Q7 4M ABS Module Coding

Hi Everyone,

I have been in the process of retrofitting the Direct TPMS System with the 433Mhz Tyre valves (PR Code 7K3) to my 2016 Audi Q7 4M. Unfortunately its not an option in the UK, we just have the standard TPMS

The actual module itself is installed (shows up as Module 65 in AutoScan), plumbed into Extended CAN and registered in Can Gateway, however the 2 TPMS systems (the factory one I have by default and the Direct TPMS system) seem to be fighting against each other as the MMI screen flashes between both systems forever and Virtual Cockpit beeps constantly

We have worked out the differences in coding need to be changed in the 03 ABS Module by looking at multiple Q7 4M's that have Direct TPMS from factory against Q7 4M's that don't and we have 2 bits we want to change, but unfortunately getting past the security of this ABS module is causing us a road block.

Here is a Q7 4M ABS Module that does not have the Direct TPMS module from factory:


And here is a Q7 4M ABS Module that does have Direct TPMS module from factory:


Our issue is when we try to change these bits to see if is what is causing the 2 TPMS systems to fight with each other, we get denied errors in VCDS. We have been working with Ross-Tech on this (thanks Dana!) but come to a dead end so figured I'd reach out to the wider Ross-Tech Forum group for any thoughts/assistance.

We have a large number of Security Codes we have gathered over the last 12/24 months but none appear to allow us to change the ABS module long coding. We have also tried to change the bits separately, as well as changing both bits at the same time - both end with the same failure end result when trying to "Do It"

This is the error we get:

"Coding Rejected
Error 13: Incorrect message length or invalid format"



I should point that if we open long coding of the ABS Module (Module 03) and just copy and paste the long coding without changing it and without entering any security codes, it accepts it and says "Coding Accepted".

This is all being tested with the latest version of VCDS and the HEX-NET interface running the latest firmware.

Any thoughts, opinions, comments would be appreciated.

Cheers

Andy

andyhud said:

We have a large number of Security Codes we have gathered over the last 12/24 months but none appear to allow us to change the ABS module long coding.

Click to expand...

Is it safe to assume that you have checked:
IDE00323 -- Security Access: Number of invalid keys
and it has been 0 each time?

-Uwe-

Copy this label file to: C:\Ross-Tech\VCDS-Beta\Labels\User
Has to be used with Beta 18.7.0

If not already, First write numbers for wsc, importer, device no. described here
[Save]
[Close VCDS]
Start VCDS

Use Secure Access and test this coding:

@Uwe - Yes, we have checked these are 0 and in addition we have tried by leaving car overnight, long drives etc to ensure that Channel is 0 before "testing again"

@NEtech - Thankyou. We have the custom label file already thanks to Dana and the Secure Access code but it didnt work with that, I should have clarified.

That being said, we have not validated the WSC Importer details etc first so will check this, thankyou

Finally your coding string below is a lot less in size than the standard one, is that right?

Yours: Ours:
Thanks again for your support

Andy

andyhud said:

We have the custom label file already thanks to Dana and the Secure Access code but it didnt work with that, I should have clarified.

Click to expand...

It is tested and works.
Use the label file.
Use the WSC etc.
Charger
Ign. OFF > Ign. ON
Go

andyhud said:

Finally your coding string below is a lot less in size than the standard one, is that right?
Yours:

Code:

2430300AD6581852AAE6A6DA240C0C506B1A184A5567655B

Ours:

Code:

249830B230A30A9DD6A5589A187E52AAE6A6D2240C0C506B1A184A5567654B

Click to expand...

Yes that is correct, also see what you wrote above:

andyhud said:

"Coding Rejected
Error 13: Incorrect message length or invalid format"

Click to expand...

Understood NETech, I'm just a little confused because a factory Q7 with Direct TPMS has the same length coding as the non-Direct TPMS Q7.

What am I not understanding?

Thanks

Andy

It get the same original length after coding with the shorter.
It is without VIN coding.

Friend, this question is too simple. If you need help, please contact me.

peng shun jiang said:

Friend, this question is too simple. If you need help, please contact me.

Click to expand...

Thankyou!

I have PM'd you

Andy

andyhud, if you wanna try:

Address 17 - Byte 04 - Bit 0=0
Address 17 - Byte 03 - Bit 7=1
Address 03 - Byte 14 - Bit 6=0
Address 03 - Byte 26 - Bit 1=0.

The last two codings needs to be performed with other diagnosis (V*P) in a one shot way: copy the 03 original coding from fast-editing field, modify by hand the single bits, and paste the modified coding in the fast-editing field... together with original info as WSC, Imp. and Tester. Then start coding..... For me this procedure has worked....

A4Allroad said:

andyhud, if you wanna try:

Address 17 - Byte 04 - Bit 0=0
Address 17 - Byte 03 - Bit 7=1
Address 03 - Byte 14 - Bit 6=0
Address 03 - Byte 26 - Bit 1=0.

The last two codings needs to be performed with other diagnosis (V*P) in a one shot way: copy the 03 original coding from fast-editing field, modify by hand the single bits, and paste the modified coding in the fast-editing field... together with original info as WSC, Imp. and Tester. Then start coding..... For me this procedure has worked....

Click to expand...

Thankyou A4Allroad for your input, I've PM'd you.

Andy