DTCs after DPF/AGR removal

[aldriana]

Hi All,

I've got a question onto a VW Touran 1.9TDI BLS (2006) with 03G906021P as I dont have the experience yet.

I've emptied :) the DPF/FAP and blocked the EGR pipe with a blank cover.

In case I flash now a new binary into the ECU, will DTCs continue to appear or go away after deleting the error memory with VCDS?

The only changes I'd like to make is hysteresis 2 and 5 as well as DPF/OFF with just one bit fro 1 to 0.

Thanks in advance!

b.r.
Andreas

[chli1976]

Post VCDS scan

[Diagnosticated]

If you use hysteresis maps for egr off you cannot block egr pipe. If you do, you get errors.
If dpf empty, you must reset dpf to new status before replace ecu file with dpf off file.

[smirnoff_rules]

will DTCs continue

Dont think his done it yet

[aldriana]

Here is the VCDS scan.

Address 01: Engine Labels: 03G-906-021-BLS.clb
Part No SW: 03G 906 021 P HW: 03G 906 021 P
Component: R4 1,9L EDC G000AG 9021
Revision: --H02---
Coding: 0000078

[aldriana]

If you use hysteresis maps for egr off you cannot block egr pipe. If you do, you get errors.
If dpf empty, you must reset dpf to new status before replace ecu file with dpf off file.

What modification would then be suitable?

Thanks!

[aldriana]

Dont think his done it yet

You are right, I haven't touched the ECU yet. I only did the mechanical work (blocked EGR with metal covers) and removed the ceramics of the DPF.
The car tells me know some issues with EGR flow rate and DPF efficiency, which of course is what I expected.

How can I set the DPF to new? VCDS requires a passcode for mods to the ECU.

[chli1976]

If dpf empty, you must reset dpf to new status before replace ecu file with dpf off file.

Have removed DPF on BLS, disable the DPF in soft and no reset to new status und it works like a charm

[Diagnosticated]

Have removed DPF on BLS, disable the DPF in soft and no reset to new status und it works like a charm
sometimes regen request is in memory from ori file. when you replace with dpf off file you get regen request later even though dpf is off. Safer to reset dpf to new or after new regen to avoid this.

[Diagnosticated]

What modification would then be suitable?

Thanks!
If egr is blanked you need to change egr maps, not hysteresis maps. You must change egr request maps and max/min values.
If you cannot reset dpf status you must wait to see if regen request is in memory or not.

[aldriana]

If egr is blanked you need to change egr maps, not hysteresis maps. You must change egr request maps and max/min values.
If you cannot reset dpf status you must wait to see if regen request is in memory or not.

Do you have details on how to do that?

[chli1976]

sometimes regen request is in memory from ori file. when you replace with dpf off file you get regen request later even though dpf is off. Safer to reset dpf to new or after new regen to avoid this.

You mean remove DPF physical and then make a regeneration or only set ash to 0

[aldriana]

Well, I could reset the DPF via VCDS by setting the ash value to 0. I cleared all DTCs of the ECU and pulled the flash. How can I now change the EGR map, so the DTC of it won't appear. As said, EGR was blanked.

[aldriana]

No one who can tell?

[Diagnosticated]

If you use blank plate you must set egr maps to max and change max/ min maps.
why not change hysteresis maps and take blanking plate off.

[Diagnosticated]

You mean remove DPF physical and then make a regeneration or only set ash to 0
Either set ash to 0 or reset file for new dpf.
Sometimes dpf regen request is in memory. If you remove dpf pysically and flash dpf off file, you still get regen request or dpf errors. When this happens you have to flash ori file and reset soot levels or set file as new dpf. This is mainly a problem when someone has bad dpf with warnings. They remove it physically and flash dpf off file but don't bother to reset regen status first.

[aldriana]

If you use blank plate you must set egr maps to max and change max/ min maps.
why not change hysteresis maps and take blanking plate off.

Well, my EGR valve is damaged because the DPF cloaked up and the ECU did not tell ~~~~ about it. So I Go with blanking the crap.

Can you tell me what exactly max/min maps mean?

[Diagnosticated]

Well, my EGR valve is damaged because the DPF cloaked up and the ECU did not tell ~~~~ about it. So I Go with blanking the crap.

Can you tell me what exactly max/min maps mean?

Depending on the file type, you will have one or more egr maps. Set these to maximum all over. So if highest value is 1200, set map to 1200 all over. Near the egr maps there will usually be two values. Maximum and minimum. These can be hard to find in the file. The maximum value needs to be set same as egr map maximum. The minimum value needs to be set to zero. If you do not do this you may get errors and even limp mode with some ecu.

[chli1976]

Do you know this min max map named in Damos ?

[chli1976]

Have found it

AirCtl_mMaxDesVal_C
AirCtl_mMinDesVal_C

[aldriana]

Can you help me out with a Damos file for my ECU?

[aldriana]

Hi There, some feedback from my experience.
All works fine now. Here is what I did.

mechanically: DPF emptied, EGR blankened

VCDS:
- cleared DTCs / in ECU twice to disappear
- set DPF ash value to zero

ECU:
- read with MPPS

WinOLS:
- manually set hysteresis 2 and 5 of EGR to zero
- set DPF bit to 0

ECU:
- flashed with MPPS

One to say. Several manuals out there are incorrect or contain errors.
It is important to fully clear the two hysteresis. Some manuals forgot values at beginning / end of the curves.

No DTC appears, fuel cons is approx. 1l/100km less.