2023 Audi e-tron 'SAFE CP' Message TSB

Symptoms

Owners of the 2023 Audi e-tron may notice the message "SAFE CP" appearing in the instrument cluster. This warning can be accompanied by other various messages, indicating a potential issue with component protection.

Fault Codes / DTCs

When the "SAFE CP" message appears, specific Diagnostic Trouble Codes (DTCs) may be stored in various control units. These include:

Important Warnings

Audi has issued specific guidance regarding this Technical Service Bulletin 2074439/2:

• "This TSB 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)."
• "The Key must be on the emergency reader coil during the update."

Diagnosis and Trigger Conditions

The underlying cause for the "SAFE CP" message 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).

Repair Procedure Summary

This TSB 2074439/2 provides a solution for the 2023 Audi e-tron SAFE CP issue through a software update. The repair process involves several key steps:

1. Software Version Management (SVM) Instructions: Technicians must first follow the instructions outlined in TSB 2011732, which details the general operating procedures for SVM.
2. Module Software Update: The Comfort System Control Module (-J393-, diagnostic address 0046) requires a software update. This is performed using the SVM action code 46A034.
3. Bus Sleep Cycle: After the software update is completed, the vehicle must undergo a bus sleep cycle. This is achieved by turning the ignition key off and allowing the vehicle to sit for several minutes to ensure the module resets correctly.
4. Post-Update Fault Management: In some instances, the DTC C115E54 ("Inertial sensors no basic setting") might still be stored in the Airbag Control Unit (-J234-, diagnostic address 0015) after the update. If this occurs, technicians are instructed to perform 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-, diagnostic address 0074). Once these steps are completed, any remaining faults can be deleted.

Required Software and SVM Codes

The software update targets the Comfort System Control Module (diagnostic address 0046). The relevant software and SVM codes are:

• Old Software Part Number: 8W1.907.064.*
• Old Software Version: 0627, 0628
• New Software Part Number: 8W1.907.064.*
• New Software Version: 0630 (or higher)
• SVM Code Input: 46A034

Warranty Information

For vehicles still under warranty, this repair is typically covered. If the vehicle is outside of its warranty period, this Technical Service Bulletin is considered informational only. Standard labor operations for this procedure include software updates (01510060, 01510010) and a vehicle check with data bus sleep mode (06890199).

Source: NHTSA Manufacturer Communication 11011260.