conditions. Refer to the vehicle owner's manual and observe the possibly increased tyre inflation pressures for vehicles with towing brackets or vehicles towing a trailer. Assembly 4 3 Safety notes on the towing bracket – Fitting and operation Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 WARNING For safety reasons, the towing bracket must only be fitted by skilled personnel – risk of accident! ◆ If replacement parts are required, these must only be installed by skilled personnel and to undamaged genuine parts – risk of accident! ◆ Installation must be in line with AUDI AG/Volkswagen AG guidelines – risk of accident! ◆ Modification of the towing bracket is prohibited. This will invalidate the type approval – risk of accident and legal implications! ◆ Use of the mounting points approved as standard by the vehicle manufacturer is mandatory – risk of accident! Operation WARNING Vehicle handling is affected by the use of towing mode; increased driver awareness is required – risk of accident! ◆ Read the notes in the “Towing mode” chapter of the ⇒ Owner's Manual – risk of accident! ◆ If you are using trailer stabilisers, the coupling ball must be free from grease. Read and observe the notes in the relevant Owner's Manuals – risk of accident! The diameter of the ball coupling must be checked at regular intervals. Caution The ball coupling must always be kept clean. Note ◆ The towing bracket including all assembly parts weighs approx. 26 kg. ◆ Please note that the kerb weight of your vehicle will increase by this amount once the towing bracket is fitted. ◆ Please make sure that you do not exceed the gross vehicle weight rating for your vehicle. 3 Safety notes on the towing bracket – Fitting and operation 5 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 3.3 Sensitivity to side winds: safety instructions WARNING The load affects driving and braking behaviour and the vehicle's sensitivity to side winds. Adapt your driving style accordingly – risk of accident! When driving in strong side winds, make sure that you take extra care: ◆ When moving into and out of the slipstreams of lorries, ◆ When driving past hedgerows, trees, walls and buildings as well as any other wind barriers, ◆ When driving over bridges. 6 3 Safety notes on the towing bracket – Fitting and operation Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 4 Overview of components 4.1 Overview of mechanical components 1 - Electrical connection q Retrofit wiring harness, “socket” 2 - Towing bracket with cross member including "socket" wiring harness 3 - Bolts q 8 unit q M12 x 90 4 - Foam section q Right 5 - Foam section q Left Also included in the set: For the Q8 basic: frame 4M8.807.941.B. 4 Overview of components 7 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 For the Q8 S line: frame 4M8.807.941.E. Additionally required component that is not included in the kit, which must be ordered via ETKA depending on the equipment variant: Rear lid power opening sender cable. 4.2 Overview of electrical system components 1 - Onboard supply retrofit wiring harness 2 - PE bag q 1x Note Attached to the onboard supply wiring harness. Contents q Socket housing with 3 compartments (1x), black q Socket housing with 3 compartments (1x), white 3 - Cable ties q 10x 4 - Fitting trailer detector control unit -J3455 - Fuses q 2x 15 A q 2x 25 A 6 - Safety instructions 7 - Activation document 8 - "Electric brake for trailer not connected" sticker 8 4 Overview of components Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 4.3 Additional required parts Holder -1- 4M8.907.297.A ⇒ Electronic parts catalogue ETKA 4 Overview of components 9 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 5 Assembly overview and tightening torques 5.1 Towing bracket with cross member 1 - Towing bracket with cross member 2 - Securing bolt q 8 unit q M12 x 90 q 110 Nm q Replace after removal 3 - Foam section q Right 4 - Foam section q Left 10 5 Assembly overview and tightening torques Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 6 Preparations Required special tools, testing instruments, measuring instruments and auxiliary devices ◆ Torque wrench -V.A.G 1410- ◆ Torque wrench -V.A.G 1332- ◆ Removal lever -80 - 200- ◆ Wedge -3409- 6 Preparations 11 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Disconnect the battery ⇒ Electrical system; Rep. gr. 27; Battery; Disconnecting and connecting the battery – Remove the rear bumper ⇒ Rear bumper; Rep. gr. 63; Removing and installing the rear bumper – Remove the rear impact damper ⇒ Rear bumper; Rep. gr. 63; Removing and installing the rear bumper – Remove the luggage compartment floor ⇒ Trims, insulation; Rep. gr. 70; Removing and installing the luggage compartment floor cover – Remove the rear cross panel trim ⇒ Trims, insulation; Rep. gr. 70; Removing and installing the rear cross panel trim – Remove the luggage compartment side trim ⇒ Trims, insulation; Rep. gr. 70; Removing and installing the luggage compartment side trim Only on vehicles with digital sound packages – Remove the digital sound package control unit ⇒ Communication; Rep. gr. 91; Removing and installing the digital