2022-2023 Audi A3, S3, RS 3 A/C Display Inoperative TSB

Owners of certain 2022-2023 Audi A3, S3, and RS 3 vehicles may experience an issue where the front A/C display control head (E87) becomes inoperative. This condition prevents any adjustments to the climate control system and is often accompanied by a specific diagnostic trouble code.

Symptoms

If your vehicle is affected, you will notice that the E87 front A/C display control head is completely blank, showing no readout. This means you will be unable to make any adjustments to the climate control system from the display head. This is the primary symptom indicating a potential issue with the 2022 Audi S3 A/C display inoperative condition.

Fault Codes / DTCs

When diagnosing this issue, technicians will typically find the following Diagnostic Trouble Code (DTC) stored in the J979 Heating and Air Conditioning Control Module (address word 0008):

• DTC B200046: Control module faulty, active/static

Diagnosis / Trigger Conditions

Audi's Technical Service Bulletin 2070582/1 indicates that the root cause of this symptom is usually an under voltage event. This could be due to an issue within the vehicle's high-voltage system or a general problem with the vehicle's voltage supply. Such an event can compromise the memory capability of the J979 Heating and Air Conditioning Control Module, leading to the storage of DTC B200046 and the resulting inoperative A/C display.

Repair Procedure Summary

The repair for the 2022 Audi S3 A/C display inoperative issue, as outlined in TSB 2070582/1, involves a simple power cycle of the affected control module. The procedure is as follows:

1. Switch off the ignition. Ensure the vehicle is completely powered down.
2. Locate and remove fuse SC43. This fuse supplies terminal 30 power to the J979 Heating and Air Conditioning Control Module. Refer to Figure 1 in the TSB for its location in fuse panel C –SC-.
3. Wait for at least 30 minutes. This duration ensures the control module fully discharges and resets.
4. Reinstall fuse SC43. Securely place the fuse back into its original position.
5. Turn the ignition on. Power up the vehicle.
6. Readdress the 0008 module. This step ensures proper communication is re-established with the J979 control module.
7. Clear the DTC. Use a diagnostic tool to clear the stored DTC B200046.

Following these steps, the E87 front A/C display control head should return to normal operation, restoring full HVAC control.

Important Warnings

If your vehicle is outside of any applicable warranty coverage, this Technical Service Bulletin is informational only. In such cases, any repairs performed based on this information would typically be at the owner's expense.

Owner Action

If you are experiencing a blank or inoperative A/C display in your 2022-2023 Audi A3, S3, or RS 3, and suspect a 2022 Audi S3 A/C display inoperative condition, it is recommended to visit an authorized Audi service facility. They can diagnose the issue by checking for DTC B200046 and perform the necessary fuse reset procedure. This repair is generally covered under warranty for up to 48 months or 50,000 miles, or for CPO (Certified Pre-Owned) vehicles under their respective warranty terms.

Source: NHTSA ID 10238180