2023-2024 Audi Q8 SAFE CP Cluster Warning TSB 2073601/4

Symptoms

Owners of various 2023-2024 Audi models may observe the message "SAFE CP" appearing in the instrument cluster. This warning is typically displayed alongside other various messages. This issue points to a problem with component protection or data integrity within the vehicle's electronic systems.

Fault Codes / DTCs

The "SAFE CP" message is associated with specific Diagnostic Trouble Codes (DTCs) that can be stored in various control units:

Code	Description	Affected Control Unit(s)	Diagnostic Address
U110100	"Component protection active"	Brake Electronics Control Unit	J104 (0003)
		Electronic Central Electrical (BCM)	J519 (0009)
		Airbag Control Unit	J234 (0015)
		Instrument Cluster	J285 (0017)
		Control Unit for Night Vision System	J853 (0084)
C115E54	"Inertial sensors no basic setting"	Airbag Control Unit	J234 (0015)
U111800	"Data set missing"	Chassis Control with Air Suspension	J775 (0074)

Technical Background

Audi has identified a software issue within the Comfort System Control Module (J393, diagnostic address 0046) as the root cause for the "SAFE CP" message and associated DTCs. This software anomaly can lead to component protection being active or data sets going missing, triggering the warnings. The new software version 0630 addresses this condition.

Repair Procedure Summary

To resolve the "SAFE CP" issue and clear the related DTCs, Audi Technical Service Bulletin 2073601/4 outlines a software update procedure for the Comfort System Control Module (J393). This TSB, revised on July 1, 2024, supersedes TSB Group 57 number 24-40 dated May 7, 2024, and replaces Pending Service Solution (PSS) TSB 2072587.

The process involves following the instructions detailed in TSB 2011732, which covers Software Version Management (SVM) operating procedures. Technicians will update the J393 module (diagnostic address 0046) using SVM action code 46A034. The update installs new software version 0630, replacing older versions like 0627 or 0628. This applies to models such as the A4, A5, Q7, Q8, and e-tron GT.

After the software update is complete, it is crucial to perform a bus sleep cycle. This is achieved by turning the key off and allowing the vehicle to sit for a few minutes, ensuring the module resets properly.

For vehicles that store DTC C115E54 ("Inertial sensors no basic setting") in the Airbag Control Unit (J234) after the update, technicians must perform basic settings for the inertial sensors. It is important to note that performing test plans for faults in the Chassis Control with Air Suspension (J774) is not necessary. Once these steps are completed, any remaining faults can be deleted.

Important Warnings

• Key Placement During Update: During the software update process, the vehicle's key must be placed on the emergency reader coil.
• Specific DTC U110100 Condition: This TSB 2073601/4 does not apply if the DTC U110100 ("Component protection active") is logged specifically in the Gateway (diagnostic address 0019) or the Comfort System Control Module (diagnostic address 0046). In such cases, further diagnosis beyond this bulletin may be required.

Warranty Information

This repair is covered under Audi's New Vehicle Limited Warranty for up to 48 months or 50,000 miles, whichever comes first. For Audi Certified Pre-Owned (CPO) vehicles, coverage falls under the G10 claim type, requiring owner verification. If the vehicle is outside of any applicable warranty, this Technical Service Bulletin serves as informational guidance only.

The service number for this procedure is 5789, with a damage code of 0039. Labor operations include software update (0151 0060, 0151 0010) and a vehicle check for data bus sleep mode (0689 0199). Claims should be submitted as per TSB 2073601/4.

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Source: NHTSA ID: 11005898