1.2 TDI CWFA - Fuel injection deviation

Hello forum,

The engine is making a noticeable knocking sound when accelerating (even when the engine is warm). The oil was changed to fresh oil to rule out diesel fuel contamination as a cause of the knocking sound.
The workshop replaced the injectors for cylinders 2 and 3.

Fuel injection deviation: Cylinder 1: 64 µs.
Fuel injection deviation: Cylinder 1: -44 µs.
Fuel injection deviation: Cylinder 1: -44 µs.

Is it only a matter of replacing the injector for cylinder 1? Or is there more trouble to be expected (I can't quite understand the -44µs... within what tolerances are the values specified in µs considered acceptable)?

Thank you.

Hi,
It would be great if you could introduce your vehicle here.
Type, mileage, auto-scan.
What was the problem, besides the hammering? Were the IMA correction values entered after the injectors were replaced?
"You probably mean the values for cylinders 1, 2, and 3 with your list," the crystal ball says.
You could get a better understanding if you could provide us with a graph of the extended measurement data, similar to the one attached (this is a 1.6L R4 engine).
hg
Herbert.

@Herbert

Thank you for the information!

Volkswagen Polo 6R, year of manufacture 2013.
3-cylinder. Diesel, 1199ccm, 75 horsepower.
CWFA CR-engine / DPF
Approximately 107,000 km.
Please provide the German text you would like me to translate into English.

I took possession of the vehicle with...
Nail and workshop bills via...
Replaced injectors in cylinders 2 and 3.

While checking the coding of injectors 2 and 3.
It was noted that no encoding was performed on one of them.
I had an issue, but I was able to fix it using the instructions here for the long encoding.

No further information is available regarding the specific work the workshop performed on these two injectors.


Please provide the German text you would like me to translate into English.
Autoscan
Please provide the German text you would like me to translate into English.
Vehicle type: 6R-VW25 (6N0)
Scan: 01 03 04 08 09 15 17 19 25 44 56

Vehicle Identification Number: WVWZZZ6Rxxxxxxxx Mileage: 106850 km

01-Motor electronics -- Status: OK 0000
03-Brake electronics -- Status: OK 0000
04-Steering angle sensor -- Status: OK 0000
08-Climate/Heating Unit -- Status: Error 0010.
09-Central Electrical System -- Status: Error 0010.
15-Airbag -- Status: OK 0000
17-Terminal block insert -- Status: OK 0000
19-Diagnostic interface -- Status: Error 0010.
Immobilizer -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
56-Radio -- Status: Error 1010.
"Der schnelle braune Fuchs springt über den faulen Hund."
Address 01: Engine Control Module (J000-CFWA) Label file: . DRV\03P-906-021-CFW.clb
Part number SW: 03P 906 021 AJ, HW: 03P 907 425 A.
Part: R3 1.2l TDI H09 9979
Revision: 11002001 Serial number:
Encoding: 00114010002400080000
Operating number: WSC 00788 648 00255
ASAM Dataset: EV_ECM12TDI03103P906021AJ 001010
ROD: EV_ECM12TDI03103P906021AJ.rod
VCID: 70B82A72AA26729BA22-8024

No error codes found.
Readiness: 0 0 0 0 1

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 03: Brake Electronics (J104) Label file: . DRV\6R0-907-37x-ESP90.clb
Part number SW: 6R0 907 379 AS, Part number HW: 6R0 907 379 AS.
Component: ESP9.0i front H01 0002
Serial number: --------------
Encoding: 21DD2485412700C88419246C825A00420904
Operating number: WSC 01383 785 00200
ASAM Dataset: EV_Brake1ESP90iBOSCH 003020
ROD: EV_Brake1ESP90iBOSCH_003_VW21.rod
VCID: 0F7A498ED7D80D63DB8-805A

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address: Steering angle sensor (G085)
Label file: * DRV\6R0-959-654.clb
Part number SW: 6R0 959 654 Part number HW: 6R0 959 654
Part: STEERING SENSOR H06 0060
Serial number: 14111204651772.
Encoding: 01
Operating Number: WSC 00000 000 00000
ASAM Dataset: EV_LWSKLOVW25X 005001
FILE: EV_LWSKLOVW25X.rod
VCID: 7EA4044AE07214EB20E-802A