sound package control unit 12 6 Preparations Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 7 Installing the towing bracket 7.1 Fitting the towing bracket Installing the towing bracket Note ◆ When positioning the towing bracket, make sure that the cable -2- is routed over the cross member -1-. ◆ The contact surface areas between the towing bracket and vehicle must be cleaned. If necessary, treat bare metal body parts with anti-rust paint. – Position the cross member -1- on the ends of the frame with the help of a second technician. Caution Make sure that the towing bracket with cross member is handled and transported correctly. Only transport the towing bracket on cross member -1-. The ball coupling -2must not be placed under load in the resting position. – Insert the left and right bolts -3- for securing the cross member -1- and tighten the bolts by hand. – Align the towing bracket retaining plate -2- over the bolt holes (centrally) -arrows-. – Tighten the bolts -3- for towing brackets with cross members ⇒ Page 10 WARNING Securing bolts must only be used once. – Remove sealing cap -1- from the opening in the body. Note The cap -1- is no longer required once the towing bracket has been mounted. 7 Installing the towing bracket 13 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Guide the "socket/swing motor" retrofit wiring harness through the opening in the body and insert grommet -2-. Note When guiding the wiring through the body, make sure that the electrical connector retaining clip is in the -unlocked- position. – Secure the retrofit wiring harness using the retaining clips -1-. – Lay the socket retrofit wiring harness along the standard wiring harness to the trailer detector control unit -J345-. – Clamp the foam sections onto the left-hand and right-hand retaining plates. 14 7 Installing the towing bracket Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8 Electrical connection Applies only to vehicles with 1D0. On vehicles with preparation for towing bracket 1D8, only the power cables on the onboard supply side need to be connected to the trailer detector control unit -J345- 8.1 Overview of the onboard supply retrofit wiring harness/socket retrofit wiring harness 1 - Fitting trailer detector control unit -J345Note Magnified view shows the rear view to depict the exact installation position. 2 - Earth stud q Luggage compartment, left q 9 Nm 3 - Onboard supply wiring harness q On the vehicle 4 - Convenience system central control unit -J3935 - Relay and fuse holder -SJ- in the centre of the luggage compartment 6 - Retrofit electrical socket wiring harness 7 - Bracket for trailer detector control unit -J345- 8 Electrical connection 15 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.2 Installing the control unit bracket Bracket -2- must also be installed in vehicles without a control unit bracket in the left-hand side of the luggage compartment. Additional required parts: – Insert the holder -2- into the retaining position -1-. 8.3 Routing of socket retrofit wiring harness – Connect electrical connector -1- to the trailer detector control unit -J345- and lock. – Establish the earth connection for the "socket" retrofit wiring harness on earth stud -2-. – Fasten the socket retrofit wiring harness -3- to the standard wiring harness using cable ties. Note The nut on earth stud -2- is only screwed in once the onboard supply retrofit wiring harness has been routed. 8.4 Connecting the retrofit wiring harness with the trailer detector control unit -J345- – Plug in the retrofit wiring harness for the CAN bus and brake light signal/terminal 15 on the trailer detector control unit -J345- -1- with the connectors -2 and 3- until it clicks into place. Note Magnified view shows the rear view to depict the exact installation position. – Insert the trailer detector control unit -J345- -1- with connected connectors in the control unit bracket -4- and engage. 16 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.5 Detaching the relay and fuse holder on the left-hand side of the luggage compartment – Unlock retaining clips -3- and slightly detach the relay and fuse holder -1-. – Pull the relay and fuse holder -1- from the guides -2- and put them to one side. The electrical wiring remains connected. 8.6 Release the convenience system central control unit -J393- holder – Loosen and remove securing nuts -3-. – Remove the holder -1- together with the convenience system central control unit -J393- -4- upwards out of the guides -2-. – Remove the convenience system central control unit -J393-4- from the holder -1-. The electrical wiring remains connected. 8 Electrical connection 17 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.7 Connecting the retrofit wiring harness CAN bus and brake light signal/ terminal 15 to the convenience system central control unit -J393- 8.7.1 Pin assignment on the convenience system central control unit -J3931 - Convenience system central control unit -J393A - 17-pin connector, brown B - 32-pin connector, black C - 17-pin connector, black D - 20-pin connector, black E - 32-pin connector, blue 8.7.2 Integrating the CAN bus – Release the blue connector -E- from the convenience system central control unit -J393- and disconnect. 