2023 Audi e-tron 'SAFE CP' Warning with DTC U110100

Symptoms

Owners of 2023 Audi e-tron vehicles may observe the message "SAFE CP" displayed in the instrument cluster, often alongside other various warning messages. This indicates an active component protection system.

Fault Codes / DTCs

When the "SAFE CP" message appears, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in various control units:

• U110100: "Component protection active"
  • This DTC can be stored in the 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), and/or Control Unit for Night Vision System (-J853-, diagnostic address 0084).
• C115E54: "Inertial sensors no basic setting"
  • This DTC may be stored in the Airbag Control Unit (-J234-, diagnostic address 0015) subsequent to the primary issue.
• U111800: "Data set missing"
  • This DTC may be stored in the Chassis Control with Air Suspension (-J775-, diagnostic address 0074) subsequent to the primary issue.

Diagnosis and Trigger Conditions

The root cause of the "SAFE CP" warning and associated DTCs in the 2023 Audi e-tron is identified as a software issue within the Comfort System Control Module (-J393-, diagnostic address 0046). This technical service bulletin, 2074439/1, specifically addresses situations where DTC U110100 is found in the control units listed above (J104, J519, J234, J285, J853).

Important Note: This TSB does not apply if the DTC U110100 is logged in the Gateway (diagnostic address 0019) and/or directly in the Comfort System Control Module (-J393-, diagnostic address 0046). In such cases, further diagnosis outside the scope of this bulletin may be required.

Repair Procedure Summary

The recommended repair for the Audi e-tron SAFE CP warning involves updating the software of the Comfort System Control Module (-J393-). The procedure is as follows:

1. Software Version Management (SVM) Update: Follow the instructions provided in TSB 2011732, which outlines the operating procedures for SVM.
2. Module Update: Update the J393 (diagnostic address 0046) using the specific SVM action code 46A034. The new software version will be 0630, replacing older versions like 0627 or 0628.
3. Bus Sleep Cycle: After the software update is complete, 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.

Important Warnings and Post-Repair Steps

• Key Position During Update: During the software update process, the vehicle's key must remain on the emergency reader coil.
• Post-Update DTCs: In some cases, after the update, DTC C115E54 ("Inertial sensors no basic setting") may still be stored statically in the Airbag Control Unit (-J234-). If this occurs, technicians must perform the basic settings for the inertial sensors to clear the fault. It is not necessary to perform test plans for faults in the Chassis Control with Air Suspension (-J774-) related to DTC U111800. Once these steps are completed, all faults can be deleted.

Warranty Information

This repair is generally covered under Audi's new vehicle limited warranty for up to 48 months or 50,000 miles. For Audi Certified Pre-Owned (CPO) vehicles, coverage is 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.

• Service Number: 5789
• Damage Code: 0039
• Labor Operations:
  • Software update (includes checking for DTCs): 0151 0060
  • Software update: 0151 0010
  • Vehicle Check (Data bus sleep mode): 0689 0199 (10 Time Units)
• Claim Comment: As per TSB 2074439/1

All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

NHTSA ID: 11005902