2021-2023 Audi Q7/SQ7 Radiator Fan & Wiper Malfunction

Audi Technical Service Bulletin (TSB) 2073305/1, also identified as 97 24 07, addresses electrical malfunctions affecting the radiator fans, windshield wipers, and alarm system in 2021-2023 Audi Q7 and SQ7 models. This TSB provides diagnostic information and a repair procedure for these issues, which are frequently linked to damaged wiring within the vehicle's plenum chamber. Owners experiencing a persistent "Audi Q7 radiator fan P048000" or related electrical problems should be aware of this bulletin.

Symptoms

Owners of affected 2021-2023 Audi Q7 and SQ7 vehicles may notice one or more of the following symptoms:

• "The radiator fans run constantly."
• "The windshield wipers do not work."
• Issues with the anti-theft alarm system.

Fault Codes / DTCs

When these issues occur, diagnostic trouble codes (DTCs) may be logged as static or intermittent in various control units. These codes help pinpoint the specific electrical problem:

Engine electronics J623 (address word 0001):

• P048000: Cooling Fan 1 Control Circuit
• P048100: Cooling Fan 2 Control Circuit
• P10EF00: Function limitation due to radiator fan failure
• U063200: Lost Communication With Fan 1
• U063300: Lost Communication With Fan 2

Electronic central electrics J519 (address word 0009):

• U10A300: Wiper Motor Control Module, no communication

Comfort module J393 (address word 0046):

• U10F300: Alarm horn for anti-theft warning system no communication

Technical Background

Audi has identified that on vehicles manufactured within a specific period, wire damage or chaffing can occur on circuits routed through the plenum chamber. This damage may not always be immediately visible and can sometimes only be detected under the harness wrapping. This wiring issue can lead to the symptoms and DTCs described, including the persistent "Audi Q7 radiator fan P048000" fault.

Important Notice

Repair Procedure Summary

Addressing these electrical issues, as outlined in TSB 2073305/1, involves inspecting and repairing the affected wiring harness. The general steps are:

1. Initial Circuit Check: Technicians will check the affected circuit for high resistance, open circuits, and short circuits using a Digital Volt-Ohm Meter (DVOM).
2. Locate Damage: The wiring harness in the plenum chamber will be carefully moved and flexed to help locate the specific area of concern where damage has occurred.
3. Wire Repair: Any affected wires are to be repaired using the specialized wiring harness repair set, VAS 1978 B.
4. Harness Wrapping: The repaired wiring harness must then be wrapped with fabric adhesive tape, part number N 10592002.
5. Wire Lengthening (if necessary): If the wire strands are not clean and shining, indicating corrosion or severe damage, the wire must be cut back and lengthened as needed to ensure a proper connection.

Required Tools and Parts

To perform the repair described in TSB 2073305/1, specific tools and parts are required:

• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual (See ETKA).
• Cloth adhesive tape: Part number N 10592002.
• Wire harness repair set: VAS 1978 B.
• VAS tester: VAS 6160 or VAS 6150, with the current version of ODIS (Windows 10).

Warranty Information

This repair is covered under warranty for up to 48 months or 50,000 miles, whichever comes first. For Audi Certified Pre-Owned (CPO) vehicles, the claim type is G10, requiring owner verification. If the vehicle is outside of any warranty, this Technical Service Bulletin is for informational purposes only. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual, with claims subject to review or audit by Audi Warranty. The service number for this bulletin is 9713, and the damage code is 0015.

Source: NHTSA ID 10251663, TSB 2073305/1.