Fault Code U0302 Software Incompatibility With TCM (TT 24-07-23)

WARNING: This page is about the Jetta 2.0T, Automatic DCT, which is a different variant/trim than selected.

Publication date: 2007-08-03
Reference number: TT 24-07-23

FAULT CODE U0302 SOFTWARE INCOMPATIBILITY WITH TCM

TECH TIPS

Reference Number(s): TT 24-07-23, Date of Issue: August 3, 2007 - UPDATE

VOLKSWAGEN:	2006-2007 Jetta / GTI / EOS with 2.0L TFSI Engine and DSG Transmission
GROUP:	24 - Multiport Fuel Injection

SERVICE INFORMATION

2006-2007 Jetta / GTI / EOS with 2.0L TFSI Engine and DSG Transmission - Fault Code U0302 Software Incompatibility with TCM

If, after replacing the Electronic Control Module (ECM), a shifting concern develops, check the ECM's long coding before diagnosing the wiring or replacing parts. If Byte 04 reads "18", the ECM is coded for a manual transmission and is not reading the Transmission Control Module (TCM) information.

Perform the following:

Enter Vehicle Self Diagnosis / On Board Diagnosis
Select AW 01 Engine
Select coding (Service 1A)
Check the Hexadecimal value in Byte 04. It should read "1C".

If the value is anything other than 1C, use the following steps to change Byte 04:

Highlight Byte 04
Hit the Hex button on the right side of the screen
Use the keypad and input "1C" and select Q
Hit the right arrow key to perform coding, a message will pop up "definitely perform coding?"
Hit the right arrow key again to accept the new long coding
Confirm Byte 04 now reads "1C"
Recheck communication and clear out fault codes

NOTE: This procedure can be used for other models. For GTI, Jetta, and Passat with manual transmission use Hex Byte "18". For Passat 2.0 TSFI with 09G transmission use Byte "19".