2023-2025 Audi Cluster "SAFE CP" Warning with DTC U110100

Owners of various 2023-2025 Audi models may encounter a "SAFE CP" warning message in their instrument cluster. This warning is often accompanied by other messages and specific diagnostic trouble codes (DTCs), indicating a component protection issue. This technical service bulletin, 2073601/5, provides the necessary steps to diagnose and resolve this condition.

Symptoms

Owners will typically observe the message "SAFE CP" appearing in the instrument cluster. This warning may be displayed alongside other various messages, indicating a system malfunction.

Fault Codes / DTCs

When the "SAFE CP" warning appears, technicians may find one or more of the following diagnostic trouble codes (DTCs) stored in various control units:

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

Diagnosis and Trigger Conditions

The root cause of the Audi SAFE CP warning U110100 and associated DTCs is identified as a software issue within the Comfort System Control Module (J393), which has diagnostic address 0046. This software anomaly triggers the component protection active status and related fault codes.

Important Warnings

It is crucial to note that this Technical Service Bulletin does not apply if the DTC "U110100: component protection active" is logged specifically in the Gateway (diagnostic address 0019) and/or in the Comfort System Control Module (diagnostic address 0046). Technicians must verify the location of the DTC before proceeding with this TSB.

In some cases, after the software update is completed, the DTC "C115E54: Inertial sensors no basic setting" may still be stored statically in the Airbag Control Unit (-J234-, diagnostic address 0015). If this occurs, basic settings for the inertial sensors must be performed to make the faults passive. It is not necessary to perform test plans for faults in the Chassis Control with Air Suspension (-J774-, diagnostic address 0074). Once these steps are complete, all faults can be deleted.

Repair Procedure Summary

The repair for the Audi SAFE CP warning U110100 involves updating the software in the Comfort System Control Module (J393, diagnostic address 0046). This procedure supersedes the Pending Service Solution (PSS) TSB 2072587.

1. Preparation: Follow all instructions detailed in TSB 2011732: 00 Software Version Management (SVM) operating instructions.
2. Software Update: Update the J393 (0046) control unit using the SVM action code provided in the table below. During the update, the vehicle key must be placed on the emergency reader coil.
3. Post-Update: After the software update, perform a bus sleep cycle. This involves turning the key off and allowing the vehicle to sit for a few minutes to ensure the module resets correctly.

Required Tools or Parts

The software update requires specific software versions and an SVM action code:

Model(s)	Diagnostic Address	Old Software Part Number	Old Software Version	New Software Part Number (or higher)	New Software Version (or higher)	SVM Code Input
A4, A5, Q7, and Q8	0046	8W1.907.064.*	0627, 0628	8W1.907.064.EA	0630	46A034
e-tron GT	0046	992.907.064.*	0627, 0628	992.907.064.EA	0630	46A034

Owner Action

If your 2023-2025 Audi is displaying the "SAFE CP" warning or you suspect issues related to DTC U110100, C115E54, or U111800, it is recommended to contact an authorized Audi dealership. They can perform the necessary diagnosis and apply the software update to the Comfort System Control Module (J393). Please note that if your vehicle is outside of its warranty period, this Technical Service Bulletin serves as informational guidance only, and repair costs may apply.

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Source: NHTSA ID 11007237