Audi A4 Quattro Sedan # 451206 Date: 121205
ABS/TCS System - DTC 01044 Stored After Replacing ABS Unit
45 DTC stored after replacing ABS unit (DTC 01044)
661
45 12 06
2031989/1
December 5, 2012.
Affected Vehicles
Condition
After replacing the ABS control unit, the new control unit stores DTC 01044 (Control Unit Incorrectly Coded).
No warning light is on and the brake electronics work correctly.
Technical Background
Due to a supersession of parts, only ABS/ESP hydraulic control units prepared for vehicles equipped with the start-stop feature are supplied as
replacement parts.
Once installed, the new unit stores DTC 01044 (Control Unit Incorrectly Coded) because it does not receive a response on the data bus when
checking for the start-stop feature. The missing response results in the DTC entry.
Within the scenario described in the Condition section of this TSB, the missing start-stop response is the only reason for this DTC. In all other
respects the coding of the ABS/ESP control unit matches the vehicle data. The entry does not affect the function of the brake electronics and no
warning appears in the instrument cluster. There are no effects on performance or safety.
Production Solution
No change.
Service
^ If DTC 01044 (Control Unit Incorrectly Coded) occurs within the scenario described in the Condition section of this TSB, it can be ignored.
^ If DTC 01044 is stored along with a customer complaint or brake warning in the instrument cluster, proceed according to Guided Fault Finding.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
ABS/TCS System - DTC 01044 Stored After Replacing ABS Unit
45 DTC stored after replacing ABS unit (DTC 01044)
661
45 12 06
2031989/1
December 5, 2012.
Affected Vehicles
Condition
After replacing the ABS control unit, the new control unit stores DTC 01044 (Control Unit Incorrectly Coded).
No warning light is on and the brake electronics work correctly.
Technical Background
Due to a supersession of parts, only ABS/ESP hydraulic control units prepared for vehicles equipped with the start-stop feature are supplied as
replacement parts.
Once installed, the new unit stores DTC 01044 (Control Unit Incorrectly Coded) because it does not receive a response on the data bus when
checking for the start-stop feature. The missing response results in the DTC entry.
Within the scenario described in the Condition section of this TSB, the missing start-stop response is the only reason for this DTC. In all other
respects the coding of the ABS/ESP control unit matches the vehicle data. The entry does not affect the function of the brake electronics and no
warning appears in the instrument cluster. There are no effects on performance or safety.
Production Solution
No change.
Service
^ If DTC 01044 (Control Unit Incorrectly Coded) occurs within the scenario described in the Condition section of this TSB, it can be ignored.
^ If DTC 01044 is stored along with a customer complaint or brake warning in the instrument cluster, proceed according to Guided Fault Finding.
Warranty
This TSB is informational only and not applicable to any Audi warranty.
Additional Information
All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service
manuals for the latest information.
