Simos18.1 MPI Enable - 259D Box Code

Hey guys,

Recently picked up a 2015 A3 2.0T as a small project, it came with an MPI kit (CTS) already installed. Looking into getting it activated on now.

I found a thread on here where someone enabled MPI on another Simos18 ECU, compared out their changes and had a few questions if anyone could help that'd be awesome.


The following maps are not present on the 259D ECU definition:

Fuel - General - MPI - "Inhibit Table 0" set (Not present on 259D file)
Inhibit 11 & 12 to 0

Fuel - General - MPI - Valve Diagnostic - "Manual Inhibition" set to (Not present on 259D file)
0

Fuel - General - MPI - Valve Diagnostic - "Diag Init" set to (Not present on 259D file)
Whole table to 16


Any hints you may have are much appreciated! Attached is the OEM virtual read of the ECU.

Hey guys, put together an XDF for anyone on this same box code and has user defined parameters.

Has pretty much all of the comb mode/inhibits that we should need to properly enable MPI at WOT.


Attachment 144067

So update, MPI is working it definitely triggers at WOT now. But getting a throttle closure and full limp mode (until key cycle) right around 5500k RPM.

Also throws a strange code: P1388 code at that time too. I probably messed up something with the inhibits or combustion modes.

I found a thread on another forum with a 259L GTI file that had the MPI patched to work and compared that to an OEM 259L file in tunerpro. Made the same changes in my 259D file, but some maps are not present in 259D (at least as far as I could tell). This includes the second string of "Diagnostic initialization type" bits, also a few of the inhibit assignments in table 2 were different OEM to OEM, table 1 is a dead match with the 259L OEM though.

An OEM 259D file is attached, with all the MPI changes I made, if anyone has any thoughts please let me know!

Thanks!

Attachment 144091

I've seen this code before on other box codes and this fixed it. Basically just maxing a couple mass fuel flow monitor tables and torque monitor table. Give this one a go if you want.

Appreciate you! I'll give it a shot tomorrow!

The only change HPT picks up is the ECM 13635 "Max Fuel Flow Deviation", could you possibly share your XDF or the map FR map ID's of any others you changed?

Thanks!

Here you go, just these 2 additional tables. I was lazy and didnt bother defining the axis values since I was just going to max out the tables anyways.

Thank you! Did a quick test run with just 13635 mooned and no more limp mode!

For anyone else on 259D box code, here is the final XDF I used to get MPI working. With those two tables added as well.

Attachment 144130

Continuing this thread since it is sort of related.... Finally got around to adding the flex fuel sensor to this 259D box code, using user defined parameters I have the sensor enabled, and the PID enabled.

I can go into the manual PID part of VCDS and see the %, but no matter how many times I re-connect to the car with VCM Scanner it never populates the option for Ethanol Content.

Is there something specific we have to do to get it to request the PID?

Add manually?

DodgeBoy.
YouTube: https://www.youtube.com/@dodgeboy2785

How does one manually add a PID to monitor? I have the 0x22 HEX address to monitor.

Depending on if it's using the mode 22 or 01 PID for it, you may need to do the repoll for supported parameters option.

If it's not there at all then I guess make a ticket and hope they add it, but I'm pretty sure it's in there... I remember using it years ago.

Or better yet, use Simos Tools for logging

Quote:

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Originally Posted by aaronc7

Depending on if it's using the mode 22 or 01 PID for it, you may need to do the repoll for supported parameters option.

If it's not there at all then I guess make a ticket and hope they add it, but I'm pretty sure it's in there... I remember using it years ago.

Or better yet, use Simos Tools for logging

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Re-Poll did it, thanks!

Great, they must use the Mode 01 PID. The ECU advertises which ones it supports, but you have to tell it to send that request again (which is what the repoll function does).

Just got a response from support and they have added the 0x22 PID (F452) to the latest version of VCMScanner beta - after install and a re-poll you can find it listed as "flex fuel"