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 08: Climate Control/Heater (J255)
Label file: 6R0-907-044.clb
Part number SW: 6R0 907 044 B, Part number HW: 6R0 907 044 B.
Component: Climatronic. Part number: H08 0305.
Revision: V0000000
VCID: 323CE07A642A008B946-8066

3 error codes found:
00229 - Refrigerant pressure.
002 - lower limit exceeded.
Environmental conditions:
Error status: 01100010
Error priority: 3.
Error frequency: 1
Lost Count: 160
Mileage: 106,682 km
Time: 0
Date: 2020.10.03
Time: 03:04:33

00706 - Relay for radiator fan, stage 2 (J513)
009 - Short circuit to ground.
Environmental conditions:
Error status: 01101001
Error priority: 3.
Error frequency: 1
Lost Count: 160
Mileage: 106,682 km
Time: 0
Date: 2020.10.03
Time: 03:04:34

01272 - Actuator motor for central locking (V70).
000 - - - Sporadic
Environmental conditions:
Error status: 00100000
Error priority: 3.
Error frequency: 1
Lost Count: 200
Mileage: 106,682 km
Time: 0
Date: 2020.10.03
Time: 03:06:40


"Der schnelle braune Fuchs springt über den faulen Hund."
Address 09: Central Electronics (J519)
Label file: . DRV\6R0-937-08x-09.clb
Part number SW: 6R0 937 087 M, HW: 6R0 937 087.
Part: BCM PQ25 H+4 H32 0407
Revision: BF032001 Serial Number: 0540 323120515
Encoding: 7CB0293F08A10000002008002D2B0CD00080410F60060000200000000000
Operating number: WSC 124697 483 00190
VCID: 47CAA1AEFFA89523D38-8012

Subsystem 1 - Part number SW: 6R0 959 801 AB, HW: 6R0 959 801 AB, Label file: 6R0-959-801.CLB.
Part: J386__TSG_FT 008 1621
Serial number: KU0KU024101200010423
Encoding: 18BC30

Subsystem 2 - Part number SW: 6R0 959 802 AD HW: 6R0 959 802 AD Label file: 6R0-959-802.CLB
Part: J387__TSG_BT 008 1621
Serial number: KU0KU028101200010179
Encoding: 18BC30

Sure, here is the translation of the text from German to English:

"1 error found:"
00157 - Terminal X
008 - Implausible signal - Sporadic.
Environmental conditions:
Error status: 00101000
Error priority: 3.
Error frequency: 1
Lost Count: 200
Mileage: 106,683 km
Time: 0
Date: 2020.10.03
Time: 18:44:21


"Der schnelle braune Fuchs springt über den faulen Hund."
Address 15: Airbag (J234) Label file:| DRV\5K0-959-655.clb
Part number SW: 6R0 959 655 K, Part number HW: 6R0 959 655 K.
Part number: VW10Airbag01K H10 0020
Revision: -------- Serial Number: 003GX01GSD8W
Encoding: 00314B
Operating number: WSC 01383 785 00200
ASAM Dataset: EV_AirbaVW10BPAVW250 A01001
ROD: EV_AirbaVW10BPAVW250.rod
VCID: 4ACC989AEC3A684BCC6-801E

Crash sensor for driver-side side airbag:
Serial number: 3575HRB400G4UOJABP36

Crash sensor for side airbag, passenger side:
Serial number: 3585HRB400K4UNTAAQ3K

Rear side airbag crash sensor (driver's side):
Serial number: 3515RRB400O4UO86E1E-

Crash sensor for rear side airbag, passenger side:
Serial number: 3525RRB40551NOT659AT

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 17: Terminal block insert (J285) Label file: DRV\5K0-920-xxx-17.clb-SRI1
Part number SW: 6R0 920 861 J, Part number HW: 6R0 920 861 J.
Component: COMBINATION UNIT H05 0605
Serial number: 00000000000000
Encoding: 140000
Operating number: WSC 00788 648 00255
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04716
ROD: EV_Kombi_UDS_VDD_RM09_004_VW25.rod
VCID: 3C20CE42B6EEC6FB4EA-8068

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 19: Diagnostic interface (J533)
Label file: . DRV\6N0-909-901-6R.clb
Part number SW: 6N0 909 901 Part number HW: 6R0 937 087
Component: GW-K-CAN TP20 H32 0407
Revision: BF032001
Encoding: 002000
Operating number: WSC 124697 483 00190
VCID: 70B82A72AAA6729BA22-8024

