T5 4motion Difflock retrofit program scans required

[MAD]

Hey Guys,

I have retrofit the mechanical rear Difflock (to PR-1Y4 with Difflock from PR-1Y0 without Difflock) on my T5 2012 MY13 Transporter TDI400 LWB 4MOTION DSG to factory spec and need some help from the Programming and T5 4motion community so I can tell the vehicle what it needs to function to finalise the install (T5 Warranty is now finished so I can program it) I will be taking this on in the next month or so and trying to get info to study in advance,

The difflock control module is independent of the BCM (factory spec) and talks to the vehicle with signals thru the haldex then Canbus to the main cpu’s and ABS unit , the difflock actuator sensor unit is recognised as the difflock light is flashing on the dash board (Yes it recognises the feedback signals thru the haldex but just doesn’t know how to translate or function)

I can’t turn it on yet due to there not being any programming to tell it how to function,

What I need to get this working:

-Scans of same vehicle type if possible, (T5 2012 MY13 Transporter TDI400 LWB 4MOTION DSG, with ESP (PR-1AK), ABS , TCS and must have “PR-1Y4” with Difflock)

- A scan of the haldex unit with difflock off (no light on dash)

- A scan of the haldex unit with difflock on but not yet engaged (yellow difflock light should be flashing on dash)

- A scan of the haldex unit with difflock on fully engaged (yellow difflock light should be on solid on dash)

- A scan of the ABS module in all of the above scenarios also

- A photo or description of any the Lights/comments on the dash board or MFD when the Diffllock is engaged or being engaged (Including other systems)

- A general scan of the vehicle may also help (not sure if there are any other differences or modules that need programming in relation to the mechanical Difflock)


The scan of the ABS is due an inhibitor output from the ABS to the difflock control module, This is to stop it turning on in certain circumstances (IE: at too high a wheel rotational difference or speed), I also believe it disables ABS, TCS, and ESC systems when the mechanical difflock is engaged so it doesn’t get confused with the locked rear axels and locked haldex clutches


I have not got any scans yet as I don’t have a Ross Tech cable yet (not really happy with the newer pricing and shipping is ridiculous anyone know where to get at reasonable price?) , will post my scans as soon as I have an adaptor/cable

All programming outcomes will be posted when working for anyone else wanting to do this retrofit

Any help or advice would be Most Greatly Appreciated

Thanks In Advance

Best Regards

MAD

PS: Moderators, I have posted this elsewhere but got minimal response so doubling it up here, if not allowed please let me know and I'll delete 1 of them

[Syncrotek]

Hi MAD,

I can't help with any of that except that I've seen this in the past, just in case you haven't -

autofaultfinder
Haldex Repair Specialist and sale of Haldex related parts. 01270 440151 We are the Haldex controller repair specialist. Auto Fault Finder, The Railway Exchange, Weston Road, Crewe, CW1 6AA

seeing you are a long way from them they might give you some help, I've also noticed a few 4Motion rear diffs with
difflocks on German eBay lately, 1 example -

Google Translate Use Google Translate if it doesn't translate
automatically

VW t5 GP Wheel-Axle-NHX rear final-drive differential Diff-with-lock-44861 EUR 895.00 Buy It Now
with Diff Lock - without control unit for all-wheel drive
Good condition, with signs of wear. 223,633 km
There is still the end of the cardan shaft in the differential (solid rusted)
Shipping to: Europe, Asia, Australia eBay seller: kfz-teile-koellnick

some come with, some without control unit.

Anyway good luck, you are tenacious.

[Murphenzo]

I can't help, but I'm following with interest.

[Sunny43.5]

Quote " the difflock actuator sensor unit is recognised as the difflock light is flashing on the dash board (Yes it recognises the feedback signals thru the haldex but just doesn’t know how to translate or function) Maybe its in German . Groan .