TPMS

From Roccopedia
Jump to: navigation, search

Wireless Version

If you have VCDS, it is possible to have a switch-less Tyre Pressure Monitoring System symbol in the speedo dial. It will monitor exactly the same when it comes to a deflated tyre indication and logging faults in the diagnostics. The only thing missing is the wiring and the centre console 'reset'/'set' switch.

Instead of the switch, you use VCDS to reset the symbol indication if a deflation has occurred or change in tyre pressure while checking.


So how????......

It's a 5 minute job with VCDS. (This applies to the MK60EC1 ABS controller)

So here goes........


Stage 1: Tyre Checks - Correct Inflation Pressures

Check all tyres are correctly inflated to the required pressure.

Turn the ignition ON, engine not started. Connect up VCDS.


Stage 2: TPMS Coding

Select: 03 - ABS Brakes (Chime sound and ABS, ESP & Brake Fault symbols flash) Select: Coding - 07 Select: Long Coding Helper Select: Byte 16 and tick "bit 2 - Tire Pressure Monitoring TPMS / PR-7K6 ". ie set the bit 'ON' (ie. setting its value = 1) (If you don't have VCDS v10.6.0. or v10.6.1. then see the bottom of the page on how to set undocumented bits) Close the Byte window on the screen by selecting 'Exit' on the top left corner. Select: Do It! (No TPMS symbol in the speedo dial .)

TPMS1.jpg

To confirm all is well: Exit VCDS temporarily. Turn the ignition OFF. Wait 1 second. Turn the ignition ON. The TPMS tyre warning symbol should illuminate for about 1 second and extinguish like the factory fitted system along with the ABS & ESP warning symbols.

TPMS2.jpg

Now, the system needs resetting the same as the "reset" button is used in the factory option, so .......

Stage 3: TPMS Reset and Learn With the ignition ON, engine not started. Connect VCDS.

Select: 03 – ABS Brakes (Chime sound and ABS, ESP & Brake Fault symbols flash) Select: Basic Setting – 04

TPMS3.jpg

Key in:"042" in the Group field (ie. circled in red in photo below.) Select: Go! (ie. circled in blue in photo below.)

TPMS4.jpg

The TPMS symbol will illuminate and the yellow ABS and ESP symbols will flash rapidly, alternatively. Select: Done, Go back The TPMS symbol extinguishes and the yellow ABS and ESP symbols will flash together at a half second rate while the ignition is switched ON.

To confirm all is well: Exit VCDS. Turn the ignition OFF. Wait 1 second. Turn the ignition ON. The TPMS symbol will illuminate and extinguish after 1 second.

Disconnect VCDS Switch off the ignition.


Stage 4: Educate TPMS for learned values

Just drive the Scirocco. It takes about 60 miles at various speeds upto 70 mph driving for the system to fully "learn" as it does with the TPMS button factory option. If you only do urban driving it will take a lot longer, about 550 - 600 miles. It needs at some point to see a higher rotational speed for a while to complete.

The important field is 231,4 with its value of "2". The confirmation that it has completed the learning process is Measuring Block 231,4 changes to a "2".

Measuring Blocks 230,3 & 230,4 have values 6666 & 6662 or near similar; 231,3 has 8870 or near similar value at the learning maturity point as M.B. 231,4 switches to value "2". Measuring Block 230,4 is measuring the four wheel vibrations.

Field 232,3 has the error count as a tyre deflates.

If a Basic Settings is performed on Grp 042, then these 5 fields are returned to zero and the learning process begins.

This is the same action the factory switch does when pressed to re-calibrate.

During learning the system can only detect changes in tyre pressure of about 10psi. On maturity of the learning process this improves to detecting about 4 - 5 psi drop before the speedo dial tyre warning symbol comes on.

Hey-presto..... TPMS operational and same functionality with the reset button replaced by VCDS. No induced fault codes from the coding. No wiring!


Finally completed the VCDS label file for the ABS Mk60 this weekend. So, if this label file is loaded in the sub-label folder named "user", in the VCDS Ross-Tech folder, ie. C:\Ross-Tech\VCDS\Labels\User, it should load and give all the correct labelling for the 03 - ABS Brakes Measuring Block groups

http://www.sciroccocentral.co.uk/1K0-907-379-60EC1F.zip

Download and save as the file name shown above. Then extract the label file


1) If you check your tyres and change the inflation pressure, you will need to "reset" the TPMS and let it do the 60 mile relearning as with the factory option. To do this, perform "Stage 3" instructions above with Basic Settings on Group 042 followed by "Stage 4".

2) If you experience a deflated tyre and the TPMS sysmbol comes on, then as with the factory option, check the tyres visually and with tyre pressure gauge. Once adjusted or repaired, connect your PC & VCDS and follow "Stage 3" above to reset (extinguish) the indication and 1 hour re-learn ie. followed by "Stage 4". The only difference is measuring block 042, field 2 will change to " EEPROM Reset "

3) If a tyre or tyres deflate, the TPMS will also report a diagnostic fault code(s) in the ABS controller. Just clear the fault once examined and understood. Reset the TPML using the "Stage 3" followed by "Stage 4" instructions above. The controller will store multiple fault codes if there is more than one occurrence.

4) To deactivate the system, just select 03-ABS Brakes, Coding – 07, Byte 16, Bit 2 back to "0". Clear any fault codes and that's it removed from the system (such as if you are selling your Scirocco as the buyer may not have access to VCDS).

Again, big thanks to logger out in Australia for this and his time and effort into the back ground research and induced deflation tests that has proved it works identically to the factory switch option.


Retrofitting TPMS switch See How to Retrofit Tyre Pressure Measuring System (with button) & Retrofitting Tyre Pressure Monitor


Setting Undocumented Bits OLD: Long Code: 743B60F5092200002E0D06ED901C00403000 Byte 16: Binary: 00110000 ie “30” in the long code

NEW: Long Code: 743B60F5092200002E0D06ED901C00403400 Byte 16: Binary: 00110100 ie “34” in the long code

To change a bit without the Bit tick box being present, you change the relevant binary bit from 0 to 1 by overwriting the 0 to a 1 in the Binary Field to get the revised binary pattern, follow the instructions here

NB. Wise not to change other undocumented bits in the controller units as some do not revert. Red face at the dealers to ask for a controller re-programming!!)