18 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Release the catches on the blue connector housing -in the direction of arrow A- and pull the connector block out of the connector housing -in the direction of arrow B-. – Unpin contact from compartment -1- of the connector block. – Unpin contact from compartment -2- of the connector block. – Pin contact 1 of the connector block into compartment -1- of the included black socket housing -A- (3 chambers). – Pin contact 2 of the connector block into compartment -3- of the included black socket housing -A- (3 chambers). – Pin the corresponding contacts of the onboard supply retrofit wiring harness (Y-wires) into the compartments on the connector block. – Pin the -orange/brown- wire of the retrofit wiring harness into compartment -1- of the connector block (CAN bus Low). – Pin the -orange/green- wire of the retrofit wiring harness into compartment -2- of the connector block (CAN bus High). – Insert the connector block into the blue connector housing and click into place. 8 Electrical connection 19 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Connect the socket housing (black) with the corresponding black connector on the onboard supply retrofit wiring harness -arrow-. – Connect the blue connector to the convenience system central control unit -J393- and lock. 8.7.3 Connecting the brake light signal/terminal 15 – Release and disconnect the black -B- 32-pin connector from the convenience system central control unit -J393-. – Release the catches on the black connector housing -in the direction of arrow A- and pull the connector block out of the connector housing -in the direction of arrow B-. 20 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Unpin contact from compartment -12- of the connector block. – Unpin contact from compartment -17- of the connector block. – Pin contact 12 of the connector block into compartment -3of the included white socket housing -A- (3 chambers). – Pin contact 17 of the connector block into compartment -1of the included white socket housing -A- (3 chambers). – Pin the corresponding contacts of the onboard supply retrofit wiring harness (Y-wires) into the compartments on the connector block. – Pin the -black/red- wire from the retrofit wiring harness into compartment -12- of the connector block. – Pin the -black- wire from the retrofit wiring harness into compartment -17- of the connector block. – Insert the connector block into the black connector housing and click into place. – Connect the socket housing (white) with the corresponding white connector on the onboard supply retrofit wiring harness -arrow-. – Connect the black connector to the convenience system central control unit -J393- and lock. 8 Electrical connection 21 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.7.4 Install the convenience system central control unit -J393- into the holder -1– Reinstall the convenience system central control unit -J393-4- into the holder -1-. – Insert holder -1- along with the convenience system central control unit -J393- into the guides -2-. Note Route electrical wiring in such a way that the original wiring routing is restored. – Position and tighten securing nuts -3-. – Tightening torque for the securing nuts -3- is 3 Nm. 8.8 Connecting the onboard supply retrofit wiring harness to the relay and fuse holder Special tools and workshop equipment required ◆ Set of unpinning tools -VAS 1978/35- 22 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.9 Establishing the power supply to the relay and fuse holder – Release the retaining tab -arrow- and take out fuse carrier B -2- from the relay and fuse holder -SJ- -1- in a downwards direction. – Release the retaining clips -in the direction of arrow A- and remove the cover from fuse carrier B -in the direction of arrow B-. – Pull out the retaining strip -1- for the electrical connectors -in the direction of the arrow-. 8 Electrical connection 23 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Unlock the retainer from fuse carrier B -2-in the direction of arrow A- and remove -in the direction of arrow B-. – Plug the onboard supply retrofit wiring harness contacts into fuse positions -5 and 7 to 9- on fuse carrier B -2-. ◆ Compartment 9a: red wire ◆ Compartment 8a: red/blue wire ◆ Compartment 7a: red/green wire ◆ Compartment 5a: red/black wire – Insert the electrical connector retaining strip. – Connect fuses 5, 7, 8 and 9. ◆ Fuse 9: 15 A ◆ Fuse 8: 25 A ◆ Fuse 7: 15 A ◆ Fuse 5: 25 A – Install the retainer on fuse carrier B -2- and lock. – Install the cover for fuse carrier B -2- and lock. – Insert fuse carrier B -2- into the relay and fuse holder -1- and click into place. Note Route electrical wiring in such a way that the original wiring routing is restored. 24 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Secure the onboard supply retrofit wiring harness to the vehicle's wiring harness using cable ties -arrow-. – The wires must be secured with cable ties in a manner that prevents slipping or abrasion. – Reinstall the relay and fuse holder. 