Engine Controls - MIL ON/DTC's P1847/P1624

01 MIL on - TCM and ABS speed sensor

01 08 36 2014740/2 December 22, 2008. Supersedes Technical Service Bulletin Group 01 number 07-10 dated April 5, 2007 for reasons listed below.

Model(s) A3
Year: 2006
VIN Range: 8P 6A 004903 - 8P 6A 062581
Vehicle-Specific Equipment: 2.0L TFSI R4 Engine DSG Transmission

Condition

REVISION HISTORY
Revision: 2
Date: -
Purpose: Revised Title to add Repair Group

MIL on - TCM and ABS speed sensor

MIL on; no DTC reported in generic scan tool (GST).

Readouts can only be obtained by an enhanced GST. An enhanced GST will report:

^ TCM: DTC P1847 (Please check DTC memory of Brake System ECU)

^ ECM: DTC P1624 (Requirement - fault lamp on active)

Technical Background

A software error causes the Mechatronics Unit to transmit a "MIL on" request to the ECM. The faults are evident when the vehicle is driven on a dynamometer or when there is an actual speed sensor failure. The wheel sensors should not illuminate the MIL.

Production Solution

Improved software.

Service

^ Do not replace the TCM or ECM unit if you are using a generic scan tool and there aren't any DTCs in the TCM or ECM for the MIL on and ABS warning light on condition.

^ Please check the DTC memory of the brake system ECU for speed sensor faults.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

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.