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Technical Service Bulletin

Topic 97 Air conditioner does not cool the interior

Market area United States 444 Volkswagen of America, Inc. (6444)
Brand Audi

Transaction No. |2079080/1

Level EH

Status Released for publishing

Release date Aug 27, 2025

Diagnostic trouble codes

Diagnostic address Diagnostic trouble code Fault symptom | Storage state
0008 - HVAC electronics B148812: A/C clutch Short circuit to B+ Intermittent
00C5 - Thermal management |B148812: A/C clutch Short circuit to B+ Intermittent
0008 - HVAC electronics B148815: A/C clutch open circuit/short circuit to B+ Intermittent
00C5 - Thermal management | B148815: A/C clutch open circuit/short circuit to B+ Intermittent
New customer code

Object of complaint Complaint type Position

climate control -> heating, cooling -> climate control unit cooling output

functionality -> no function

Vehicle data

Audi Q5

Sales types

Type|MY |Brand| Designation | Engine code | Gearbox code | Final drive code
GU* |2025|/A DXCA * *
Documents

Document name

master.xml

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Technical Service Bulletin Transaction No.: 2079080/1
97 Air conditioner does not cool the interior Release date: Aug 27, 2025
Condition
Customer states:

The air conditioning does not cool the interior.

Workshop findings:

The following event memory entries are logged (passive/intermittent) in the thermal management control unit
(diagnostic address 005C) and/or in the control unit for air conditioner and heater electronics (diagnostic address
0008):

* 8148812 - A/C clutch short circuit to B+.
* 6148815 - A/C clutch open/short circuit to B+.

Technical Background

On vehicles manufactured within a specific period, the wiring for N280 (brown connector for N25) (air conditioning
system magnetic clutch) is too short.

Production Solution

Longer wiring has been in use since July 17, 2025.

Service
The complaint can be reproduced. A discrepancy is found at the wire leading to the brown connector (N25) on N280.
Repair the damaged wire using wiring harness repair set VAS 1978 B/C.

Place the crimp connector in the position marked with the red arrow (refer to Figure 1).

Figure 1. The position for the crimp connector is marked with the red arrow.

The length of the wire between the cable tie and the brown connector (yellow arrow in Figure 1) must be
60mm (refer to Figure 2). This ensures that the wire is not too short again.

Wrap the repaired wire in fabric adhesive tape N10649702 almost as far as the connector so that it overlaps (refer to
Figure 2).

Wrap the fabric adhesive tape at least 2.5 times underneath the area of the cable tie of the omega clip to ensure the
wire can be secured in the cable tie.

Figure 2. Connector in its repaired state.
When billing, please always attach photos that clearly show the complaint to DOC-IT. To ensure a reference to the
vehicle, the image/video must:

° Include the VIN and date.
* Must not be edited.

* Should be in focus and taken with sufficient light. A high resolution is not necessary.

If appropriate, please mark the location of the problem so that parts analysis has a clear reference to the complaint.
Please ensure that the photo documentation does not show any people and/or face, license plates, or customer
data.

Warranty
Claim Type: ¢ — If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Service Number: 9712
Damage Code: 0029
Labor Operations: Remove and install noise insulation 1082 1900 See SRT with
associated operations
Repair wiring harness 9709 4151 See SRT with
associated operations
Modify wiring harness 9712 4199 5TU
GFF / Guided Functions 0150 0060 Labor according to the
diagnostic log
Claim Comment: As per TSB 2079080/1

All warranty claims 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

Designation Part number Quantity
Fabric tape N10649702 0.3
Omega clip N10760401 1

Crimp connector | 000979940 1

Wire 000979025EC 1

Additional Information
All parts and service references provided in this TSB (2079080) are subject to change and/or removal.

©2025 Audi of America, Inc. All rights reserved. The information contained in this document is based on the latest
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