8.10 Installing the relay and fuse holder on the left-hand side of the luggage compartment Installation is carried out in reverse order. Please note the following points: – Route electrical wiring in such a way that the original wiring routing is restored. 8 Electrical connection 25 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 8.11 Retrofit wiring harness routing, onboard supply – Route the onboard supply retrofit wiring harness from the trailer detector control unit -J345- -2- along the vehicle's wiring harness to the relay and fuse holder and fix in place using cable ties -arrow-. – Attach the free earth wires of the retrofit wiring harness to the earth point -4- and tighten to the tightening torque ⇒ Page 15. Brake booster wiring – Connect the electrical connector -1- of the "onboard supply" wiring harness to the corresponding connector of the "socket" retrofit wiring harness -arrow-. 26 8 Electrical connection Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 9 Concluding operations 9.1 Connecting the battery – Workshop Manual⇒ Electrical system; Rep. gr. 27; Disconnecting and connecting the battery Note After reconnecting the power supply, the ESP warning light can only extinguish after a few metres have been driven. 9.2 Adapting the trailer detector control unit -J345- coding Coding is adjusted using the ⇒ Vehicle diagnostic tester. This must be connected online. 9.3 Function testing – Check that the trailer socket -U10- functions correctly using the trailer socket tester -VAS 5800- or a trailer. Pin assignment in the trailer socket -U10-. 1 - Terminal LTS (left turn signal) 2 - Terminal RFL (rear fog light) 3 - Terminal 31 (earth) earth for terminals 1–2, 4–8 4 - Terminal RTS (right turn signal) 5 - Terminal 58 R (right tail light) 6 - Terminal 54 (brake light) 7 - Terminal 58 L (brake booster) 8 - Terminal RVL (reversing light) 9 - Terminal 30 (battery "+ ") max. current 15 A 10 - Terminal 15 (charging cable) max. current 15 A 11 - Terminal 31 (earth) earth for terminal 10 12 - Terminal 31 (earth) earth for terminal 7 13 - Terminal 31 (earth) earth for terminal 9 9 Concluding operations 27 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 9.4 Creating the opening required for the ball coupling Applies to the Audi Q8, SQ8 and RSQ8 models without the rear lid power opening sender cable – Cut out the bumper cover diffuser -2- along the pre-defined marking -1- using a suitable tool. – Carefully deburr the cut edges. Applies to the Audi Q8 basic model with the rear lid power opening sender cable: Diffuser adjustment without opening for towing bracket with bracket 4M8.807.941.B for rear lid power opening control unit -J938-. – Remove the rear lid power opening sender cable and the rear lid power opening control unit. A - Mark the position of the bracket -2- on the diffuser -1- on the left-hand and right-hand side using a white pen -magnifying glass-. B - Loosen the bracket -2- from the diffuser -1- with a plastic wedge -3- -direction of arrow-. – Position and align the new bracket -2- on the positions -3and -4- of the diffuser -1-. – With a white pen, copy the outline -5- of the bracket -2- onto the diffuser -1-. 28 9 Concluding operations Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Remove the bracket and mark out the outline of the entire circumference of the -white line- 2 mm from the line -red line-. – Cut out the diffuser along the -red line- and deburr the cut edges. – Place the bracket on the diffuser and check that the opening is a perfect match; if necessary, rework the opening! ◆ The diffuser and bracket must be at room temperature. – Clean the bonding surfaces of the bumper using isopropanol. ◆ Airing time is 5 min. – The bonding surfaces of the bumper must be completely dry, clean and free of wax and grease. – Spray the bonding surfaces of the bumper with primer D 822 150 A1. ◆ Airing time is 30 min. – Remove the protective film from the adhesive tape -6- all over the bracket -2-. – Insert the bracket -2- into the opening on the diffuser -1- and press down on marks -3 and 4-. ◆ Leave the vehicle at room temperature for a minimum of 1 hour. ◆ Load-bearing after at least 24 hours. 9 Concluding operations 29 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Install the rear lid power opening control unit -2-. – Install the rear lid power opening sender cable -3- with the two individual aerials -1 and 4-. See ETKA! WARNING The connector for the rear lid power opening sender -3- is plugged into position -B- on control unit -2-, with the locating element ensuring the correct orientation. The two aerial wires -1 and 4- cross over at the connector -3 magnifying glass-. Note the correct installation position and routing! The upper connector outlet belongs to the individual aerial -4-. This must be routed in the lower area of the opening in the holder -5-. The lower connector outlet belongs to the individual aerial -1-. This must be routed in the upper area of the opening in the holder -5-. – Connect the rear lid power opening control unit to the onboard supply connector -2- via position -A-. Applies to the Audi Q8 S line, SQ8 and RSQ8 models with rear lid power opening sender cable: Diffuser adjustment without opening for towing bracket with bracket 4M8.807.941.E for rear lid power opening control unit -J938-. – Remove the rear lid power opening sender cable and the rear lid power opening control unit. A - Mark the position of the bracket -2- on the diffuser -1- on the left-hand and right-hand side using a white pen -magnifying glass-. B - Loosen the bracket -2- from the diffuser -1- with a plastic wedge -3- -direction of arrow-. 