2023-2024 Audi SAFE CP Cluster Warning TSB

Owners of various 2023-2024 Audi models, including the Audi e-tron, may encounter a warning message stating "SAFE CP" in their instrument cluster. This message often appears alongside other warnings and indicates an underlying issue with component protection or data integrity within the vehicle's electronic systems. Audi Technical Service Bulletin (TSB) 2073601/3 addresses this condition, providing a software-based solution.

Symptoms

The primary symptom owners will notice is the message "SAFE CP" displayed prominently in the instrument cluster. This warning may be accompanied by other various messages, indicating a potential malfunction in one or more control units.

Fault Codes / DTCs

When the "SAFE CP" message appears, technicians may find several Diagnostic Trouble Codes (DTCs) stored in various control units. The main DTC associated with component protection is U110100.

• U110100: Component protection active
  • This DTC can be stored in multiple control units, including:
    • 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)

Subsequent DTCs that may also be stored include:

• C115E54: Inertial sensors no basic setting (in Airbag Control Unit, -J234-, diagnostic address 0015)
• U111800: Data set missing (in Chassis Control with Air Suspension, -J775-, diagnostic address 0074)

Technical Background

The root cause of the "SAFE CP" message and associated DTCs, including the primary U110100, has been identified as a software issue within the Comfort System Control Module, designated as J393 (diagnostic address 0046). This software anomaly can trigger the component protection system or lead to data set errors.

Important Warnings

It is crucial for technicians and owners to note specific conditions related to this TSB:

• Exclusion: This TSB 2073601/3 does not apply if the DTC "U110100: component protection active" is logged in the Gateway (diagnostic address 0019) and/or in the Comfort System Control Module (diagnostic address 0046). This distinction is vital for proper diagnosis.
• Key Position During Update: During the software update procedure, the vehicle's key must be placed on the emergency reader coil to ensure a successful and uninterrupted update.
• Post-Update Procedure for C115E54: In some cases, after the software update, the DTC "C115E54: Inertial sensors no basic setting" may remain static in the Airbag Control Unit (-J234-). If this occurs, technicians must perform the basic settings for the inertial sensors to make the fault passive. It is not necessary to perform test plans for faults in the Chassis Control with Air Suspension (-J774-).

Repair Procedure Summary

The resolution for the "SAFE CP" message and related DTCs, such as U110100, involves updating the software of the Comfort System Control Module (J393, diagnostic address 0046). This procedure supersedes previous guidance, including Pending Service Solution (PSS) TSB 2072587.

1. Preparation: Follow all instructions detailed in TSB 2011732, which covers Software Version Management (SVM) operating instructions.
2. Software Update: Update the J393 control unit (diagnostic address 0046) using the SVM action code 46A034. This update will install new software version 0630, replacing older versions like 0627 or 0628.
3. Post-Update Checks: After the update, if DTC C115E54 is present in the Airbag Control Unit, perform basic settings for the inertial sensors. Faults in the Chassis Control with Air Suspension (J774) do not require test plans and can be deleted once the update is complete and basic settings are performed if necessary.

Required Parts or Software

The software update utilizes specific software part numbers and an SVM input code:

• Diagnostic Address: 0046 (Comfort System Control Module)
• Old Software Part Number: 8W1.907.064.EA
• Old Software Version: 0627, 0628
• New Software Part Number (or higher): 8W1.907.064.EA
• New Software Version (or higher): 0630
• SVM Input: 46A034

Warranty Information

This repair is covered under Audi's warranty program under Claim Type 110 for up to 48 months or 50,000 miles. For Certified Pre-Owned (CPO) vehicles, Claim Type G10 applies, requiring owner verification. If the vehicle falls outside of any applicable warranty, this Technical Service Bulletin serves as informational guidance only. The service number for this procedure is 5789.

Owner Action

If your 2023-2024 Audi e-tron or other affected model is displaying the "SAFE CP" message or related warnings, it is recommended to schedule an appointment with an authorized Audi dealership. They can diagnose the specific fault codes, confirm the applicability of TSB 2073601/3, and perform the necessary software update to resolve the issue.

Source: NHTSA ID 11002232