Sure, here is the translation of the text from German to English:

"1 error found:"
01304 - Radio
004 - No signal/communication - Sporadically.
Environmental conditions:
Error status: 00100100
Error priority: 2
Error frequency: 7
Lost Count: 201
Mileage: 106,683 km
Time: 0
Date: 2020.10.03
Time: 03:11:55


"Der schnelle braune Fuchs springt über den faulen Hund."
Address 25: Immobilizer (J334) Label file:| DRV\5K0-920-xxx-25.clb
Part number SW: 5K0 953 234 HW: 5K0 953 234
Component: IMMO H05 0605
Serial number:
Encoding: 000000
Operating Number: WSC 00000 000 00000
ASAM Dataset: EV_Immo_UDS_VDD_RM09 A03709
ROD: EV_Immo_UDS_VDD_RM09_VW21.rod
VCID: 6A8C381A8CFA884BEC6-803E

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 44: Steering Assist
Label file: DRV\6Q0-423-156.clb
Part number: 6R0 423 156 C.
Part: Power Steering Unit - TRW - V278
Encoding: 11230
Operating number: WSC 00788
VCID: 3038EA726366329BE22-8064

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 56: Radio.
unavailable

End -------- (Duration: 01:00, Battery voltage start/end: 14.0V/13.9V) --------
Please provide the German text you would like me to translate into English.

Quote:

While checking the coding of injectors 2 and 3. It was noted that no encoding was performed on one of them. was happened, and I was able to fix it correctly using the instructions here for long encoding

.
I don't understand. I only know how to enter and check correction values using the adjustment channels, but not through the encoding process. To my knowledge, the selection process only involves checking boxes and using list values.
hg
Herbert.

Herbert wrote:

Quote: While checking the coding of injectors 2 and 3. It was noted that no encoding was performed on one of them. was happened, and I was able to fix it correctly using the instructions here for long encoding . I don't understand. I only know how to enter and check correction values using the adjustment channels, but not through the encoding process. To my knowledge, the selection process only involves checking boxes and using list values. hg Herbert

Yes... Coding is the wrong term... I meant the entry of the correction values .

Hi,
You can find entries such as "Rail pressure calibration point" and "Control duration for calibration pressure" under the extended measurement data.
(see /viewtopic.php?t=28779)?
hg
Herbert.

Herbert wrote:

Hi, You can find entries such as "Rail pressure calibration point" and "Control duration for calibration pressure" under the extended measurement data. (see /viewtopic.php?t=28779)? hg Herbert

Hi there,
The two values are unfortunately not listed in the 20.4.2 section of the document.

Hi,
I had already suspected that. It appears that the available measurement data from the engine control unit in the 1.2L TDI provides relatively little information, similar to the 1.6L TDI, compared to the 2.0L TDI.
The injection quantity deviations (in time units) are likely idle correction values. In the DDYA data I analyzed, the values drop to zero when the accelerator is pressed.
The injection duration, with a constant rail pressure, is a measure of the injection quantity. When you compare the deviations with the injection duration, you see deviations in the range of 10%. For us, this has been acceptable and within the tolerance limits so far. Cylinder 1 is just a bit weaker.
Here are some additional things you can do: measure the total return flow and the return flow of each individual injector. This might reveal an anomaly. To do this, you should consult a repair manual for the engine. Is there anything from VW available at Erwin (siehe Fehlerdatenbank)?
Otherwise, a good Bosch service center might have more options for checking the engine while it's running.
Does listening to each individual cylinder make a difference?
hg
Herbert.

@Herbert

for your time and your assessment!

According to that, I don't have to replace the injector on cylinder number 1 for now. At what value should I do that?
Sure, here's the translation:

"LG" translates to "Best regards" or "Sincerely" in English.

Hi,
Let me describe it based on my experience here. Deviations in the idle speed control of more than approximately 1.5 mg/stroke (with an injection amount of 5 mg/stroke) are considered a problem. Converted to time, this means that with an injection duration of 500 microseconds, the actual injection time is 150 microseconds.
However, the idle noise isn't your problem; it's the noise under load. Therefore, I'm repeating my comment from the previous post.
hg
Herbert.