30 9 Concluding operations Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Position and align the new bracket -2- on the positions -3and -4- of the diffuser -1-. – With a white pen, copy the outline -5- of the bracket -2- onto the diffuser -1-. – Remove the bracket and mark out the outline of the entire circumference of the -white line- 2 mm from the line -red line-. – Cut out the diffuser along the -red line- and deburr the cut edges. – Place the bracket on the diffuser and check that the opening is a perfect match; if necessary, rework the opening! ◆ The diffuser and bracket must be at room temperature. – Clean the bonding surfaces of the bumper using isopropanol. ◆ Airing time is 5 min. – The bonding surfaces of the bumper must be completely dry, clean and free of wax and grease. – Spray the bonding surfaces of the bumper with primer D 822 150 A1. ◆ Airing time is 30 min. 9 Concluding operations 31 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 – Remove the protective film from the adhesive tape -6- all over the bracket -2-. – Insert the bracket -2- into the opening on the diffuser -1- and press down on marks -3 and 4-. ◆ Leave the vehicle at room temperature for a minimum of 1 hour. ◆ Load-bearing after at least 24 hours. – Install the rear lid power opening control unit -2-. – Install the rear lid power opening sender cable -3- with the two individual aerials -1 and 4-. See ETKA! WARNING The connector for the rear lid power opening sender -3- is plugged into position -B- on control unit -2-, with the locating element ensuring the correct orientation. The two aerial wires -1 and 4- cross over at the connector -3 magnifying glass-. Note the correct installation position and routing! The upper connector outlet belongs to the individual aerial -4-. This must be routed in the lower area next to the opening in the holder -5-. The lower connector outlet belongs to the individual aerial -1-. This must be routed in the upper area next to opening in the holder -5-. – Connect the rear lid power opening control unit to the onboard supply connector -2- via position -A-. 32 9 Concluding operations Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 9.5 Reassembling the vehicle The vehicle is assembled in the reverse order. Read and observe the notes on installation for the relevant components and the corresponding tightening torques. On vehicles with lane change assist, this must be recalibrated. WARNING The following information must be observed when working with the lane change assist (Audi side assist): ◆ If the rear bumper cover is removed and then reinstalled, or if any modifications are made to the rear bumper cover, the lane change assist system (Audi side assist) must be recalibrated ⇒ Electrical system; Rep. gr. 96; Risk of accident due to malfunction! With regard to vehicles fitted with a rear view camera, observe the following: ◆ If the rear bumper cover is removed and then reinstalled, or if any modifications are made to the rear bumper cover, the rear view camera system must be calibrated ⇒ Electrical system; Rep. gr. 91; Calibrate the rear view camera system! 9.6 Finishing the assembly work – Attach the enclosed sticker with the warning message "Electric brake for trailer not connected" to a clean surface in an easily visible position near the decal (ball position) or the dash panel. Note Bonding surfaces must be dry and free of dust and grease! – Once assembled, check the towing bracket functions correctly ⇒ Owner's Manual. – Keep these assembly instructions with the vehicle documents so that they can be presented to authorised persons upon request. 9.7 Adjusting the cooling system As towing mode puts greater demands on the engine cooling system, the cooling system is upgraded – where technically possible – when the towing bracket is installed in the factory. The cooling system does not need to be upgraded if it is possible to guarantee that the engine is only ever exposed to the following conditions: ◆ The weight of the combination falls below the permissible gross combination weight rating ◆ No high ambient temperatures ◆ No long, steep inclines 9 Concluding operations 33 Installation instructions - AUDI Q8 2019 ► AUDI SQ8 2020 ► AUDI RSQ8 2020 ► Electrics set for towing bracket (AUS/NZL) Edition 01 ◆ No high altitude journeys In any case, the coolant temperature display must be carefully monitored. If the needle in the display moves into the hot area, the speed must be reduced immediately. A cool-down time must also be allowed for if necessary. This involves the allowing the engine to idle for approx. 2 minutes to prevent a build-up of heat. 34 9 Concluding operations